Del Mar Photonics

17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010

Brochures to present at the exhibition:

Product Data Sheets

Pulse strecher/compressor
Avoca SPIDER system
Buccaneer femtosecond fiber lasers with SHG Second Harmonic Generator
Cannon Ultra-Broadband Light Source
Cortes Cr:Forsterite Regenerative Amplifier
Infrared cross-correlator CCIR-800
Cross-correlator Rincon
Femtosecond Autocorrelator IRA-3-10
Kirra Faraday Optical Isolators
Mavericks femtosecond Cr:Forsterite laser
OAFP optical attenuator
Pearls femtosecond fiber laser (Er-doped fiber, 1530-1565 nm)
Pismo pulse picker
Reef-M femtosecond scanning autocorrelator for microscopy
Reef-RTD scanning autocorrelator
Reef-SS single shot autocorrelator
Femtosecond Second Harmonic Generator
Spectrometer ASP-100M
Spectrometer ASP-150C
Spectrometer ASP-IR
Tamarack and Buccaneer femtosecond fiber lasers (Er-doped fiber, 1560+/- 10nm)
Teahupoo femtosecond Ti:Sapphire regenerative amplifier
Femtosecond third harmonic generator
Tourmaline femtosecond fiber laser (1054 nm)
Tourmaline TETA Yb femtosecond amplified laser system
Tourmaline Yb-SS femtosecond solid state laser system
Trestles CW Ti:Sapphire laser
Trestles femtosecond Ti:Sapphire laser
Trestles Finesse femtosecond lasers system integrated with DPSS pump laser
Wedge Ti:Sapphire multipass amplifier

Multi-terawatt lasers overview
Hydrogen Thyratrons - Deuterium Thyratrons - Untriggered Spask Gaps - Triggered Spask Gaps - X-ray tube
Rincon 800 third-order scanning cross-correlator for aligning 20 Terawatt Ti:Sapphire laser
MCP + phosphorous screen for imaging of XUV radiation (14eV- 160-eV) in high harmonics experiments
Femtosecond autocorrelator Reef-RTD 700-1300 nm
New Trestles fs/CW laser system which can be easily switched from femtosecond mode to CW and back.
Femtosecond Two-stage Amplifier System Wedge-XL (table-top terawatt system) - pdf
CORTES-800 40 TERAWATT LASER SYSTEM
New Beacon Femtosecond Fluoresscence Upconversion System
Tamarack C1560 femtosecond fiber laser
Pacifica THz Time Domain Spectrometer
Wedge TiSapphire Multipass Amplifier
New Hatteras femtosecond transient absorption system
Photon Scanning Tunneling Microscope - Power Point presentation (use read-only mode)
Atomic Force Microscope AFM HERON - sample quotes
Near-field Scanning Optical Microscope (NSOM) for nano-characterization and nanomanufacturing
Yb-based high-energy fiber laser system kit, model Tourmaline Yb-ULRepRate-07
Ytterbium-doped Femtosecond Solid-State Laser Tourmaline Yb-SS400
Pismo pulse picker for 1500-1600nm range

Del Mar Photonics Product brochures - Femtosecond products data sheets (zip file, 4.34 Mbytes) - Del Mar Photonics

MA • Electron and X-Ray Diffraction
Monday, July 19
8:30 a.m.–10:15 a.m.
Majed Chergui; École Polytechnique Fédérale de Lausanne, Switzerland, Presider
MA1 • 8:30 a.m. Invited
Femtosecond Molecular Photocrystallography, Hubert Jean-Ruel, Meng Gao, Ryan R. Cooney, Cheng Lu, Germán Sciaini, Dwayne R. J. Miller;
Univ. of Toronto, Canada. Femtosecond electron diffraction is used to directly observe the cooperative structural changes associated with the
order-to-order phase transition of photochromic molecular crystals, involving classic cyclization and cycloreversion reaction mechanisms.

Notes: R.J. Dwayne Miller is the Director of the Institute for Optical Sciences at the Univ. of Toronto, Canada. He's Del Mar Phootnics customer,
using Buccaneer femtosecond fiber lasers with SHG Second Harmonic Generator

MA2 • 9:00 a.m.
Ultrafast Order Parameter Melting in a 2-D Charge Density Wave 1T-TaS2 Probed by Femtosecond Electron Diffraction, Maximilian
Eichberger1, Hanjo Schäfer1, Marina Krumova1, Jure Demsar1, Helmuth Berger2, Gustavo Moriena3, German Sciaini3, Dwayne R. J. Miller3; 1Univ. of
Konstanz, Germany, 2École Polytechnique Fédérale de Lausanne, Switzerland, 3Univ. of Toronto, Canada. We present the first study of the order
parameter dynamics in a Charge-Density-Wave system utilizing femtosecond electron diffraction. The results reveal an ultrafast
suppression of the CDW order, whose recovery proceeds on the picosecond timescale.

MA3 • 9:15 a.m.
Ultrafast Electron Diffraction from Aligned Molecules, Martin Centurion1, Peter Reckenthaeler2, Ferenc Krausz2, Ernst Fill2; 1Univ. of Nebraska at
Lincoln, USA, 2Max-Planck-Inst. für Quantenoptik, Germany. We present experimental results on ultrafast electron diffraction from transiently
aligned molecules in the absence of external (aligning) fields. The molecules are aligned selectively through a photodissociation reaction
using a femtosecond laser pulse.

Notes: Univ. of Nebraska at Lincoln is home of the ultra-high-intensity laser system, DIOCLES. DIOCLES researches use Avoca SPIDER Spectral Phase Measurement System and
Rincon Cross-Correlator Pulse Profiling Systems to measure laser pulse parameters.

MA4 • 9:30 a.m.
Single-Shot, Femtosecond Electron Diffraction, Peter Pasmans, Thijs van Oudheusden, Marieke de Loos, Bas van der Geer, Arjan Klessens, Jom
Luiten; Eindhoven Univ. of Technology, Netherlands. High-quality electron diffraction patterns can be recorded in a single sub-picosecond shot
by using radio-frequency compression techniques to overcome the Coulomb expansion of the required electron bunches. First single-shot
diffraction measurements are presented.

MA5 • 9:45 a.m.
X‐Ray Powder Diffraction with Femtosecond Time Resolution, Flavio Zamponi, Zunaira Ansari, Jens Dreyer, Michael Woerner, Thomas
Elsaesser; Max‐Born‐Inst. für Nichtlineare Optik und Kurzzeitspektroskopie, Germany. Transient electronic charge density maps with 30 picometer
spatial and 100 femtosecond temporal resolution derived from Debye Scherrer experiments unravel for the first time a concerted electron
and proton transfer in hydrogen‐bonded (NH4)2SO4 crystals.
MA6 • 10:00 a.m.
Ultrafast Lattice Dynamics in FeRh during a Laser‐Induced Magnetic Phase Transition, Uladzimir Shymanovich1, Wei Lu1, Matthieu Nicoul1,2,
Alexander Tarasevitch1, Dietrich von der Linde1, Klaus Sokolowski‐Tinten1; 1Univ. Duisburg‐Essen, Germany, 2Univ. Köln, Germany. Time‐resolved
X‐ray diffraction is used to study the lattice response of FeRh during a laser‐driven anti‐ferromagnetic to ferromagnetic phase transition.
The experiments reveal a fast and a slow component in the induced expansion dynamics.

MB • Single‐Cycle Pulse Generation
Monday, July 19
10:45 a.m.–12:30 p.m.
Franz X. Kärtner; MIT, USA, Presider
MC • 0‐D and 1‐D Quantum Systems
Monday, July 19
10:45 a.m.–12:30 p.m.
Antoinette J. Taylor; Los Alamos Natl. Lab, USA, Presider
MB1 • 10:45 a.m.
Approaching the Full Octave: Noncollinear Optical Parametric
Chirped Pulse Amplification with Two‐Color Pumping, Christian
Homann1, Daniel Herrmann1,2, Raphael Tautz2,3, Laszlo Veisz2, Ferenc
Krausz2,4, Eberhard Riedle1; 1LS für BioMolekulare Optik, Ludwig‐
Maximilians‐Univ. München, Germany, 2Max‐Planck‐Inst. für Quantenoptik,
Germany, 3LS für Photonik und Optoelektronik, Ludwig‐Maximilians‐Univ.
München, Germany, 4LS für Laserphysik, Ludwig‐Maximilians‐Univ.
München, Germany. We amplify ultrabroadband spectra (580‐1000 nm) to
mJ energies by applying different pump wavelengths in subsequent
stages of a NOPCPA chain. As proof‐of‐principle we compress pulses
composed by this new technique close to their Fourier‐Limit.
MC1 • 10:45 a.m.
Ultrafast Few‐Fermion Optoelectronics of a Single Quantum Dot,
Markus Zecherle1, Claudia Ruppert1, Emily C. Clark2, Jonathan J. Finley2,
Markus Betz1,3; 1Physik‐Dept., Technischen Univ. München, Germany,
2Walter Schottky Inst., Technischen Univ. München, Germany,
3Experimentelle Physik, Technische Univ. Dortmund, Germany. Population
dynamics, excited biexciton states, excitonic and conditional biexcitonic
Rabi oscillations in a single quantum dot embedded in a photodiode are
investigated combining pump‐probe techniques with a sensitive
photocurrent readout.
MB2 • 11:00 a.m.
Generation of Single‐Cycle Light Pulses with Compact Er:Fiber
Technology, Günther Krauss, Tobias Hanke, Alexander Sell, Stefan Eggert,
Rupert Huber, Alfred Leitenstorfer; Univ. of Konstanz, Germany. Based on a
two‐branch Er:fiber laser system we demonstrate the synthesis of 4.3 fs
pulses, corresponding to single cycles of light in the telecom frequency
band.
MC2 • 11:00 a.m.
Linewidth and Coupling of Interfacial GaAs Quantum Dots
Measured with Optical Two‐Dimensional Fourier Transform
Spectroscopy, Galan Moody1, Mark E. Siemens1, Alan D. Bristow1, Xingcan
Dai1, Denis Karaiskaj1, Allan S. Bracker2, Dan Gammon2, Steven T. Cundiff1;
1JILA, NIST, Univ. of Colorado, USA, 2NRL, USA. Optical twodimensional
Fourier‐transform spectroscopy is used to study interfacial
GaAs quantum dots (QDs). We extract the temperature dependence of
the QD homogeneous linewidth and energy relaxation from quantum
well excitons to the lower energy QDs.
MB3 • 11:15 a.m.
Towards CEP Stable, Single‐Cycle Pulse Compression with Bulk
Material, Bruno E. Schmidt1,2, Pierre Béjot3, Andrew D. Shiner2, Philippe
Lassonde1, Carlos Trallero‐Herrero2, Jean‐Pierre Wolf4, David M. Villeneuve2,
Jean‐Claude Kieffer1, Paul B. Corkum2, François Légaré1; 1INRS, Canada, 2Joint
Lab for Atto‐Second Science, Univ. of Ottawa and Natl. Res. Council Canada,
Canada, 3Univ. de Bourgogne, France, 4Univ. de Genève, Switzerland. We
demonstrate both experimentally and numerically that self‐steepening
during propagation in a hollow‐fiber followed by linear propagation
through glass in the anomalous dispersion enables pulse compression
down to 1.6 cycles at 1.8 μm wavelength.
MC3 • 11:15 a.m.
Probing Biexcitons in Quantum Dots Using Femtosecond Pump/Probe
and Two Dimensional Electronic Spectroscopy, Pooja Tyagi1, Katherine
Stone2, Daniel Turner2, Samuel Sewall1, Keith Nelson2, Patanjali
Kambhampati1; 1McGill Univ., Canada, 2MIT, USA. We report on the
electronic structure of biexcitons in CdSe quantum dots using stateselective
femtosecond pump/probe spectroscopy. The pump/probe
experiments are compared to direct probing of biexcitons via twodimensional
electronic spectroscopy.
MB4 • 11:30 a.m.
Phase‐Locked Single‐Cycle Pulses in the Multi‐THz Range with Peak
Electric Fields Exceeding 10 MV/cm, Friederike Junginger1, Alexander
Sell1, Olaf Schubert1, Bernhard Mayer1, Daniele Brida2, Marco Marangoni2,
Giulio Cerullo2, Rupert Huber1, Alfred Leitenstorfer1; 1Univ. of Konstanz,
Germany, 2Politecnico di Milano, Italy. Single‐cycle idler transients
covering the 6‐60 THz frequency window with peak amplitudes
exceeding 10 MV/cm are generated by parametric amplification of 1.3‐
μm pulses in GaSe. The temporal trace of the phase‐stable waveform is
detected electro‐optically.
MC4 • 11:30 a.m.
Hot Carrier Dynamics in Lead Sulfide Nanocrystals, Byungmoon Cho,
William K. Peters, Robert J. Hill, Trevor L. Courtney, David M. Jonas; Univ.
of Colorado, USA. Hot carriers in PbS nanocrystals are directly probed.
The data are consistent with bulk‐like small, high velocity electron and
hole wavepackets that initially feel little or no quantum confinement,
except for collisions with the surface.
MB5 • 11:45 a.m.
Self‐Referenced Oscillator Pulse Train with Constant Carrier‐
Envelope‐Offset Phase, Stefan Rausch1,2, Thomas Binhammer3, Anne
Harth1,2, Uwe Morgner1,2,4; 1Inst. of Quantum Optics, Leibniz Univ. Hannover,
Germany, 2Ctr. for Quantum Engineering and Space‐Time Res. (QUEST),
Germany, 3VENTEON Laser Technologies GmbH, Germany, 4Laser Zentrum
Hannover, Germany. We present an oscillator pulse train stabilized to
carrier‐envelope‐offset frequency zero with 65 attosecond timing jitter.
The excellent locking performance is verified by recording the
interference of more than 1010 pulses in an out‐of‐loop interferometer.
MC5 • 11:45 a.m.
Ultrafast Excitation Energy Transfer in Small Carbon Nanotube
Aggregates, Larry Lüer1, Jared Crochet2, Tobias Hertel2, Giulio Cerullo3,
Guglielmo Lanzani4; 1Madrid Inst. of Advanced Studies, IMDEA Nanociencia,
Spain, 2Univ. of Würzburg, Germany, 3Politecnico di Milano, Italy, 4Italian
Inst. of Technology, Italy. Ultrafast inter‐tube exciton transfer in small
aggregates of carbon nanotubes is studied by femtosecond spectroscopy
with degenerate broadband pulses. After separation of population
dynamics from coherent effects, transfer times below 10 fs are obtained.
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
MB • Single‐Cycle Pulse Generation—Continued
MC • 0‐D and 1‐D Quantum Systems—Continued
MB6 • 12:00 p.m.
Adiabatic Frequency Conversion of Ultrafast Pulses, Haim Suchowski1,
Barry D. Bruner1, Ady Arie2, Yaron Silberberg1; 1Weizmann Inst. of Science,
Israel, 2Tel Aviv Univ., Israel. A method for efficient frequency conversion
of ultrafast pulses is demonstrated using an adiabatic aperiodically
poled KTP crystal. We produce broadband blue pulses centered at 450
nm by upconverting 30 fs pulses in the near‐IR.
MC6 • 12:00 p.m.
Ultrafast Measurement of Mid‐Infrared Internal Exciton Transitions
of Separated Single‐Walled Carbon Nanotubes, Jigang Wang1,2, Matt. W
Graham3, Yingzhong Ma3, Graham R. Fleming3, Robert. A. Kaindl2; 1Dept. of
Physics and Astronomy, Ames Lab, Iowa State Univ., USA, 2Materials
Sciences Div., Lawrence Berkeley Natl. Lab, USA, 3Univ. of California at
Berkeley and Physical Biosciences Div., Lawrence Berkeley Natl. Lab, USA.
We report ultrafast mid‐infrared studies of individualized
semiconducting carbon nanotubes. Transient spectra of (6,5) and (7,5)
nanotubes evidence a photoinduced resonance around 200 meV,
associated with intra‐excitonic transitions that reflect quasi‐1‐D exciton
formation and dynamics.
MB7 • 12:15 a.m.
Temporal and Spatial Lensing with an Intense Single‐Cycle Terahertz
Pulse, Yuzhen Shen, G. L. Carr, James B. Murphy, Thomas Y. Tsang, Xijie
Wang, Xi Yang; Brookhaven Natl. Lab, USA. We demonstrate that an
intense subpicosecond single‐cycle terahertz pulse in an electro‐optic
medium can act as a temporal and spatial lens to phase modulate and
focus a co‐propagating ultrashort laser pulse.
MC7 • 12:15 p.m.
Two‐Dimensional Electronic Spectroscopy of Semiconducting Single‐
Walled Carbon Nanotubes , Matthew W. Graham1, Tessa R. Calhoun1,
Alex A. Green2, Mark C. Hersam2, Graham R. Fleming1; 1Univ. of California at
Berkeley, USA, 2Northwestern Univ., USA. Application of 2‐D Fourier
transform electronic spectroscopy for semiconducting SWNTs is
demonstrated to decongest complex exciton dynamics. Analysis
provides the E22 homogeneous linewidth, and elucidates the role of
vibrational and multi‐exciton states in population relaxation.
12:30 p.m.–2:00 p.m. Lunch Break (on your own)
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
MD • High Harmonic Generation
Monday, July 19
2:00 p.m.–3:45 p.m.
Andrius Baltuska; Vienna Univ. of Technology, Austria, Presider
MD1 • 2:00 p.m. Invited
High Harmonic Generation by High Energy OPA Source, E. J. Takahashi, P. Lan, Y. Nabekaw, Katsumi Midorikawa; RIKEN, Japan. We have
demonstrated efficient generation of water‐window X‐ray harmonics by using an IR parametric source in neutral rare‐gas media. Generation of
isolated attosecond pulses by mixing IR and 800 nm laser fields is also discussed.
MD2 • 2:30 p.m.
Short Wavelength Generation at High Repetition Rate by Direct High Harmonic Generation, Steffen Hädrich1,2, Jan Rothhardt1,2, Manuel Krebs1,
Stefan Nolte1, Jens Limpert1,2, Andreas Tünnermann1,2,3; 1Friedrich‐Schiller‐Univ. Jena, Germany, 2Helmholtz‐Inst. Jena, Germany, 3Fraunhofer Inst. for Applied
Optics and Precision Engineering, Germany. Short wavelength generation by direct high harmonic generation of high repetition rate fiber laser based
systems is presented. We show possibilities for peak power enhancement, pulse shortening and increased conversion efficiency.
MD3 • 2:45 p.m.
Power Scaling of High‐Repetition‐Rate HHG, Arman Cingöz1, Dylan C. Yost1, Jun Ye1, Axel Ruehl2, Martin Fermann2, Ingmar Hartl2; 1JILA, NIST, Univ.
of Colorado, USA, 2IMRA America, Inc., USA. We report on cavity‐enhanced HHG with a frequency comb delivering 120‐fs pulses and 80‐W average
power at 154‐MHz repetition rates. With 5‐kW average intracavity powers, average HHG powers beyond the microwatt level have been achieved.
MD4 • 3:00 p.m.
High Power Femtosecond Frequency Comb for Intracavity High Harmonic Generation, Jane Lee, Justin Paul, R. Jason Jones; Univ. of Arizona, USA.
We report on a high power (~6.5 Watts) Ti:sapphire based frequency comb (50MHz) generating ~25 microjoule pulses inside an enhancement cavity.
Intracavity high‐harmonic generation produces over 2.5 microwatts integrated power from 73 to 53 nm.
MD5 • 3:15 p.m.
XUV Frequency Comb Spectroscopy, Christoph Gohle1,2, Dominik Z. Kandula1, Tjeerd J. Pinkert1, Wim Ubachs1, Kjeld S. E. Eikema1; 1Laser Ctr. Vrije Univ.,
Netherlands, 2Ludwig‐Maximilians‐Univ., Germany. We report the first demonstration of frequency comb metrology at extreme ultraviolet wavelengths
(XUV), based on parametric amplification and high‐harmonic generation of frequency comb pulses, which results in an 8‐fold improved helium
ionization potential.
MD6 • 3:30 p.m.
Temporal Gating Based on Electron Wavepacket Diffusion for XUV Supercontinuum Generation, Francesca Calegari1, Caterina Vozzi1, Matteo
Negro1, Fabio Frassetto2, Luca Poletto2, Paolo Villoresi2, Giuseppe Sansone1, Mauro Nisoli1, Sandro De Silvestri1, Salvatore Stagira1; 1Politecnico di Milano CNRIFN,
Italy, 2Univ. di Padova CNR‐IFN, Italy. We demonstrate experimentally and theoretically a gating technique based on the electron wavepacket
diffusion for the generation of a broadband XUV continuum exploiting the combination of infrared and visible driving pulses in a two‐color scheme.
3:45 p.m.–4:15 p.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
ME • Poster Session I
Monday, July 19, 3:45 p.m.–4:45 p.m. and 6:30 p.m–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ME1
Spatio‐Temporal Characterization of Single‐
Order High Harmonic Pulses Separated by
Pulse‐Front‐Tilt Compensator, Motohiko Ito,
Yoshimasa Kataoka, Taro Sekikawa; Dept. of
Applied Physics, Hokkaido Univ., Japan. Extreme
ultraviolet single‐order harmonic pulses,
separated by a pulse‐front‐tilt compensator,
were spatially and temporally characterized to
have a spot size of 58 μm at focus and a pulse
duration of 47 fs.
ME2
Femtosecond Laser‐Induced
Ionization/Dissociation of Amino Acids and
Their Derivatives, Christine L. Kalcic, Gavin E.
Reid, Marcos Dantus; Michigan State Univ.,
USA. Ultrafast photodissociation mass spectra
are presented for the protonated amino acids
and their derivatives. The spectral library is
used to better understand the mechanism by
which a Ti:Sapphire laser activates trapped
ions to induce fragmentation.
ME3
Chirped‐Probe‐Pulse Femtosecond Coherent
Anti‐Stokes Raman Scattering for Single‐
Laser‐Pulse Flame Temperature
Measurements, Daniel R. Richardson1, Robert P.
Lucht1, Waruna D. Kulatilaka2, Sukesh Roy2,
James R. Gord3; 1Purdue Univ., USA, 2Spectral
Energies, LLC, USA, 3AFRL, Wrigth Patterson
Air Force Base, USA. Single‐laser‐pulse
temperature measurements are made at 1000
Hz by femtosecond coherent anti‐Stokes
Raman scattering (CARS) with a chirpedprobe‐
pulse. The temporal decay of the
Raman coherence is mapped onto the
frequency of the CARS signal.
ME4
Coherent Effects in the Carbonyl Containing
Carotenoid Fucoxanthin, Nina Gildenhoff,
Kathi Gundermann, Claudia Büchel, Josef L.
Wachtveitl; Goethe‐Univ. Frankfurt, Germany.
Coherent effects in the isolated carbonyl
containing carotenoid fucoxanthin in various
solvents and fucoxanthin within the
fucoxanthin‐chlorophyll protein were
investigated using femtosecond transient
absorption spectroscopy.
ME5
Ultrafast Excited‐State Dynamics and
Photochemistry of Base‐off
Adenosylcobalamin and n‐Propylcobalamin,
Jian Peng, Roseanne J. Sension; Univ. of
Michigan, USA. UV‐visible femtosecond
transient absorption spectroscopy was used to
investigate the photochemistry of base‐off
cobalamins. The results highlight the influence
of the lower axial ligand on the electronic
structure and the reactivity of the C‐Co bond.
ME6
Femtosecond Photoisomerization Study on
Azobenzene‐Derivative Bound by DNA, Tao
Chen1, Kazumasa Igarashi1, Atsushi Yamaguchi1,
Naoya Nakagawa1, Keisaku Yamane1, Taiga Fujii2,
Hiroyuki Asanuma2, Mikio Yamashita1; 1Dept. of
Applied Physics, Hokkaido Univ. and CREST‐JST,
Japan, 2Graduate School of Engineering, Nagoya
Univ. and CREST‐JST, Japan. First observation
of femtosecond absorbance change in
azobenzene‐derivative (AzD) bound by
double‐strand DNA, that by single‐strand
DNA and Azd shows trans‐to‐cis
photoisomerization rate per pulse in the
former is much lower than in the latter.
ME7
Relaxation Dynamics of 8ʹ‐Apo‐β‐Caroten‐8ʹ‐
al: Excitation Energy Dependence , Yoonsoo
Pang1,2, Graham R. Fleming1,2; 1Univ. of California
at Berkeley, USA, 2Lawrence Berkeley Natl. Lab,
USA. Infrared and visible transient absorption
measurements of the carotenoid 8ʹ‐apo‐β‐
caroten‐8ʹ‐al following the direct S1 excitation
and the hot S2 excitation show a distinct
relaxation dynamics which generates a longlived
species.
ME8
Fulgides: Efficiency of the Ring‐Opening
Reaction Tuned by Optical Pre‐Excitation,
Thomas Brust1, Simone Draxler1, Watson J. Lees2,
Karola Rück‐Braun3, Markus Braun1,4, Wolfgang
Zinth1; 1Ludwig‐Maximilians‐Univ. München,
Germany, 2Florida Intl. Univ., USA, 3Technische
Univ. Berlin, Germany, 4Goethe‐Univ. Frankfurt,
Germany. Multipulse femtosecond absorption
experiments show that the quantum efficiency
for ring‐opening of indolylfulgides is strongly
increased when a ring‐closure reaction
precedes by only a few picoseconds.
ME9
Femtosecond UV Studies of Relaxation
Processes in Cytochrome C, Andrea Cannizzo,
Oliver Bräm, Cristina Consani, Frank van Mourik,
Majed Chergui; École Polytechnique Fédérale de
Lausanne, Switzerland. UV Femtosecond
fluorescence and transient‐absorption studies
of ferric and ferrous cytochrome‐C are
presented. We characterize their photocycles
which are described in terms of a model based
on electron metal‐to‐heme back‐donation from
occupied metal d orbitals.
ME10
Highly Efficient Energy Transfer in a Dyad
with Orthogonally Arranged Transition
Dipole Moments: Beyond the Limits of
Förster? Igor Pugliesi1, Andreas Walter2, Heinz
Langhals2, Eberhard Riedle1; 1LS für
BioMolekulare Optik, Ludwig‐Maximilians‐Univ.
München, Germany, 2Dept. für Chemie, Ludwig‐
Maximilians‐Univ. München, Germany. Perylene
bisimide dyads mediate an ultrafast energy
transfer contradicting the Förster
approximation through their transition
densities. The high monomeric fluorescence
quantum yield leads to near unit efficiency
making them suitable candidates for
molecular electronic circuitry.
ME11
Unusually Rapid Energy Transfer and
Internal Conversion in Xanthorhodopsin and
Its Carotenoid Antenna, Jingyi Zhu1, Itay
Gdor1, Elena Smolensky2, Noga Friedman2,
Mordechai Sheves2, Sandford Ruhman1; 1Hebrew
Univ. of Jerusalem, Israel, 2Weizmann Inst. of
Science, Israel. Internal conversion and energy
transfer from S2 of the salinixanthine antenna
in xanthorhodopsin takes less than 30 fs,
leading to lower singlets with rotated
transition dipoles. This timescale questions
models of resonant electronic energy transfer.
ME12
Uncovering Coherent and Incoherent
Vibrational Interactions in a Transition
Metal Mixed Valence Complex Using
Femtosecond Two‐Dimensional Infrared
Spectroscopy, Michael Lynch, Mark Cheng,
Benjamin Van Kuiken, Stephanie Daifuku, Munira
Khalil; Univ. of Washington, USA. Femtosecond
polarization‐selective nonlinear infrared
spectroscopies reveal a detailed molecular
picture of coherent and incoherent vibrational
relaxation dynamics of a cyano‐bridged mixed
valence complex in a polar solvent.
ME • Poster Session I
Monday, July 19, 3:45 p.m.–4:45 p.m. and 6:30 p.m–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ME13
Monitoring the External Vibrational Control
of Excitation‐Energy Transfer Using Pump‐
Probe Polarization Spectroscopy, Jason D.
Biggs, Jeffrey A. Cina; Univ. of Oregon, USA. We
have developed a method for controlling
electronic‐excitation transfer in chromophore
dimers using pulse‐induced nuclear motion.
We further developed the framework needed
to simulate various nonlinear optical
experiments on such systems.
ME14
Excitation Energy Dependence of the S1 and
ICT State Dynamics in Marine Carotenoids
Studied by Femtosecond One‐ and Two‐
Photon Pump‐Probe Spectroscopy, Daisuke
Kosumi1, Satoshi Maruta1, Toshiyuki Kusumoto1,
Ritsuko Fujii1, Mitsuru Sugisaki1, Masahiko Iha2,
Harry A. Frank3, Hideki Hashimoto1; 1JST,
CREST, Osaka City Univ., Japan, 2South Product
Co. Ltd., Japan, 3Univ. of Connecticut, USA. The
ultrafast excited state dynamics of fucoxanthin
in a polar solvent have been investigated by
femtosecond one‐ and two‐photon pumpprobe
spectroscopic measurements. Transient
absorption spectra and their kinetics depend
strongly on excitation energy.
ME15
Sensitizer Exchange Dynamics in Air and
Solvent Filled Semiconductor Nanocavities,
Jouko E. I. Korppi‐Tommola1, Jan Helbing2, Niko
Humalamäki1, Matti Haukka3, Esben Andresen4,
Peter Hamm2; 1Univ. of Jyväskylä, Finland, 2Univ.
Zürich, Switzerland, 3Univ. of Joensuu, Finland,
4Univ. Aix Marseille, France. Multiple dye
binding sites and their exchange in
equilibrium in air and solvent filled sensitized
titanium oxide nanocavities were identified by
2DIR spectroscopy. Binding geometry and
flexibility may influence electron injection
efficiency of solar cells.
ME16
Ultrafast Polarized Raman as a Probe of
Solvation Shell Structure and Dynamics in
Aqueous Salt Solutions, Ismael A. Heisler,
Stephen R. Meech; Univ. of East Anglia, UK. An
ultrafast diffractive optic transient grating
experiment was used to record isotropic THz
Raman spectra of aqueous ions. A low
frequency mode, absent in pure water,
associated with halide ‐ water H‐bond modes
is reported.
ME17
Conserving Optical Coherence through the
Conical Intersection during Retinal
Isomerization in Bacteriorhodopsin, Valentin
I. Prokhorenko1, Alexei Halpin1, Leonid S. Brown2,
R. J. Dwayne Miller1; 1Univ. of Toronto, Canada,
2Univ. of Guelph, Canada. Two‐dimensional
electronic spectroscopy of retinal
isomerization in bacteriorhodopsin allows
tracking the dynamics of the reaction
coordinate. Optically induced coherence still
persists even after 5 ps, where no excited‐state
population of the initial isomer is present.
ME18
Selective Excitation of Resonances in 2‐D
Fourier Transform Optical Spectroscopy
with Tailored Pulse Shapes, Patrick Wen,
Dylan H. Arias, Daniel B. Turner, Keith A.
Nelson; MIT, USA. Shaped pulses, with phase
windows and double amplitudes, are tailored
for specific resonances in 2‐D Fourier
transform optical spectroscopy. Pulses,
designed using Feynman pathway analysis,
selectively enhance biexciton peaks in 2‐D
spectra of quantum wells.
ME19
Ultrafast Dynamics of Phosphate‐Water
Interactions in Hydrated DNA, Lukasz Szyc,
Ming Yang, Thomas Elsaesser; Max‐Born‐Inst. für
Nichtlineare Optik und Kurzzeitspektroskopie,
Germany. Interactions between DNA and the
surrounding water shell are mapped via the
ultrafast response of the asymmetric
phosphate stretching vibration νAS (PO2)‐. The
water shell serves as the primary heat sink for
excess energy.
ME20
Semiconductor Saturable Absorbers for
Ultrafast THz Signals, Matthias C. Hoffmann1,
Dmitry Turchinovich2; 1Max‐Planck Res. Dept. for
Structural Dynamics, Univ. of Hamburg,
Germany, 2DTU Fotonik, Dept. of Photonics
Engineering, Technical Univ. of Denmark,
Denmark. We demonstrate saturable absorber
behavior of n‐type semiconductors in the THz
frequency range using nonlinear THz
spectroscopy. Further, we observe THz pulse
shortening and increase of the group
refractive index at high field strengths.
ME21
Conductivity in Dye‐Sensitized TiO2 Probed
by Optical‐Pump THz‐Probe Spectroscopy,
Jan C. Brauer, Joël Teuscher, Angela Punzi,
Jacques‐Edouard Moser; École Polytechnique
Fédérale de Lausanne, Switzerland. Employing
optical‐pump THz‐probe spectroscopy we
have investigated the photo‐ induced
conductivity dynamics in dye‐sensitized
mesoporous anatase films as well as the
influence of dye aggregates on the injection
dynamics.
ME22
Compact and Widely Tunable Sub‐50 fs
Laser Source with 30 mW to 300 mW Output
Power at 44 MHz Repetition Rate for
Nonlinear Spectroscopy Applications, Bernd
Metzger, Andy Steinmann, Felix Hoos, Sebastian
Pricking, Harald Giessen; 4th Physics Inst., Univ.
of Stuttgart, Germany. We pump tapered fibers
with a novel Yb:KGW oscillator and compress
different spectral parts of the supercontinuum
using a simple prism sequence to generate
tunable sub‐50 fs pulses in the visible and near
IR.
ME23
Non‐Collinear Optical Parametric
Amplification of near‐IR Pulses in KTiOPO4
at a High Repetition Rate, Oleksandr
Isaienko1,2, Eric Borguet1, Peter Voehringer2;
1Temple Univ., USA, 2Inst. for Physical and
Theoretical Chemistry, Univ. of Bonn, Germany.
We demonstrate broadband non‐collinear
optical parametric amplification of near‐IR
pulses in bulk KTiOPO4 pumped with 800‐nm
pulses at 250‐kHz repetition rate. Conversion
efficiencies of ~20% are achieved when
employing two subsequent NOPA stages.
ME24
Synthesis of Subfemtosecond Periodic
Waveforms, Han‐Sung Chan1,2, Zhi‐Ming
Hsieh3, Wei‐Hong Liang1,2, A. H. Kung2,4, Chao‐
Kuei Lee5, Ru‐Pin Pan1, Lung‐Han Peng3; 1Natl.
Chiao Tung Univ., Taiwan, 2Academia Sinica,
Taiwan, 3Natl. Taiwan Univ., Taiwan, 4Natl.
Tsing Hua Univ., Taiwan, 5Natl. Sun Yat‐Sen
Univ., Taiwan. Periodic optical waveforms of
arbitrary shape in the femtosecond and
subfemtosecond time scale are synthesized
from a comb generated by molecular
modulation.
ME • Poster Session I
Monday, July 19, 3:45 p.m.–4:45 p.m. and 6:30 p.m–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ME25
Continuum Generation in Laser Host
Materials towards Table‐Top OPCPA,
Maximilian Bradler, Peter Baum, Eberhard Riedle;
LS für BioMolekulare Optik, Ludwig‐
Maximilians‐Univ. München, Germany. We
demonstrate white‐light generation in seven
previously unutilized laser host materials with
up to ps pump pulses. Only μJ pulses are
necessary for stable continua with smooth,
plateau‐like spectra from deep UV to the
infrared.
ME26
Characterization of Isolated Attosecond
Pulses with Ultrabroad Bandwidth, Sabih D.
Khan, Michael Chini, Steve Gilbertson, Zenghu
Chang; Dept. of Physics, Kansas State Univ.,
USA. We report a new technique for
attosecond pulse characterization based on
interference of quantum transitions induced
by single infrared photons.
ME27
Generation and Amplification of 400 nm
Band Picosecond Optical Pulses by GaInN
Laser Diodes, Rintaro Koda1, Tomoyuki Oki1,2,
Takao Miyajima1, Hideki Watanabe1, Masaru
Kuramoto1,2, Masao Ikeda1,2, Hiroyuki Yokoyama2;
1Advanced Materials Labs, Sony Corp., Japan,
2New Industry Creation Hatchery Ctr., Tohoku
Univ., Japan. We demonstrate the generation of
20W peak power, 3ps optical pulses using a
combination of a GaInN‐based, mode‐locked
laser diode and an optical amplifier. A strong
nonlinear phase shift over 4π has also been
observed.
ME28
Linear Characterization of Attosecond
Pulses, Oren Raz, Osip Schwartz, Dan Oron,
Nirit Dudovich; Weizmann Inst. of Science, Israel.
We propose a linear method for characterizing
attosecond pulses. The method is based on the
polarization state of each spectral component,
and some a‐priori knowledge about the
measured pulse: Gaussian (or faster) decay in
time.
ME29
Harmonic Continua by Chirp Assisted
Polarization Gating, Mirko Holler, Florian
Schapper, Thomas Remetter, Lukas Gallmann,
Ursula Keller; ETH Zürich, Switzerland. We
demonstrate a new scheme to generate
harmonic continua starting with 12 fs laser
pulses based on polarization gating. The
effectiveness of the gating method is
confirmed by an SFA calculation.
ME30
Strategies for Scatter Removal in Two‐
Dimensional Electronic Spectroscopy in the
Pump‐Probe Geometry, Kristin L. M. Lewis,
Jeffrey A. Myers, Franklin Fuller, Patrick F.
Tekavec, Jennifer P. Ogilvie; Univ. of Michigan,
USA. We present experimental strategies for
removing scatter from multiple sources in two
dimensional electronic spectroscopy in the
pump‐probe geometry. Uncorrected, pumppump
scatter and phase‐matched pump‐probe
signals can distort 2‐D peak shapes,
complicating their interpretation.
ME31
Optically‐Pumped SESAM for Fast
Switching between Continuous Wave and
Passively Mode Locked Regimes of a
Femtosecond Pulse Cr4+:forsterite Laser,
Christopher G. Leburn, Christian T. A. Brown,
Wilson Sibbett; Univ. of St Andrews, UK. We
report on fast switching between continuouswave
mode‐locked and continuous‐wave
operation of a Cr4+:forsterite femtosecond laser
operating at 1300 nm, by means of a GaInNAs
SESAM that is optically excited by an external
diode laser.
ME32
Full Control of Polarization Shaped Pulses
Using a Phase‐Locked Mach‐Zehnder
Interferometer, Masaaki Sato, Takayuki Suzuki,
Kazuhiko Misawa; Tokyo Univ. of Agriculture and
Technology, Japan. We achieved reliable and
stable generation of pulses with all possible
polarization states by a Mach‐Zehnder pulse
shaper stabilized using an external laser
diode. We generated and measured chiral
pulses with twisted polarizing orientation.
ME33
Carrier‐Envelope Phase Stabilized Soliton‐
Effect Compressed Sub‐Two‐Cycle Pulse
Source, Alexandra A. Amorim1,2, Luís M.
Bernardo1, Franz X. Kärtner3, Helder Crespo1;
1IFIMUP and IN ‐ Inst. of Nanoscience and
Nanotechnology, Dept. de Física, Faculdade de
Ciências, Univ. do Porto, Portugal, 2Dept. de
Física, Inst. Superior de Engenharia do Porto,
Portugal, 3Dept. of Electrical Engineering and
Computer Science and Res. Lab of Electronics,
MIT, USA. We present a simple and efficient
scheme for generating carrier‐envelope phase
stabilized sub‐two‐cycle pulses based on
soliton‐effect self‐compression of standard
femtosecond laser pulses in millimeter‐long
highly‐nonlinear photonic crystal fibers.
ME34
Strong HOMO Signature in High Order
Harmonics Driven in CO2 by a Few‐Cycle 1.5
μm Parametric Source, Caterina Vozzi1, Matteo
Negro1, Francesca Calegari1, Fabio Frassetto2,
Mauro Nisoli1, Luca Poletto2, Giuseppe Sansone1,
Paolo Villoresi2, Sandro De Silvestri1, Salvatore
Stagira1; 1Politecnico di Milano, Italy, 2Univ. di
Padova, Italy. High order harmonics driven by
an ultrafast IR parametric source were
generated in aligned CO2; the experimental
results present a clear spectral minimum
related to the HOMO structure.
ME35
Below‐Threshold High‐Order Harmonics
Probed with Aligned Molecules, Hadas
Soifer1, Pierre Botheron2, Dror Shafir1, Adi Diner1,
Oren Raz1, Barry Bruner1, Yann Mairesse2,
Bernard Pons2, Nirit Dudovich1; 1Weizmann Inst.
of Science, Israel, 2Univ. de Bordeaux 1‐CNRSCEA,
France. We present a new approach to
probe the High‐Harmonic Generation process.
We use aligned molecules to study belowthreshold
harmonics and identify two distinct
contributions to the emitted harmonics.
ME36
Electron Release Times in Double Ionization
by Elliptically Polarized Laser Pulses, Adrian
N. Pfeiffer1, Claudio Cirelli1, Mathias Smolarski1,
Ursula Keller1, Reinhard Dörner2; 1ETH Zürich,
Switzerland, 2Inst. für Kernphysik, Johann
Wolfgang Goethe Univ., Germany. We explore
the possibility to measure the electron release
times in double ionization by elliptically
polarized laser pulses and provide
experimental results for a 30‐fs and a 5‐fs laser
pulse.
ME37
Direct Frequency Comb Spectroscopy in a
Linear Paul Trap, Anne Lisa Wolf1,2, Jonas
Morgenweg1, Steven van den Berg2, Wim Ubachs1,
Kjeld S. E. Eikema1; 1Vrije Univ., Netherlands,
2Van Swinden Lab, Netherlands. Direct
frequency comb spectroscopy is demonstrated
for ions in a Paul trap for the first time. We
measured a single‐photon transition at 394 nm
in a crystal of calcium ions with 0.5 MHz
accuracy.
ME • Poster Session I
Monday, July 19, 3:45 p.m.–4:45 p.m. and 6:30 p.m–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ME38
Observation of High Energy Protons Ejected
from Small Polyatomic Molecules in Laser
Induced Fragmentation, Stefan Roither1,
Xinhua Xie1, Daniil Kartashov1, Li Zhang1,
Huailiang Xu2, Atshushi Iwasaki2, Markus
Schöffler3, Georg Reider1, Reinhard Dörner3, Kaoru
Yamanouchi2, Andrius Baltuška1, Markus Kitzler1;
1Photonics Inst., Vienna Univ. of Technology,
Austria, 2Dept. of Chemistry, School of Science,
Univ. of Tokyo, Japan, 3Inst. für Kernphysik, J. W.
Goethe Univ. Frankfurt, Germany. Remarkably
high energies of protons ejected from three
different species of small polyatomic
molecules during laser‐induced fragmentation
are observed using coincidence momentum
spectroscopy. The results imply that the
responsible field‐driven dynamics are a
general phenomenon.
ME39
Quantized Extrinsic Piezoelectricity in
Quantum Dots Revealed by Coherent
Acoustic Phonons, Pooja Tyagi, Ryan Cooney,
Samuel Sewall, D. M. Sagar, Jonathan Saari,
Patanjali Kambhampati; McGill Univ., Canada.
Employing real time observation of coherent
acoustic phonons, we demonstrate a novel
extrinsic piezoelectric response of quantum
dots, that is quantized, tunable and an order
of magnitude larger than their intrinsic piezo
response.
ME40
Nanolocalization of Ultrashort Time‐
Reversed Pulses in Random Nanoparticle
Assemblies, Dominik Differt1, F. Javier García de
Abajo2, Walter Pfeiffer1, Christian Strüber1, Dmitri
V. Voronine1; 1Univ. of Bielefeld, Germany, 2Inst.
de Optica, Spain. Localization of time‐reversed
optical fields in random nano‐assemblies is
investigated. It is shown that a structural
hierarchy of the scatterers (i.e., the presence of
a far‐field reverberation chamber) improves
the nanolocalization of time‐reversed waves.
ME41
Transient Reversal of a Peierls‐Transition:
Extreme Phonon Softening in Laser‐Excited
Bismuth, Wei Lu1, Matthieu Nicoul1,2, Uladzimir
Shymanovich1, Alexander Tarasevitch1, Martin
Kammler1, Michael Horn von Hoegen1, Dietrich
von der Linde1, Klaus Sokolowski‐Tinten1; 1Univ.
Duisburg‐Essen, Germany, 2Univ. Köln,
Germany. Laser‐excited coherent optical
phonons in Bismuth were investigated using
time‐resolved X‐ray diffraction. The observed
extreme softening of the excited A1g‐mode
presents strong indication that the Peierlsdistortion
defining the equilibrium structure
of Bismuth is transiently reversed.
ME42
Noncollinear Broadband Terahertz‐Pump—
Terahertz‐Probe Spectroscopy of
Semiconductors, Matthias C. Hoffmann,
Vikaran Khanna, Andrea Cavalleri; Max‐Planck
Res. Dept. for Structural Dynamics, Univ. of
Hamburg, Germany. Saturated absorption and
intervalley scattering in n‐type
semiconductors were observed using
noncollinear THz‐pump—THz probe
spectroscopy with ultrabroadband probe
pulses.
ME43
Electron‐Phonon Coupling in Cuprate High‐
Temperature Superconductors Determined
from Femtosecond Electron Relaxation Rates,
Christoph Gadermaier1, Alexander S.
Alexandrov2,3, Viktor V. Kabanov1, Primoz Kusar1,
Tomaz Mertelj1, Xin Yao4, Cristian Manzoni5,
Daniele Brida5, Giulio Cerullo5, Dragan
Mihailovic1; 1Complex Matter Dept., Jozef Stefan
Inst., Slovenia, 2Dept. of Physics, Loughborough
Univ., UK, 3Jozef Stefan Inst., Slovenia, 4Dept. of
Physics, Shanghai Jiao Tong Univ., China, 5Natl.
Lab for Ultrafast and Ultraintense Optical Science,
INFM‐CNR, Dept. di Fisica, Politecnico di
Milano, Italy. The strong electron‐phonon
interaction in cuprate superconductors
determined from femtosecond electron
relaxation times suggest a fundamental
importance of phonons and in particular
polaronic effects in the high‐temperature
superconductivity mechanism.
ME44
3‐D Magnetization and Anisotropy
Dynamics in Thin Iron Films Studied with
Time‐Resolved Magneto‐Optical Kerr Effect,
Ettore Carpene1, Eduardo Mancini1, Claudia
Dallera1, Ezio Puppin2, Sandro De Silvestri1;
1IFN‐CNR, Dept. di Fisica, Politecnico di Milano,
Italy, 2CNISM, Dept. di Fisica, Politecnico di
Milano, Italy. We investigated the threedimensional
dynamics of the magnetization
vector launched by a short laser pulse in thin
Fe films. Our experiment provides the direct
evidence of the phenomenological mechanism
triggering the magnetization precession.
ME45
Withdrawn
ME46
Coherent Polarons in Ferromagnetic
La0.7Sr0.3MnO3, Michael Först1, Cristian
Manzoni1, Stefan Kaiser1, Yasuhide Tomioka2,
Yoshinori Tokura3, Andrea Cavalleri1; 1Max‐
Planck Res. Group for Structural Dynamics, Univ.
of Hamburg, Germany, 2Correlated Electron
Engineering Group, AIST, Japan, 3Dept. of
Applied Physics, Univ. of Tokyo, Japan. Polarons,
mixed modes of solids comprising electronic
and lattice excitations, underpin the electronic
properties of strongly‐correlated oxides. We
demonstrate their coherent formation in
ferromagnetic La0.7Sr0.3MnO3, enabled via
direct lattice excitation in the mid‐infrared.
ME47
Nonlinear Josephson Effect in High‐Tc
Cuprates, A. Dienst1, M. C. Hoffmann2, D.
Fausti2, S. Pyon3, T. Takayama3, H. Takagi3,4, A.
Cavalleri1,2; 1Univ. of Oxford, UK, 2Max‐Planck
Dept. for Structural Dynamics, Univ. of
Hamburg, Germany, 3Univ. of Tokyo, Japan,
4RIKEN Advanced Science Inst., Japan. The hightemperature
superconductor La1.84Sr0.16CuO4 is
excited with high intensity terahertz pulses
tuned to the 1.9‐terahertz Josephson Plasma
Resonance. The strong interlayer tunneling
current modulates the microscopic properties
of the superconductor.
ME48
Ultrafast Resonant Soft X‐Ray Scattering in
Manganites: Direct Measurement of Time‐
Dependent Orbital Order, Henri Ehrke1,2,3,
Raanan I. Tobey1,2, Simon Wall1,2, Stuart A.
Cavill3, D. Prabhakaran1, Andrew T. Boothroyd1,
Michael Gensch4, P. Reutler5, Alexandre
Revcolevschi5, Sarnjeet S. Dhesi3, Andrea
Cavalleri1,2; 1Univ. of Oxford, UK, 2Max‐Planck
Dept. for Structural Dynamics, Univ. of
Hamburg, Germany, 3Diamond Light Source, UK,
4Helmholtz Zentrum Berlin, Germany, 5Lab de
Physico‐Chimie de l’Etat Solide, Univ. Paris Sud,
France. We present ultrafast resonant soft‐Xray
diffraction measurements of timedependent
orbital order in the single‐layermanganite
La0.5Sr1.5MnO4. These experiments
reveal the appearance of a metastable phase
with reduced ordering, different from any
thermal state of the system.
ME • Poster Session I
Monday, July 19, 3:45 p.m.–4:45 p.m. and 6:30 p.m–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ME49
Configuration Extraction of Coulomb‐
Induced Nonlinearities in Semiconductor
Quantum Wells, Ryan P. Smith1, Andrew C.
Funk1, Jared K. Wahlstrand1, Steven T. Cundiff1,
Johannes T. Steiner2, Martin Schafer2, Mackillo
Kira2, Stephan W. Koch2; 1JILA, NIST, Univ. of
Colorado, USA, 2Dept. of Physics and Material
Sciences Ctr., Philipps‐Univ., Germany. We
report quantitative spectrally‐resolved
transient absorption in GaAs quantum wells.
Microscopic modeling extracts many‐body
configurations and attributes effects to
observed spectra. Our techniques allow
investigation of the effects of light statistics on
many‐body interactions.
ME50
Femtosecond Study of Photodoping
Phenomena in a Parent Compound of a
High‐Temperature Superconductor, Markus
Beyer1, Kyungwan Kim1, Viktor Kabanov2,3, Hanjo
Schäfer1, Gennady Logvenov4, Ivan Bozovic4, Jure
Demsar1,2,3; 1Physics Dept. and Ctr. of Applied
Photonics, Univ. Konstanz, Germany,
2Zukunftskolleg, Univ. Konstanz, Germany,
3Complex Matter Dept., Jozef Stefan Inst.,
Slovenia, 4Brookhaven Natl. Lab, Condensed
Matter and Materials Science, USA. We present
the first spectrally‐resolved study of the
femtosecond dynamics in La2CuO4, the
undoped parent‐compound of the hightemperature
superconductor. The data reveal
strong band‐gap renormalization and the
appearance of in‐gap states attributed to
photo‐doping.
ME51
Coherent Control of the Selected Excited
State by Two‐Color Multipulse Excitation,
Kenta Abe1, Ryosuke Nakamura1,2, Hideki
Hashimoto2,3, Masayuki Yoshizawa1,2; 1Tohoku
Univ., Japan, 2JST, CREST, Japan, 3Osaka City
Univ., Japan. The selected excited state is
controlled by combination of the first pump
pulse generating the target state and the
second shaped pump pulse. Coherent
vibrations can be induced even in the optically
forbidden state.
ME52
Strongly Coupled Vibronic Modes
Investigated by Means of Four‐Wave Mixing
Spectroscopy, Mitsuru Sugisaki1, Daisuke
Kosumi1, Keisuke Saito1, Ritsuko Fujii1, Richard J.
Cogdell2, Hideki Hashimoto1; 1Osaka City Univ.,
Japan, 2Univ. of Glasgow, UK. Vibronic coherent
oscillations of carotenoids have been
investigated under various excitation
conditions. It was found that coupled modes
can be excited in the stimulated photon‐echo
configuration. A model that explains the
results is discussed.
NOTES

July 19
4:45 p.m.–6:45 p.m.
R. J. Dwayne Miller; Univ. of Toronto, Canada, Presider
MG • Strongly Correlated Materials
Monday, July 19
4:45 p.m.–6:45 p.m.
Robert Schoenlein; Lawrence Berkeley Natl. Lab, USA, Presider
MF1 • 4:45 p.m.
Three‐Dimensional Infrared Spectroscopy (3‐D‐IR) of Isotopically
Substituted Liquid Water, Sean Garrett‐Roe1, Fivos Perakis1, Francesco
Rao2, Peter Hamm1; 1Inst. of Physical Chemistry, Univ. of Zürich, Switzerland,
2Lab de Chimie Biophysique/ISIS, Univ. de Strasbourg, France. Threedimensional
infrared spectroscopy (3‐D‐IR) of isotopically substituted
liquid water reveals heterogeneous dynamics on the 500‐700 fs
timescale. We attribute this behavior to local differences in the timescale
of hydrogen‐bond network rearrangements.
MG1 • 4:45 p.m. Invited
Ultrafast Magnetism: Coherent Processes and Angular Momentum
Transfer, Jean‐Yves Bigot, Christine Boeglin, Mircea Vomir, Valérie Halté,
Eric Beaurepaire; CNRS, Univ. of Strasbourg, France. Understanding the
induced demagnetization of magnetic metals interacting with
femtosecond laser pulses necessitates taking into consideration the spinorbit
coupling. Here we explore the dynamics of this fundamental
interaction in the presence of the laser field.
MF2 • 5:00 p.m.
Orientational Dynamics of Water Probed with 2‐D‐IR Anisotropy
Measurements, Krupa Ramasesha, Rebecca A. Nicodemus, Aritra Mandal,
Andrei Tokmakoff; MIT, USA. We use polarization‐selective ultrafast 2‐D
IR infrared spectroscopy to probe joint orientational and spectral
dynamics of HOD in D2O. Our experiments show rapid reorientation
concurrent with return of strained hydrogen bonds to a stable
configuration.
MF3 • 5:15 p.m.
Water Dynamics near Hydrophobes: An Ultrafast Infrared
Spectroscopy Study, Artem A. Bakulin1, Christian Petersen2, Huib J.
Bakker2, Maxim S. Pshenichnikov1; 1Univ. of Groningen, Netherlands, 2FOMInst.
for Atomic and Molecular Physics, Netherlands. With 2‐D IR and
polarization‐resolved pump‐probe spectroscopy we observe a strong
slowing‐down of the hydrogen‐bond and orientational dynamics of
water near hydrophobic groups that scales with solute concentration
and the size of the hydrophobic group.
MG2 • 5:15 p.m.
CDW‐Superlattice Suppression Probed in Time‐Resolved XUV
Photoemission at the Border of the Brillouin Zone, Timm Rohwer,
Stefan Hellmann, Martin Wiesenmayer, Christian Sohrt, Ankatrin Stange,
Bartosz Slomski, Lutz Kipp, Kai Rossnagel, Michael Bauer; Christian‐
Albrechts Univ. zu Kiel, Germany. Time‐ and angle‐resolved XUVphotoemission
at the border of the first Brillouin zone is employed to
monitor the ultrafast suppression of a (2x2x2) reconstruction
characteristic for the charge density wave (CDW) phase in 1T‐TiSe2.
MF4 • 5:30 p.m.
Ultrafast Conversions of Hydrogen‐Bonded Structures in Liquid
Water Observed via Femtosecond Soft X‐Ray Spectroscopy, Nils Huse1,
Haidan Wen2, Hana Cho1,3, Tae Kyu Kim3, Robert W. Schoenlein1, Aaron M.
Lindenberg2,4; 1Lawrence Berkeley Natl. Lab, USA, 2SLAC Natl. Accelerator
Lab, USA, 3Pusan Natl. Univ., Republic of Korea, 4Stanford Univ., USA. Xray
spectroscopic studies relate distinct spectral features to water
molecules in lose and tight H‐bond environments. Femtosecond X‐ray
measurements show that vibrational excitation/relaxation increases
weakly H‐bonded water at the direct expense of tightly H‐bonded
water.
MG3 • 5:30 p.m.
Laser Induced CDW Melting in TiSe2 Optical and X‐Ray Time
Resolved Study, Ekaterina Vorobeva1, Steven L. Johnson1, Paul Beaud1, Urs
Staub1, Raquel R. A. De Souza1, Chris J. Milne1,2, Gerhard Ingold1, A. N.
Titov3,4; 1Paul Scherrer Inst., Switzerland, 2École Polytechnique Fédérale de
Lausanne, Switzerland, 3Inst. of Metal Physics, Russian Acad. of Sciences,
Russian Federation, 4Inst. of Metallurgy, Russian Acad. of Sciences, Russian
Federation. Femtosecond laser and X‐ray pump/probe measurements
indicate an ultrafast laser induced structural phase transition in 1TTiSe2,
mediated by an A1g amplitude mode of a CDW.
MF5 • 5:45 p.m.
Hydrogen Bonds in Aqueous Hydrates: Experiment and Theory, Jasper
C. Werhahn1, Stanislav Pandelov1, George S. Fanourgakis2, Hristo Iglev1,
Sotiris S. Xantheas2; 1Technical Univ. of Munich, Germany, 2Pacific Northwest
Natl. Lab, USA. Systematic infrared pump‐probe measurements on
aqueous salt hydrates are combined with theoretical calculations of their
structural and energetical parameters. We establish unambiguous
correlations of the spectral and geometrical parameters of the aqueous
hydrogen bond.
MG4 • 5:45 p.m.
Photo‐Induced Superconductivity in Charge Ordered LESCO (La1.8‐
xEr0.2SrXCuo4, X=0.125) , Daniele Fausti1,2, Raan Tobey3, Nicky Dean3, S.
Pyon4, T. Takayama4, Hidenori Takagi4, Andrea Cavalleri1,3; 1Max‐Plank
Group for Structural Dynamics, Univ. of Hamburg, Germany, 2Dept. of
Physics, Clarendon Lab, Univ. of Oxford, UK, 3Dept. of Physics, Univ. of
Oxford, UK, 4Dept. of Advanced Materials, Univ. of Tokyo, Japan. Photoexcitation
of Cu‐O vibrations with 17 μm wavelength pulses La1.8‐
xEr0.2SrxCuO4 results in a quantum coherent state, revealed by the
presence of a Josephson Plasma Resonance characteristic of layered
superconductors.
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
MF • Water—Continued
MG • Strongly Correlated Materials—Continued
MF6 • 6:00 p.m.
Template‐Substrate Dynamics Studied by 2‐DIR: A Random Merry‐
Go‐Round of Water on a Crown, Martin Olschewski, Stephan Knop, Jaane
Seehusen, Jörg Lindner, Peter Vöhringer; Rheinische Friedrich‐Wilhelms‐Univ.
Bonn, Germany. Femtosecond two‐dimensional infrared spectroscopy in
the OH‐stretching spectral region was used to unravel the ultrafast
hydrogen‐bond recognition dynamics within the prototypical
supramolecular template‐substrate complex of a water molecule and a
crown ether.
MG5 • 6:00 p.m.
Ultrafast Phonon and Quasiparticle Dynamics in Superconducting
YBa2Cu3O7‐δ Studied by Multi‐THz Spectroscopy, Michael Porer1, Alexej
Pashkin1, Markus Beyer1, Kyung Wan Kim1,2, Christian Bernhard2, Xin Yao3,
Yoram Dagan4, Rudi Hackl5, Andreas Erb5, Jure Demsar1,6, Alfred
Leitenstorfer1, Rupert Huber1; 1Dept. of Physics and Ctr. for Applied
Photonics, Univ. of Konstanz, Germany, 2Dept. of Physics, Univ. of Fribourg,
Switzerland, 3Dept. of Physics, Jiao Tong Univ., China, 4School of Physics and
Astronomy, Tel Aviv Univ., Israel, 5Walther‐Meissner‐Inst., Germany,
6Complex Matter Dept., Josef Stefan Inst., Slovenia. We probe the midinfrared
dielectric response of optimally doped YBa2Cu3O7‐δ after 12‐fs
optical excitation to simultaneously trace quasiparticles and specific
lattice modes. Our results identify an extremely non‐thermal regime and
highly selective electron‐phonon coupling.
MF7 • 6:15 p.m.
Mechanism for Indirect Photo‐Ionization of Water Studied by Pump‐
Repump‐Probe Spectroscopy, Hristo Iglev, Martin K. Fischer, Alfred
Laubereau; Technische Univ. München, Germany. Three‐pulse spectroscopy
of water after excitation at 9.2 eV provides clear evidence for novel fast
recombination channel. Comparison with similar data measured after
photodetachment of aqueous hydroxide elucidates the mechanism of
indirect photo‐ionization of water.
MG6 • 6:15 p.m.
Ultrafast Polaron Dynamics in Multiferroic LuFe2O4, J. Lee1, D.
Talbayev1, C. L. Zhang2, X. S. Xu3, S.‐W. Cheong2, A. J. Taylor1, R. P.
Prasankumar1; 1Ctr. for Integrated Nanotechnologies, Los Alamos Natl. Lab,
USA, 2Dept. of Physics and Astronomy, Rutgers Univ., USA, 3Dept. of
Chemistry, Univ. of Tennessee, USA. Temperature‐dependent
femtosecond optical spectroscopy is used to track polaron dynamics in
the spin and charge frustrated system LuFe2O4, revealing the influence
of charge and spin ordering on polaron excitation, redressing, and
coupling to on‐site excitations.
MF8 • 6:30 p.m.
Ultrafast Vibrational Dynamics of Hydrated DNA Studied by Two‐
Dimensional Infrared Spectroscopy, Ming Yang, Łukasz Szyc, Thomas
Elsaesser; Max‐Born‐Inst. für Nichtlineare Optik und Kurzzeitspektroskopie,
Germany. 2‐D infrared spectroscopy separates interacting NH stretching
modes of DNA from OH stretching excitations of its water shell. DNAwater
interactions slow down the structural dynamics of the hydration
shell compared to bulk water.
MG7 • 6:30 p.m.
Photoinduced Dynamics of a Quasi‐1‐D Organic Conductor over a
Range from 10 fs to 100 ps, Ken Onda1, Sho Ogihara1, Jiro Itatani2,
Tadahiko Ishikawa1, Yoichi Okimoto1, Shinya Koshihara1, Xiangfeng Shao3,4,
Yoshiaki Nakano3, Hideki Yamochi3, Gunizi Saito5; 1Tokyo Inst. of
Techonology, Japan, 2Univ. of Tokyo, Japan, 3Kyoto Univ., Japan, 4Lanzhou
Univ., China, 5Meijo Univ., Japan. We studied ultrafast photoinduced
phase transition in the organic conductor (EDO‐TTF)2PF6 using a 10‐fs
broadband pulse and a picosecond narrowband pulse, and revealed the
roles of coherent molecular vibrations and the charge melting process.
6:30 p.m.–7:30 p.m. ME • Poster Session I—Continued, Rooftop Garden
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
Tuesday, July 20, 7:30 a.m.–5:30 p.m. Registration Open, Lobby
TuA • Attosecond Pulse Generation
Tuesday, July 20
8:30 a.m.–10:15 a.m.
Katsumi Midorikawa; RIKEN, Japan, Presider
TuA1 • 8:30 a.m. Invited
High‐Energy Isolated Attosecond Pulses, Matteo Lucchini, Federico Ferrari, Francesca Calegari, Caterina Vozzi, Salvatore Stagira, Giuseppe Sansone, Mauro
Nisoli; Politecnico di Milano, Italy. We demonstrate the generation of isolated sub‐160‐attosecond pulses with on‐target pulse‐energy of a few
nanojoules, thus showing a pulse‐energy enhancement from one to three orders of magnitude compared with the generating methods demonstrated
so far.
TuA2 • 9:00 a.m.
Generation and Optimization of Isolated Attosecond Pulses, Phillip M. Nagel1,2, Thomas Pfeifer3, Mark J. Abel1,2, Marie J. Bell1,2, Hiroki Mashiko1,2,
Annelise R. Beck1,2, Colby P. Steiner1,2, Joseph S. Robinson2, Daniel M. Neumark1,2, Stephen R. Leone1,2; 1Univ. of California at Berkeley, USA, 2Lawrence Berkeley
Natl. Lab, USA, 3Max‐Planck‐Inst. for Nuclear Physics, Germany. Two techniques for generation and optimization of isolated attosecond pulses are
demonstrated experimentally. Ionization gating is used to relax pulse duration and carrier‐envelope phase (CEP) requirements, while CEP‐scanning
enables easy optimization of attosecond pulse contrast.
TuA3 • 9:15 a.m.
Bright, Coherent, Attosecond Soft X‐Ray Harmonics Spanning the Water Window from a Tabletop Source, Ming‐Chang Chen, Paul Arpin, Tenio
Popmintchev, Michael Gerrity, Matt Seaberg, Bosheng Zhang, Dimitar Popmintchev, Alon Bahabad, Margaret Murnane, Henry Kapteyn; JILA, Univ. of Colorado
at Boulder, USA. We generate fully spatially coherent, ultrafast soft X‐ray beams in the water window region of the spectrum using phase matched
high harmonic upconversion of a 2 μm driving laser.
TuA4 • 9:30 a.m.
Interplay between Gdd‐Induced Polarization Gating and Ionization for Isolated Attosecond Pulse Generation from Multi‐Cycle Driving Pulses,
Carlo Altucci1, Raffaele Velotta1, Valer Tosa2, Fabio Frassetto3, Luca Poletto3, Paolo Villoresi3, Caterina Vozzi4, Matteo Negro4, Francesca Calegari4, Sandro De
Silvestri4, Salvatore Stagira4; 1Univ. di Napoli Federico II, Italy, 2Natl. Inst. for R&D Isotopic and Molecular Technologies, Romania, 3Univ. di Padova, Italy,
4Politecnico di Milano, Italy. A new scheme is employed to generate single‐shot XUV continua by 15‐fs 800‐nm pulses. Continua are due to the
formation of a single attosecond pulse and attributed to the interplay between polarization and ionization gating.
TuA5 • 9:45 a.m.
Laser Driven Parametric Amplification of XUV and Soft‐X‐Rays in Neutral Gases, Jozsef Seres1, Enikoe Seres1, Daniel Hochhaus2,3,4, Boris Ecker2,5,6,
Daniel Zimmer2,6, Vincent Bagnoud2, B. Aurand3,5,6, B. Zielbauer2,5,6, Thomas Kuehl2,5, Christian Spielmann1; 1Friedrich‐Schiller‐Univ. Jena, Germany, 2GSI
Helmholtz Ctr. for Heavy Ion Res., Germany, 3EMMI, Extreme Matter Inst., Germany, 4Johann‐Wofgang von Goethe‐Univ., Germany, 5Johannes‐Gutenberg‐
Univ. Mainz, Germany, 6Helmholtz Inst., Germany. We present the first theoretical description and also experimental evidence for the amplification of
XUV and soft‐X‐ray radiation by parametric stimulated emission in neutral gases driven by near‐IR laser pulses reaching small‐signal‐gain up to
8000.
TuA6 • 10:00 a.m.
Using Ion‐Imaging to Study the Effect of Gouy Phase Shift and Wave‐Front Distortions on Attosecond Pump‐Probe Measurements, Niranjan
Shivaram, Adam Roberts, Lei Xu, Arvinder Sandhu; Univ. of Arizona, USA. We utilize ion‐imaging to perform a detailed characterization of the effects of
Gouy phase mismatch and wave‐front distortions on attosecond resolved, pump‐probe measurements of XUV/IR and IR/IR ionization of He and Xe
atoms.
10:15 a.m.–10:45 a.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
10:15 a.m.–4:15 p.m. Exhibits Open, Erickson/Carroll/Sinclair Rooms
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuB • Metamaterials and Plasmonics
Tuesday, July 20
10:45 a.m.–12:30 p.m.
Mark I. Stockman; Georgia State Univ., USA, Presider
TuC • Optical Parametric Amplifiers
Tuesday, July 20
10:45 a.m.–12:30 p.m.
Sandro De Silvestri; Politecnico di Milano, Italy, Presider
TuB1 • 10:45 a.m.
Ultrafast All‐Optical Coupling of Light to Surface Plasmons on Planar
Gold Films, Nir Rotenberg, Markus Betz, Henry M. van Driel; Univ. of
Toronto, Canada. We demonstrate that transient optical gratings
generated by femtosecond near‐infrared pulses can be utilized to couple
visible light into surface plasmon polaritons on thin unstructured gold
films. Pump‐probe experiments reveal a 1.0 ps launch window.
TuC1 • 10:45 a.m.
Demonstration of Cavity‐Enhanced Optical Parametric Chirped‐
Pulse Amplification System at High Repetition Rate, Aleem M.
Siddiqui1, Kyung‐Han Hong1, Jeffrey Moses1, Jian Chen1, F. Ömer Ilday2,
Franz X. Kärtner1; 1MIT, USA, 2Bilkent Univ., Turkey. First experimental
demonstration of cavity‐enhanced OPCPA at 78 MHz with <1 W of
pump power is presented. For comparison, we demonstrated saturated
gain in a single‐pass experiment from 6‐W Yb‐fiber pump and Er‐fiber
signal sources.
TuB2 • 11:00 a.m.
Superconductor Terahertz Metamaterials, Hou‐Tong Chen, Hao Yang,
Quanxi Jia, Antoinette J. Taylor; Los Alamos Natl. Lab, USA. We
demonstrate THz metamaterials comprised of high temperature
superconducting film (YBa2Cu3O7) replacing the metal structure. They
exhibit unique properties that are not achievable using metals, which
may result in both interesting applications and underlying physics.
TuC2 • 11:00 a.m.
96 kHz Fiber‐Amplifier‐Pumped Few‐Cycle Pulse Optical Parametric
Chirped Pulse Amplifier System, Franz Tavella1,2, Arik Willner1, Steffen
Hädrich2,3, Jan Rothhardt2,3, Enrico Seise2,3, Jens Limpert2,3, Stefan
Düsterer1,2, Holger Schlarb1, Josef Feldhaus1,2, Jörg Roßbach1,4, Andreas
Tünnermann2,3,5; 1Deutsches Elektronensynchrontron DESY, Germany,
2Helmholtz‐Inst. Jena, Germany, 3Friedrich‐Schiller‐Univ. Jena, Germany,
4Univ. of Hamburg, Germany, 5Fraunhofer Inst. for Applied Optics and
Precision Engineering, Germany. An optical parametric chirped pulse
amplifier with few‐cycle pulses and high average power is
demonstrated. This is the precursor of a system that will work at
higher average power at the FLASH free electron laser.
TuB3 • 11:15 a.m.
Radiative Coupling in Planar Metamaterials Studied by THz Time‐
Domain Spectroscopy, Hannes P. Merbold1, Andreas Bitzer1, Jan Wallauer2,
Hanspeter Helm2, Markus Walther2, Thomas Feurer1; 1Inst. of Applied Physics,
Univ. of Bern, Switzerland, 2Freiburg Materials Res. Ctr., Univ. of Freiburg,
Germany. We employ near‐ and far‐field measurements of single‐cycle
THz pulses and numerical simulations to investigate the influence of
diffraction in metamaterial arrays. We find that radiative coupling leads
to substantial modifications of the spectral response.
TuC3 • 11:15 a.m.
The Development of Angularly‐Dispersed Non‐Collinear Optical
Parametric Amplifier for Generation of High Power Optical Pulses
in Monocycle Regime, Keisaku Yamane1,2, Takashi Tanigawa1,2, Taro
Sekikawa1,2, Mikio Yamashita1,2; 1Hokkaido Univ., Japan, 2Core Res.
Evolutional Science and Technology, JST, Japan. We greatly improved our
angularly‐dispersed NOPA system and introduced a new stretcher for
seed pulses. Consequently, we achieved the broadest gain bandwidth
ranging from 500 to 1030 nm with output pulse energy of 45 μJ.
TuB4 • 11:30 a.m.
Ultrafast Pump‐Probe Spectroscopy of a Dual‐Band Negative Index
Metamaterial, Keshav M. Dani1, Zahyun Ku2, Prashanth C. Upadhya1, Rohit
P. Prasankumar1, S. R. J. Brueck2, Antoinette J. Taylor1; 1Ctr. for Integrated
Nanotechnologies, Los Alamos Natl. Lab, USA, 2Ctr. for High Technology
Materials, Univ. of New Mexico, USA. We study the nonlinear optical
response of a dual‐band negative‐index metamaterial with two‐color
pump‐probe spectroscopy. We demonstrate the utility of the device as a
nanoscale, structurally tunable, subpicosecond all‐optical modulator.
TuC4 • 11:30 a.m.
6 Cycle, 3.8 μJ, Mid‐IR OPCPA at 100 kHz, Olivier Chalus1, Alexandre
Thai1, Jens Biegert1,2; 1ICFO, Spain, 2ICREA, Spain. A mid‐IR OPCPA
generates 6 cycle pulses (67 fs at 3.1 μm) with compressed energy of 3.8
μJ at 100 kHz. The source is passively CEP stabilized through DFG.
TuB5 • 11:45 a.m.
Terahertz Radiation from Multiplexed Photo‐Dember Currents, Gregor
Klatt1, Florian Hilser1, Wenchao Qiao1, Raphael Gebs1, Albrecht Bartels1, Klaus
Huska2, Uli Lemmer2, Georg Bastian3, Michael B. Johnston4, Milan Fischer5,
Jérôme Faist5, Thomas Dekorsy1; 1Univ. of Konstanz, Germany, 2Univ.
Karlsruhe, Germany, 3Univ. of Applied Sciences Trier, Germany, 4Univ. of
Oxford, UK, 5ETH Zürich, Switzerland. We investigate a novel method to
generate intense THz radiation by multiplexing coherent photo‐Dember
currents in a lateral geometry. These THz emitters are passive devices
with a peak frequency at about 1.5 THz.
TuC5 • 11:45 a.m.
Widely Tunable Infrared Pulse Generation up to 5 μm with Novel
Optical Parametric Amplifiers at 100 kHz Repetition Rate, Maximilian
Bradler, Eberhard Riedle, Christian Homann; LS für BioMolekulare Optik,
Ludwig‐Maximilians‐Univ. München, Germany. Two‐color pumping with
strong pre‐amplification and idler‐seeding is demonstrated for
efficient, broadband, tunable mid‐infrared collinear optical parametric
amplification. It is shown for low pump energies and high repetition
rates, and implemented on various laser systems.
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuB • Metamaterials and Plasmonics—Continued
TuC • Optical Parametric Amplifiers—Continued
TuB6 • 12:00 p.m.
Localizing Few‐Cycle Light Pulses in Space and Time in Random
Dielectric Media, Manfred Mascheck1, Slawa Schmidt1, Martin Silies1,
Parinda Vasa1, David Leipold2, Erich Runge2, Kokoro Kitamura3, Takashi
Yatsui3, Motoichi Ohtsu3, Christoph Lienau1; 1Inst. für Physik, Carl von
Ossietzky Univ., Germany, 2Inst. für Physik und Inst. für Mikro‐ und
Nanotechnologien, Technische Univ. Ilmenau, Germany, 3School of
Engineering, Univ. of Tokyo, Japan. We directly visualize, for the first time,
the weak localization of light in both space and time in a disordered
array of ZnO nanoneedles using a novel diffraction‐limited secondharmonic
microscope with few‐cycle time resolution.
TuC6 • 12:00 p.m. Invited
Cycle‐Engineered Coherent Steering of Electrons with a Multicolor
Optical Parametric Synthesizer, Tadas Balčiūnas1, Giedrius Andriukaitis1,
Aart J. Verhoef1, Oliver D. Mücke1, Audrius Pugžlys1, Andrius Baltuška1,
Darius Mikalauskas2, Linas Giniūnas2, Romualdas Danielius2, Matthias
Lezius3, Ronald Holzwarth3,4; 1Photonics Inst., Vienna Univ. of Technology,
Austria, 2Light Conversion Ltd., Lithuania, 3Max‐Planck‐Inst. of Quantum
Optics, Germany, 4Menlo Systems GmbH, Germany. Directional electron
generation asymmetry is measured using incommensurate‐frequency
multicolor pulses that are carrier‐envelope‐phase‐locked. The
demonstrated Yb‐laser‐pumped OPA technology produces a shot‐toshot‐
stable femtosecond field combining three carrier frequencies that
can be set to an arbitrary ratio.
TuB7 • 12:15 p.m.
Anderson Localization of Single Cycle THz Pulses in Random Media,
Florian Enderli1, Andreas Bitzer1, Frank Scheffold2, Thomas Feurer1; 1Inst. of
Applied Physics, Univ. of Bern, Switzerland, 2Dept. of Physics, Univ. of
Fribourg, Switzerland. We present two approaches based on THz time
domain spectroscopy and polaritonics to visualize Anderson localization
in 2‐D systems. In both femtosecond pump/probe experiments are used
to observe single‐cycle THz‐pulses propagating through random media.
12:30 p.m.–2:00 p.m. Lunch Break (on your own)
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuD • Chemical Reaction Dynamics
Tuesday, July 20
2:00 p.m.–3:45 p.m.
Eberhard Riedle; Ludwig‐Maximilians‐Univ. München, Germany, Presider
TuD1 • 2:00 p.m. Invited
Tracking Ultrafast Chemical Reaction Dynamics Using Transient 2DIR Spectroscopy, Carlos R. Baiz, Robert McCanne, Jessica M. Anna, Kevin J.
Kubarych; Univ. of Michigan, USA. Phototriggered reactions can be monitored in real time with bond‐by‐bond structural selectivity using
multidimensional IR spectroscopy as a probe. We have applied this powerful approach to photoproduct orientational relaxation and geminate
rebinding reactions.
TuD2 • 2:30 p.m.
Ultrafast Spin‐State Conversion in Solvated Transition Metal Complexes Probed with Femtosecond Soft X‐Ray Spectroscopy, Nils Huse1, Hana
Cho1,2, Tae Kyu Kim2, Lindsey Jamula3, James K. McCusker3, Frank M. F. de Groot4, Robert W. Schoenlein1; 1Lawrence Berkeley Natl. Lab, USA, 2Pusan Natl.
Univ., Republic of Korea, 3Michigan State Univ., USA, 4Utrecht Univ., Netherlands. We report the first femtosecond soft X‐ray spectroscopy of solvated
transition‐metal complexes: Structural dynamics mediate ultrafast spin‐state conversion and symmetry‐specific valence‐charge localization. This
study demonstrates the unique potential of ultrafast soft X‐ray spectroscopy in solutions.
TuD3 • 2:45 p.m.
Time‐Resolved X‐Ray Emission Spectroscopy, György Vankó1, Pieter Glatzel2, Van‐Thai Pham3, Rafael Abela4, Daniel Grolimund4, Camelia N. Borca4,
Steven L. Johnson4, Chris Milne3, Wojciech Gawelda5, Andreas Galler5, Christian Bressler5; 1KFKI Res. Inst. for Particle and Nuclear Physics, Hungary, 2KFKI
Res. European Synchrotron Radiation Facility, France, 3École Polytechnique Fédérale de Lausanne, Switzerland, 4Paul‐Scherrer Inst., Switzerland, 5European
XFEL GmbH, Germany. We present ultrafast X‐ray emission studies of photoexcited aqueous iron tris‐bipyridine with 70 ps temporal resolution to
monitor the spin state changes in this spin‐crossover complex.
TuD4 • 3:00 p.m.
Solvated Electron Scavenging by Metal Cations: A Microscopic Picture Derived from the Transient Effect, Uli Schmidhammer1, Pascal Pernot1, Pierre
Jeunesse1, Shigeo Murata2, Mehran Mostafavi1; 1Lab de Chimie Physique, Univ. Paris Sud, France, 2AIST, Japan. The decay of the solvated electron generated
by picosecond electron radiolysis is measured for highly concentrated oxidizers in a viscous solvent. Analyzing the non‐exponential kinetics reveals
molecular parameters of the reaction, particularly its distance distribution.
TuD5 • 3:15 p.m.
Ultrafast Generation of Aqueous Carbonic Acid, Katrin Adamczyk1, Mirabelle Prémont‐Schwarz1, Dina Pines2, Ehud Pines2, Erik T. J. Nibbering1; 1Max‐
Born‐Inst. für Nichtlineare Optik und Kurzzeitspektroskopie, Germany, 2Ben‐Gurion Univ. of the Negev, Israel. We generate carbonic acid, a molecule of
elusive nature, by ultrafast protonation of bicarbonate in aqueous solution, which follows the free energy reactivity correlation known for
carboxylate anions, with an associated pKa‐value of 3.45 ±0.15.
TuD6 • 3:30 p.m.
Molecular Reaction Dynamics of Excited‐State Intramolecular Proton Transfer Revealed by Isotope Dependence, Junghwa Lee, Chul Hoon Kim,
Taiha Joo; Dept. of Chemistry, Pohang Univ. of Science and Technology, Republic of Korea. Deuterium isotope dependence on the excited‐state
intramolecular proton transfer rate and nuclear wave packet motions was investigated by time‐resolved fluorescence. High time resolution reveals
the role of OH stretching motion on the proton transfer reaction.
3:45 p.m.–4:15 p.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
TuE • Poster Session II
Tuesday, July 20, 3:45 p.m.–4:45 p.m. and 6:30 p.m.–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuE1
Soft X‐Ray Interferometer for Time‐Resolved
Diagnostics of Laser‐Aided Nano‐
Fabrication, Tohru Suemoto1, Kota Terakawa1,
Yasuo Minami1, Yoshihiro Ochi2, Noboru
Hasegawa2, Tetsuya Kawachi2, Takuro Tomita3,
Minoru Yamamoto3, Manato Deki3; 1Inst. for Solid
State Physics, Univ. of Tokyo, Japan, 2JAEA,
Japan, 3Univ. of Tokushima, Japan. An
interferometer is constructed utilizing 13.9 nm
radiation from a plasma‐based soft X‐ray
laser. Single‐shot measurement with a timeresolution
of 7 ps is performed to observe the
initial stage of the ablation process in
platinum.
TuE2
Systematic Study of Delay‐Based Adaptive
Coherent Control, Di Yang, Daan P. Sprünken,
Alexander C.W. van Rhijn, Peter van der Walle,
Ting Lee Chen, Herman L. Offerhaus, Jennifer L.
Herek, Aliakbar Jafarpour; Univ. of Twente,
Netherlands. We show five simultaneous
fundamental improvements in adaptive
ultrafast spectroscopy by estimating the group
delay, rather than phase. Numerical results
are confirmed by experiments, and issues such
as generality and noise robustness are studied
quantitatively.
TuE3
High‐Power Wavelength‐Tunable Ti:Sa
Amplifier System for Ultra‐Cold Electron
Generation for Compact FELs, Christoph P.
Hauri, Romain Ganter, Frederic Le Pimpec,
Clemens Ruchert, Alexandre Trisorio; Paul
Scherrer Inst., Switzerland. We demonstrate an
ultra‐stable high‐power Ti:sapphire system
with a tunable central wavelength in the IR
and UV. The laser is used to generate ultracold
electron bunches for driving future
compact Free Electron Lasers.
TuE4
Energy Flow in the Light Harvesting
Complex Manipulated by Pre‐Excitation of
the Energy Accepter, Ryosuke Nakamura1,2,
Takuya Yoshioka1, Kenta Abe1, Shunnsuke Sakai3,
Katsunori Nakagawa2,3, Mamoru Nango2,3, Hideki
Hashimoto2,4, Masayuki Yoshizawa1,2; 1Dept. of
Physics, Graduate School of Science, Tohoku
Univ., Japan, 2JST, CREST, Japan, 3Dept. of Life
and Materials Engineering, Graduate School of
Engineering, Nagoya Inst. of Technology, Japan,
4Dept. of Physics, Graduate School of Science,
Osaka City Univ., Japan. Energy transfer from
carotenoid is partially blocked by preexcitation
of the energy accepter,
bacteriochlorophyll a. By analyzing induced
changes in energy flow, the energy transfer
and competing internal conversion dynamics
in the complexes are elucidated.
TuE5
Coherent Control of Multidimensional
Nonlinear Optical Signals with Shaped Laser
Pulses, Dmitri V. Voronine1, Darius
Abramavicius2, Shaul Mukamel2; 1Univ. Bielefeld,
Germany, 2Univ. of California at Irvine, USA.
Multidimensional nonlinear optical signals
with shaped laser pulses are simulated using
closed‐form expressions that contain pulse
envelopes. Multiparameter coherent control
using linear and higher‐order chirp is applied
to photosynthetic excitons to enhance weak
cross peaks.
TuE6
Ultrafast Proton Transfer in Fluorescent and
Photochromic Proteins, Andras Lukacs1,
Minako Kondo1, Ismael A. Heisler1, Atsushi
Miyawaki2, Hidekazu Tsutsui2, Michael Towrie3,
Gregory Greetham3, Peter J. Tonge4, Deborah
Stoner‐Ma4, Stephen R. Meech1; 1Univ. of East
Anglia, UK, 2Lab for Cell Function Dynamics,
RIKEN, Japan, 3Rutherford Appleton Lab, UK,
4Stony Brook Univ., USA. Transient IR and
ultrafast fluorescence are used to probe
primary processes in two proteins. S65T GFP
exhibits proton transfer on a short H‐bond,
while transient IR probes primary
photochemistry in the optical highlighter
protein kikGR.
TuE7
Structurally‐Sensitive Rebinding Dynamics
of Solvent‐Caged Radical Pairs: Exploring
the Viscosity Dependence, Carlos R. Baiz,
Robert McCanne, Kevin J. Kubarych; Univ. of
Michigan, USA. Solvent‐caged radical
rebinding dynamics are studied using nonequilibrium
2‐D IR and dispersed vibrational
echo spectroscopy.
TuE8
Femtosecond Relaxation Dynamics of Core
and Surface Localized Electronic States in
Au24PdL18, Stephen A. Miller, Christina A.
Fields‐Zinna, Royce W. Murray, Andrew M.
Moran; Univ. of North Carolina at Chapel Hill,
USA. Femtosecond transient grating
spectroscopies probe the relaxation dynamics
of the monolayer protected clusters
Au24Pd(SCH2CH2Ph)18 and
Au25(SCH2CH2Ph)18‐. The signals reveal an
ultrafast internal conversion process between
excited states spatially localized to the core
and semiring moieties.
TuE9
A Peptide Capping Layer over Gold
Nanoparticles, Marco Schade1, Paul M.
Donaldson1, Alessandro Moretto2, Claudio
Toniolo2, Peter Hamm1; 1Inst. of Physical
Chemistry, Univ. of Zürich, Switzerland, 2Inst. of
Biomolecular Chemistry, Padova Unit, CNR,
Dept. of Chemistry, Univ. of Padova, Italy. We
study gold nanoparticles capped with a layer
of helical peptides. Energy transport through
the peptides is initiated by exciting the
plasmon resonance. 2‐D‐IR spectroscopy is
used to gain structural information about the
capping layer.
TuE10
Highly Exergonic Bimolecular Electron
Transfer beyond Marcus Theory, the
Importance of Molecular Structure and
Dynamics, Bernhard Lang1, Katrin Adamczyk2,
Natalie Banerji1, Diego Villamaina1, Jens Dreyer2,
Erik T. J. Nibbering2, Eric Vauthey1; 1Univ. of
Geneva, Switzerland, 2Max‐Born‐Inst. für
Nichtlineare Optik und Kurzzeitspektroskopie,
Germany. The combination of visible and mid
infrared transient absorption yields a direct
insight into structural dynamics and
determination of distinct reaction pathways in
highly exergonic electron transfer, asking for
refinement of existing theories.
TuE11
Femtosecond Fluorescence up‐Conversion
Studies of Electron Injection in Dye
Sensitized Solar Cells, Olivier Bräm, Andrea
Cannizzo, Majed Chergui; École Polytechnique
Fédérale de Lausanne, Switzerland. Short lived
(≤30 fs) fluorescence of RuN719 dye adsorbed
on TiO2 semiconductor substrate shows a ~3
fold decrease in intensity compared to the
non‐injecting Al2O3 substrate, indicative of an
injection time of about 3 fs.
TuE12
Photoswitching Cycle of a Nitro‐Substituted
Spiropyran: Ring‐Opening and Ring‐Closure
Dynamics, Johannes Buback, Martin Kullmann,
Patrick Nuernberger, Ralf Schmidt, Frank
Würthner, Tobias Brixner; Univ. of Wuerzburg,
Germany. We perform pump‐repump‐probe
transient absorption experiments on a
spiropyran‐merocyanine system
demonstrating a complete closed‐form/openform/
closed‐form photoswitching cycle. We
provide first direct experimental proof of
spiropyran‐derived merocyanine ring closure
and measure the ring‐opening dynamics.
TuE • Poster Session II
Tuesday, July 20, 3:45 p.m.–4:45 p.m. and 6:30 p.m.–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuE13
Mapping Chirp Effects on Impulsive
Vibrational Spectroscopy in
Multidimensional Systems, Amir Wand,
Shimshon Kallush, Ofir Shoshanim, Oshrat
Bismuth, Ronnie Kosloff, Sanford Ruhman;
Hebrew Univ. of Jerusalem, Israel. Experiment
and theory applied to a range of polyatomics
map chirp effects on impulsive vibrational
spectroscopy. Pump detuning, solvent
dissipation and mode displacements are
factors determining the optimal chirp, as well
as its inter‐mode dependence.
TuE14
Time‐Domain Raman Tracking of Ultrafast
Flattening Distortion in Organometallic
Complex, Satoshi Takeuchi1, Munetaka
Iwamura2, Hidekazu Watanabe1, Tahei Tahara1;
1RIKEN, Japan, 2Univ. of Toyama, Japan. We
studied vibrational structures of the metal‐toligand‐
charge‐transfer state of Cu(I)‐diimine
complexes through wavepacket motions
generated impulsively at various delay‐times.
The obtained “instantaneous” Raman data
provided firm vibrational evidences for
ultrafast nature of the flattening distortion.
TuE15
Excitation‐Energy Dependence of Ultrafast
Electron Injection from a Model Carotenoid,
Jacquelyn M. Burchfield, Emily J. Glassman,
Graham R. Fleming; Univ. of California at
Berkeley, USA. Energy‐dependent excitation to
the second excited state of β‐apo‐8’‐carotenoic
acid bound to an electron‐accepting
nanoparticle reveals a second decay pathway
allowing electron injection into basic
nanoparticles from a lower‐energy state
available only under high‐energy excitation.
TuE16
Multi‐Dimensional Electronic Spectroscopy
of J‐Aggregates, Dylan H. Arias, Katherine W.
Stone, Keith A. Nelson; MIT, USA. Multidimensional
electronic spectroscopy, via
spatiotemporal pulse‐shaping, is used to study
excitons in J‐aggregates. Correlation spectra
elucidate spectral diffusion while a twoquantum
experiment reveals couplings
between the first and second manifolds of
exciton states.
TuE17
Can Retinal Isomerization in
Bacteriorhodopsin Be Coherently Controlled
in the Strong Field Limit? Valentin I.
Prokhorenko1, Alexei Halpin1, Philip J. M.
Johnson1, Leonid S. Brown2, R. J. Dwayne Miller1;
1Univ. of Toronto, Canada, 2Univ. of Guelph,
Canada. We observe experimentally that the
isomerization efficiency of bacteriorhodopsin
increases by chirping the excitation pulses at
moderate excitation levels. Under strong fields
(>100 GW/cm2), the isomerization becomes
corrupted, most likely from ionization of the
protein.
TuE18
Ultrafast Vibrational Dynamics in Quasi‐
Linear Arrays of Hydrogen‐Bonds Explored
by 2DIR‐Spectroscopy, Stephan Knop1, Jaane
Seehusen1, Jörg Lindner1, Dirk Schwarzer2, Peter
Vöhringer1; 1Rheinische Friedrich‐Wilhelms‐Univ.,
Germany, 2Max‐Planck‐Inst. für Biophysikalische
Chemie, Germany. Femtosecond mid‐infrared
pump‐probe and two‐dimensional
spectroscopy in the OH‐stretching spectral
region was used to elucidate the dynamics of
vibrational energy relaxation and dynamic
line broadening in artificial low‐dimensional
hydrogen‐bond wires of different lengths.
TuE19
Band Filling Dynamics and Auger
Recombination in Lead Sulfide
Nanocrystals, William K. Peters, Byungmoon
Cho, Robert J. Hill, Trevor L. Courtney, David M.
Jonas; Univ. of Colorado at Boulder, USA. Pump
energy dependent pump probe transients
were recorded in lead sulfide nanocrystals.
Band filling dynamics were observed on a
few‐hundred femtosecond timescale followed
by Auger dynamics over tens to hundreds of
picoseconds.
TuE20
Terahertz Radiation with a Continuous
Spectral Bandwidth Reaching beyond 100
THz from a Laser‐Induced Gas Plasma, Volker
Blank, Mark D. Thomson, Hartmut G. Roskos;
Physikalisches Inst., Johann Wolfgang Goethe‐
Univ., Germany. The generation of coherent
terahertz radiation with a spectrum covering
the range from below 1 THz to more than 100
THz is demonstrated, using an air‐plasma
with sub‐20‐fs two‐color optical excitation.
TuE21
Toward Single‐Cycle Pulse Generation in
Single‐Crystal Diamond, Miaochan Zhi, Kai
Wang, Alexei V. Sokolov; Texas A&M Univ.,
USA. We generate a broad band of frequency
sidebands by focusing two infrared beams
non‐collinearly into diamond. We use a pulse
shaper to adjust phases across the spectrum of
3 sidebands and obtain 13 fs pulses.
TuE22
Generation of Ultra‐Short Gamma Ray
Pulses via Laser Compton Scattering in
UVSOR‐II Electron Storage Ring, Yoshitaka
Taira1,2, Masahiro Adachi2,3, Heisyun Zen2,3,
Takanori Tanikawa3, Naoto Yamamoto1, Masato
Hosaka1, Yoshifumi Takashima1, Kazuo Soda1,
Masahiro Katoh1,2,3; 1Graduate School of
Engineering, Nagoya Univ., Japan, 2UVSOR, Inst.
for Molecular Science, Natl. Inst.s of Natural
Sciences, Japan, 3School of Physical Sciences,
Graduate Univ. for Advanced Studies, Japan. We
have generated laser Compton scattering
gamma rays via head‐on and horizontal 90‐
degree collision in an electron storage ring;
this result will provide a tunable ultra‐short
gamma ray pulse source.
TuE23
Polarization Pulse Shaping Using Nonlinear
Optical Processes, Marco T. Seidel, Suxia Yan,
Zhengyang Zhang, Howe‐Siang Tan; School of
Physical and Mathematical Sciences, Nanyang
Technological Univ., Singapore. We demonstrate
a scheme for mid infrared polarization pulse
shaping by using two perpendicularly
oriented nonlinear optical processes in a nearinterferometric
stable beam geometry. This
method can be generalized to produce
ultraviolet polarization shaped pulse.
TuE24
The Evolution of Signal‐to‐Noise Ratio in
Superfluorescence‐Contaminated Optical
Parametric Chirped‐Pulse Amplification,
Cristian Manzoni1, Jeffrey Moses2, Franz X.
Kärtner2, Giulio Cerullo1; 1Politecnico di Milano,
Italy, 2MIT, USA. Using a numerical model
consistent with quantum mechanics, we study
the evolution of signal‐to‐noise ratio in
chirped‐pulse parametric amplification with
significant quantum‐noise contamination. For
realistic amplifier parameters, noise
performance can have order‐of‐magnitude
dependence on design.
TuE • Poster Session II
Tuesday, July 20, 3:45 p.m.–4:45 p.m. and 6:30 p.m.–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuE25
Measuring Time Profiles of Ultraweak
Ultrashort Pulses by Time Domain
Superresolution, Osip Schwartz, Oren Raz, Ori
Katz, Nirit Dudovich, Dan Oron; Dept. of Physics
of Complex Systems, Weizmann Inst. of Science,
Israel. We demonstrate an optical nonlinearity
free ultrashort pulse characterization
technique relying on spectral component
localization in time domain. Ultraweak pulses
in NIR to XUV range can be characterized
with resolution depending only on integration
time.
TuE26
Single‐Shot Detection and Stabilization of
Carrier Phase Drifts of Mid‐IR Pulses,
Cristian Manzoni, Michael Först, Henri Ehrke,
Matthias C. Hoffmann, Andrea Cavalleri; Max‐
Planck Res. Group for Structural Dynamics, Univ.
of Hamburg, Germany. We introduce a new
scheme for single‐shot characterization of the
absolute‐phase jitter of mid‐IR pulses. The
system detects phase drifts of self‐phase
stabilized sources; a control scheme
compensating long‐term drifts is also
demonstrated.
TuE27
Ultrabroadband Optical Parametric Chirped‐
Pulse Amplifier in the Mid‐Infrared Using
Aperiodically Poled Mg:LiNbO3 , Clemens
Heese1, Christopher R. Phillips2, Lukas Gallmann1,
Martin M. Fejer2, Ursula Keller1; 1ETH Zürich,
Switzerland, 2Stanford Univ., USA. We present a
new approach to amplification of few‐cycle
laser pulses in the mid‐infrared spectral region
using diode‐pumped solid‐state lasers. At 100‐
kHz repetition rate pulse energies of 1.5‐μJ
and and durations of 75‐fs are generated.
TuE28
Generation and Characterization of Phase
and Amplitude Modulated Femtosecond UV
Pulses, Jens Möhring, Tiago Buckup, Marcus
Motzkus; Univ. Heidelberg, Germany. To enable
flexible generation of femtosecond UV pulses
in time resolved experiments we present a
novel setup capable of generation, direct UV
phase modulation and shaper assisted
characterization of phase and amplitude
modulated UV pulses.
TuE29
Mode‐Locking of an Er:Yb:Glass Laser with
Single Layer Graphene, Chien‐Chung Lee,
Guillermo Acosta, Scott Bunch, Thomas R. Schibli;
Univ. of Colorado, USA. Pulses as short as 260fs
have been generated in an Er:Yb:glass laser by
saturable absorber mode‐locking using
graphene as the only mode‐locking
mechanism. These novel saturable absorbers
present a low‐cost, ultra‐broadband
alternative to traditional SESAMs.
TuE30
Characterization of an Asynchronously
Mode‐Locked Erbium‐Doped Fiber Laser
Operating at 10GHz, Camila C. Dias, Eunezio
A. De Souza; Univ. Presbiteriana Mackenzie,
Brazil. We investigated the dynamic operation
of an asynchronous mode‐locking EDFL at
10GHz as a deviation from the synchronous
regime. We observed that the soliton shifts the
central wavelength speeding up to stabilize
the asynchronous mode‐locking.
TuE31
Tunable Broadband Optical Generation via
Giant Rabi Shifting in Micro‐Plasmas, Ryan
Compton, Alex Filin, Dmitri A. Romanov,
Mateusz Plewicki, Robert J. Levis; Temple Univ.,
USA. A new coherent laser‐source arising
from giant time‐dependent generalized Rabi
shifting has been demonstrated. A 1 ps laser is
transformed into a pulse with bandwidth
corresponding to a 70 fs pulse via timedependent
Rabi shifting.
TuE32
Electron‐Energy Resolved Measurement of
the Cascaded Auger Decay in Krypton, Aart J.
Verhoef1, Alexander Mitrofanov1, Xuan Trung
Nguyen1, Maria Krikunova2, Nikolay Kabachnik2,
Markus Drescher2, Andrius Baltuška1; 1Vienna
Univ. of Technology, Austria, 2Univ. Hamburg,
Germany. The cascaded Auger decay following
excitation with 92‐eV soft‐X‐ray pulses from
the 3p‐subshell in Krypton has been energyand‐
time‐resolved for the first time. The decay
time of the 4s‐14p‐1np→4p‐2+e transition is
measured to be 50±10 fs.
TuE33
Ultrafast, Element‐Specific, Demagnetization
Dynamics Probed Using Coherent High
Harmonic Beams, Stefan Mathias1,2, Chan La‐OVorakiat1,
Patrik Grychtol3, Roman Adam3, Mark
Siemens1, Justin M. Shaw4, Hans Nembach5,
Martin Aeschlimann2, Claus M. Schneider3, Tom
Silva5, Margaret M. Murnane1, Henry C.
Kapteyn1; 1JILA, Univ. of Colorado, USA, 2Univ.
of Kaiserslautern, Germany, 3Inst. of Solid State
Res., Res. Ctr. Jülich, Germany, 4Electromagnetics
Div., USA, 5NIST, USA. High harmonics from
a tabletop laser are used to probe ultrafast
demagnetization of a compound material
(Permalloy) with elemental selectivity. We
achieve the highest time resolution, elementspecific,
measurements to date at 55 fs.
TuE34
Elliptical Dichroism of High Harmonics
Emitted from Aligned Molecules, Robynne M.
Lock, Xibin Zhou, Margaret M. Murnane, Henry
C. Kapteyn; JILA and Dept. of Physics, Univ. of
Colorado, USA. By analyzing the polarization
of harmonics emitted by aligned molecules
driven by elliptically‐polarized driving laser
fields, we observe a structure‐dependent
dichroism. This suggests that electron
dynamics within the molecule influence high
harmonic generation.
TuE35
Degree‐of‐Alignment Dependence of High‐
Order Harmonic Generation from CO2
Molecules, Kosaku Kato, Shinichirou Minemoto,
Hirofumi Sakai; Dept. of Physics, Graduate School
of Science, Univ. of Tokyo, Japan. Degree‐ofalignment
dependence of high‐order
harmonic generation from CO2 molecules
shows that the harmonic orders at which the
harmonic intensities are suppressed due to
destructive interference remain almost same
orders irrespective of different degrees of
alignment.
TuE36
Manipulating the Dissociation of H2 (D2) by
Phase‐Stable Laser Pulses, Manuel H. Kremer1,
Bettina Fischer1, Bernold Feuerstein1, Vitor L. B.
de Jesus2, Vandana Sharma1, Christian Hofrichter1,
Artem Rudenko3, Uwe Thumm4, Claus Dieter
Schröter1, Robert Moshammer1, Joachim Ullrich1;
1Max‐Planck‐Inst. für Kernphysik, Germany,
2Inst. Federal de Educação, Ciência e Tecnologia do
Rio de Janeiro (IFRJ), Brazil, 3Max‐Planck
Advanced Study Group at CFEL, Germany, 4James
R. Macdonald Lab, Kansas State Univ., USA.
Fully differential data on H2 (D2)‐dissociation
in carrier‐envelope‐phase (CEP)stabilized 6fs
laser pulses were recorded with a reaction
microscope. By varying the CEP control over
the proton emission direction, and, thus, the
charge localization was achieved.
TuE37
IR‐Assisted Ionization of He+/He++ by
Attosecond Extreme Ultraviolet (EUV)
Radiation, Predrag Ranitovic, C. W. Hogle, X.
Zhou, M. M. Murnane, H. C. Kapteyn; JILA,
Univ. of Colorado, USA. High harmonics, in
form of attosecond pulse trains, are used to
coherently excite He*/He*+ states just below the
He+/He++ ionization threshold. IR‐induced He+
yield shows evidence of sub‐cycle modulation
of atomic stark shift.
TuE • Poster Session II
Tuesday, July 20, 3:45 p.m.–4:45 p.m. and 6:30 p.m.–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuE38
Ultrafast Coherent Phonon Dynamics in
Metallic Single‐Walled Carbon Nanotubes,
Keiko Kato, Atsushi Ishizawa, Katsuya Oguri,
Hideki Gotoh, Hidetoshi Nakano, Tetsuomi
Sogawa; NTT Basic Res. Labs, NTT Corp., Japan.
We report the first observation of coherent
phonons in separated metallic single‐walled
carbon nanotubes (SWCNTs). Due to
structure‐dependent electron‐phonon
couplings, radial breathing phonon mode is
hardened with photo‐carriers in metallic but
not in semiconducting SWCNTs.
TuE39
Dynamics of Spin‐Lattice Relaxation in
CoxFe3‐xO4Nanocrystals, Tai‐Yen Chen, Chih‐
Hao Hsia, Hsiang‐Yun Chen, Dong Hee Son;
Texas A&M Univ., USA. Spin‐lattice relaxation
rates in colloidal CoxFe3‐xO4 nanocrystals were
investigated as a function of size and Co
content via pump‐probe Faraday rotation
measurements to investigate spin‐lattice
relaxation rate in nanoscale magnetic
materials.
TuE40
Dynamic Electron Molecular Vibration
(EMV) Interference during Photoinduced
Metallization in Charge Ordered Organic
Salt, Yohei Kawakami1, Takeshi Fukatsu1,
Hirotake Itoh1,2, Shinichiro Iwai1,2, Takahiko
Sasaki2,3, Kaoru Yamamoto4, Kyuya Yakushi4;
1Dept. of Physics, Tohoku Univ., Japan, 2JST,
CREST, Japan, 3Inst. for Materials Res., Tohoku
Univ., Japan, 4Inst. for Molecular Science, Japan.
Interference between intermolecular electronic
oscillation (period; 18 fs) and intramolecular
vibration (22 fs) shows that excited state is
initially dressed by the C=C vibration during
the photoinduced insulator to metal transition
in layered organic salt.
TuE41
Motional Narrowing of Phonon Spectrum
Driven by Ultrafast Dielectric Fluctuation in
Organic Dimer Mott Insulator, Keisuke Itoh1,
Hideki Nakaya1, Yohei Kawakami1, Takeshi
Fukatsu1, Hirotake Itoh1,2, Shinichiro Iwai1,2,
Takahaiko Sasaki2,3, Shingo Saito4; 1Dept. of
Physics, Tohoku Univ., Japan, 2JST, CREST,
Japan, 3Inst. for Materials Res., Tohoku Univ.,
Japan, 4NICT, Japan. Motional narrowing of
phonon spectrum was observed in organic
dimer Mott insulator, reflecting ultrafast
dielectric fluctuation which is driven by flip of
the dimer dipole. Moreover, this phonon is
coherently induced by the electronic
excitation.
TuE42
Dynamics of Coherent Phonons in
Disordered Graphite, Ikufumi Katayama1, Sho
Koga1, Toru Shimada2, Keiko Kato3, Shunichi
Hishita3, Daisuke Fujita3, Jun Takeda1, Masahiro
Kitajima4; 1Yokohama Natl. Univ., Japan, 2Free
Univ. of Berlin, Germany, 3Natl. Inst. of Materials
Science, Japan, 4Natl. Defense Acad., Japan. Highfrequency
coherent phonons in Ar+‐implanted
graphite have been investigated with a 7.5 fs
Ti:sapphire laser and electro‐optic sampling
method. Coherent oscillations of G‐ and Dmodes
are clearly observed with timedependent
frequency‐shifts.
TuE43
Femtosecond Coherent Vibrational
Relaxation in PVA Film Detected by
Coherent Anti‐Stokes Raman Spectroscopy,
Takanori Kozai, H. Miyagawa, N. Tsurumachi, S.
Koshiba, S. Nakanishi, H. Itoh; Kagawa Univ.,
Japan. Coherent vibrational relaxation is
investigated for CH and OH stretch modes in
PVA film by femtosecond coherent anti‐Stokes
Raman spectroscopy. The vibrational
relaxation for CH mode is found faster than
that for OH mode.
TuE44
Two‐Dimensional Electronic Coherently
Controlled Spectroscopy Reveals Long‐Lived
Induced Phase Memory, Valentin I.
Prokhorenko, Alexei Halpin, R. J. Dwayne Miller;
Univ. of Toronto, Canada. Using phase‐shaped
excitation pulses we measured 2‐D electronic
spectra of an organic dye and found that the
specific pulse shapes affects the 2‐D profiles
even at very long waiting times (up to 100 ps).
TuE45
Dynamics of Carriers and the Influence of
the Quantum Confined Stark Effect in
ZnO/ZnMgO Quantum Wells , Christopher R.
Hall1, Lap V. Dao1, K. Koike2, S. Sasa2, H. H. Tan3,
M. Inoue2, Mitsuaki Yano2, Chenupatti Jagadish3,
Jeffrey A. Davis1; 1Swinburne Univ. of
Technology, Australia, 2Osaka Inst. of Technology,
Japan, 3Australian Natl. Univ., Australia. We
reveal the dynamics of carrier‐induced
screening of the internal electric field in ZnO
quantum wells. By controlling the potential
profile of the quantum wells we demonstrate
the ability to tune the excited state lifetimes.
TuE46
Interplay between the Electronic and Lattice
Parts of the Order Parameter in a 1‐D Charge
Density Wave System Probed by
Femtosecond Spectroscopy, Hanjo Schäfer1,
Viktor Kabanov2,3, Markus Beyer1, Katica
Biljakovic4, Jure Demsar1,3; 1Univ. Konstanz,
Germany, 2Univ. Konstanz, Slovenia, 3Jozef Stefan
Inst., Slovenia, 4Inst. of Physics, Croatia. Utilizing
the time‐dependent‐Ginzburg‐Landau model
we show that numerous phonon modes
appearing below critical‐temperature in a onedimensional
charge‐density‐wave originate
from linear coupling of the electronic part of
the order parameter to the phonons at
modulation wavevector.
TuE47
30‐fs Hole‐Transfer Dynamics in
Polymer/PCBM Bulk Heterojunction, Artem
A. Bakulin1, Jan C. Hummelen2, Paul H. M. van
Loosdrecht1, Maxim S. Pshenitchnikov1; 1Zernike
Inst. for Advanced Materials, Univ. of Groningen,
Netherlands, 2Stratingh Inst. for Chemistry, Univ.
of Groningen, Netherlands. Methanofullerene
PCBM is used in the majority of modern
plastic photovoltaic devices. Using visible‐IR
ultrafast spectroscopy we resolve the 30‐fs
hole‐transfer following PCBM excitation and
show that PCBM exciton harvesting depends
on the blend morphology.
TuE48
The Effect of Pulse Chirp on Two‐
Dimensional Fourier Transform Spectra,
Patrick F. Tekavec, Jeffrey A. Myers, Kristin L. M.
Lewis, Franklin Fuller, Jennifer P. Ogilvie; Univ.
of Michigan, USA. We investigate the effect of
pulse chirp on the shape of absorptive 2‐D
electronic spectra. We present calculations on
a model system as well as experimental results
on an organic dye molecule.
TuE49
Spin Dynamics Excited with Mid‐Infrared
Femtosecond Laser Pulses, Amani Zagdoud,
Mircea Vomir, Michele Albrecht, Marie
Barthelemy, Jean‐Yves Bigot; Univ. de Strasbourg,
France. We have studied the spins and charges
dynamics of ferromagnetic thin films excited
with ultra‐short mid‐infrared laser pulses. We
show that the demagnetization still occurs
even for small perturbations around the Fermi
level.
TuE • Poster Session II
Tuesday, July 20, 3:45 p.m.–4:45 p.m. and 6:30 p.m.–7:30 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuE50
Coherent Phonons in Oxide Superlattices
Observed by Optical and X‐Ray Pump‐Probe
Techniques, Marc Herzog1, Roman Shayduk2,
Wolfram Leitenberger1, Renske M. van der Veen3,4,
Christopher J. Milne3,4, Steven L. Johnson3, Ionela
Vrejoiu5, Marin Alexe5, Dietrich Hesse5, Matias
Bargheer1; 1Univ. of Potsdam, Germany,
2Helmholtz‐Zentrum Berlin für Materialien und
Energie GmbH, Germany, 3Paul Scherrer Inst.,
Switzerland, 4École Polytechnique Fédérale de
Lausanne, Switzerland, 5Max‐Planck‐Inst. für
Mikrostrukturphysik, Germany. We investigated
the generation and propagation of coherent
phonons in an oxide superlattice of SrRuO3
and SrTiO3. The rich dynamics resulted in
drastic modulations of various Bragg peaks on
a 1‐ps timescale.
TuE51
The Structural Evolution of Photochromic
Reaction in Spirooxazine Traced with Sub‐
40fs Transient Absorption Spectroscopy, R.
Sai Santosh Kumar1, Larry Lüer2, Guglielmo
Lanzani1; 1Ctr. for Nano Science and Technology,
Politecnico di Milano, Italy, 2Madrid Inst. for
Advanced Studies, IMDEA Nanociencia, Spain.
Using sub‐40fs transient absorption
spectroscopy we trace the structural evolution
of a substituted photochromic spirophenanthro‐
oxazine molecule from the
spectral changes in the time domain, and by
studying coherent oscillations in the frequency
domain.
TuE52
Momentum Imaging of Three‐Body
Fragmentation Pathways in Polyatomic
Molecules, Li Zhang1, Stefan Roither1, Xinhua
Xie1, Daniil Kartashov1, Atshushi Iwasaki2,
Huailiang Xu2, Markus Schöffler3, Georg Reider1,
Reinhard Dörner3, Kaoru Yamanouchi2, Andrius
Baltuška1, Markus Kitzler1; 1Photonics Inst.,
Vienna Univ. of Technology, Austria, 2Dept. of
Chemistry, School of Science, Univ. of Tokyo,
Japan, 3Inst. für Kernphysik, J. W. Goethe Univ.
Frankfurt, Germany. Using coincidence
momentum spectroscopy we show that the
external laser field’s properties driving the
internal molecular dynamics have negligible
influence on the decision to follow a given
fragmentation pathway in three‐body
fragmentation of polyatomic molecules.
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuF • Shaped Pulses
Tuesday, July 20
4:45 p.m.–6:30 p.m.
Marcus Motzkus; Philipps Univ. Marburg, Germany, Presider
TuG • Transient Biomolecular Structures
Tuesday, July 20
4:45 p.m.–6:30 p.m.
Peter Hamm; Univ. Zürich, Switzerland, Presider
TuF1 • 4:45 p.m.
High‐Finesse Dispersion‐Free Cavities for Broadband Filtration of
Laser Comb Lines, Li‐Jin Chen1, Guoqing Chang1, Chih‐Hao Li2, Alex
Glenday2, Andrew J. Benedick1, David F. Phillips2, Ronald L. Walsworth2,
Franz X. Kärtner1; 1MIT, USA, 2Harvard‐Smithsonian Ctr. for Astrophysics,
Harvard Univ., USA. Dispersion‐free cavities using dielectric mirrors with
complementary dispersion are proposed for broadband filtration of laser
comb lines. The technique enables us to implement a green astro‐comb
with 40GHz spacing for calibration of astronomical spectrographs.
TuG1 • 4:45 p.m.
Light‐Switchable HTI‐Peptides: Ultrafast Structural Changes and
Coupling between the Electronically Excited Chromophore and
Amide Groups, Nadja Regner1, Teja T. Herzog1, Karin Haiser1, Christian
Hoppmann2, Jörg Sauermann3, Karola Rueck‐Braun2, Martin Engelhard3,
Thorben Cordes1,4, Wolfgang Zinth1; 1Ludwig‐Maximilians‐Univ., Germany,
2Technische Univ. Berlin, Germany, 3Max‐Planck‐Inst. for Molecular
Physiology, Germany, 4Dept. of Physics and Biological Physics, Univ. of
Oxford, UK. Hemithioindigo (HTI) is used as a structural trigger for
attached peptides. Ultrafast, directly driven and slower, allosteric
structural changes are induced by the HTI switch. Pronounced
electronic interactions occur between the HTI and amino acids.
TuF2 • 5:00 p.m.
Grism‐Based Pulse Shaper for Line‐by‐Line Control of More than 600
Comb Lines, Matthew S. Kirchner1,2, Scott A. Diddams2; 1Univ. of Colorado,
USA, 2NIST, USA. We construct a line‐by‐line pulse shaper using a grism
dispersive element and achieve control of over six hundred 21 GHz comb
lines. The 13.4 THz bandwidth is the largest ever controlled in a line‐byline
manner.
TuG2 • 5:00 p.m.
Mapping GFP Structural Evolution during Excited‐State Proton
Transfer with Femtosecond Stimulated Raman, Chong Fang, Renee R.
Frontiera, Rosalie Tran, Richard A. Mathies; Univ. of California at Berkeley,
USA. We use femtosecond stimulated Raman spectroscopy to view
transient structural changes of the photoexcited GFP‐chromophore,
identifying low‐frequency ring‐wagging motions that gate excited‐state
proton transfer. Mechanistic insights on reactive systems require
structural probing with femtosecond resolution.
TuF3 • 5:15 p.m.
Programmable High Resolution Broadband Pulse Shaping Using a 2‐D
VIPA‐Grating Pulse Shaper with a Liquid Crystal on Silicon (LCOS)
Spatial Light Modulator, V. R. Supradeepa, Daniel E. Leaird, Andrew M.
Weiner; Purdue Univ., USA. We demonstrate programmable spectral
shaping with simultaneous broad‐bandwidth(>40nm) and highresolution(<
4GHz) using a 2‐D VIPA‐Grating pulse‐shaper with a LCOS
SLM. The apparatus is capable of scaling to bandwidths of 100s of nm
with sub‐GHz resolution.
TuG3 • 5:15 p.m.
Excited State Dynamics in Variable‐Length DNA A Tracts Reflect
Base Stacking Disorder and Not Exciton Delocalization, Charlene Su1,
Bern Kohler2; 1Ohio State Univ., USA, 2Montana State Univ., USA. Excited
states in single‐stranded all‐adenine oligonucleotides decay to longlived
charge transfer states if the bases are well stacked, while poor
base stacking found near the ends of the strand leads to monomer‐like
nonradiative decay.
TuF4 • 5:30 p.m.
Shaped Sub‐20 fs UV Pulses: Handling Spatio‐Temporal Coupling,
Nils Krebs, Rafael A. Probst, Eberhard Riedle; LS für BioMolekulare Optik,
Ludwig‐Maximilians‐Univ. München, Germany. Based on acousto‐optical
shaping performed directly in the UV spectral range, we demonstrate
that correct beam focusing is essential to get fully wavelength tunable,
nearly Fourier limited as well as complex structured sub‐20 fs pulses.
TuG4 • 5:30 p.m.
Distinguishing between Two and Three‐State Equilibrium Folding
with Three‐Pulse Photon Echo Peak Shift (3PEPS) Spectroscopy,
Zhaochuan Shen1, Emily Gibson2, Ralph Jimenez1; 1JILA, NIST, Univ. of
Colorado, USA, 2Dept. of Physics, Univ. of Colorado, USA. We investigate
the equilibrium unfolding of Zn‐cytochrome c by three‐pulse photon
echo peak shift spectroscopy. The wavelength dependence of the
asymptotic peak shift reveals a bimodal inhomogeneous distribution
function characteristic of two‐state unfolding.
TuF5 • 5:45 p.m.
Linear Characterization of Ultrafast Nonlinear Spatiotemporal
Dynamics, Daniel E. Adams1, Thomas A. Planchon2, Jeff A. Squier1, Charles
G. Durfee1; 1Colorado School of Mines, USA, 2Howard Hughes Medical Inst.,
USA. We use time‐domain Spatially and Spectrally Resolved
Interferometry (SSRI) to characterize nonlinear lensing, cross‐polarized
wave generation and ionization induced defocusing. SSRI yields t‐ and
ω‐dependent wavefronts and can measure ultrafast material response.
TuG5 • 5:45 p.m.
Picosecond Time‐Resolved Resonance Raman Investigation of
Primary Structural Transition of the Heme Induced by Nitric Oxide
Rebinding, Sergei G. Kruglik1,2, Byung‐Kuk Yoo1, Stefan Franzen3, Marten
H. Vos2, Jean‐Louis Martin1,3, Michel Negrerie1; 1Lab dʹOptique et
Biosciences, École Polytechnique, France, 2Lab Acides Nucléiques et
Biophotonique, Univ. Pierre et Marie Curie, France, 3North Carolina State
Univ., USA. We probed the heme iron motion for several proteins,
measuring the evolution of the iron‐histidine Raman intensity in
picosecond range. The movement of the iron towards the planar heme
after nitric oxide binding is retarded.
Anderson Room Hoaglund Room
17th International



Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
TuF • Shaped Pulses—Continued
TuG • Transient Biomolecular Structures—Continued
TuF6 • 6:00 p.m.
Coherent Control of a Single Molecule, Daan Brinks1, Fernando D.
Stefani2, Florian Kulzer3, Richard Hildner1, Niek F. van Hulst1,4; 1ICFO, Spain,
2Univ. de Buenos Aires, Argentina, 3Univ. Lyon 1, France, 4ICREA, Spain.
Coherent control of single molecules at room‐temperature is exploited to
investigate conformational disorder between chemically identical
molecules. Highly efficient control is achieved by adapting the excitation
field to each specific molecule in its local nano‐environment.
TuG6 • 6:00 p.m.
Ultrafast Multidimensional Infrared Spectroscopy of Transient
Structures ‐ New Insights into the FeFe [Hydrogenase] Enzyme
Reaction Mechanism, Gerald M. Bonner1, Andrew I. Stewart1, Joseph A.
Wright2, Spyridon Kaziannis1, Stefano Santabarbara1, Ian P. Clark3, Gregory
M. Greetham3, Michael Towrie3, Anthony W. Parker3, Christopher J. Pickett2,
Neil T. Hunt1; 1Univ. of Strathclyde, UK, 2Univ. of East Anglia, UK, 3STFC
Rutherford Appleton Lab, UK. The structures of intermediate species
pertaining to the reaction mechanism of the FeFe[hydrogenase] enzyme
are investigated using ultrafast transient‐2‐D‐IR and pump‐probe
methods. 2‐D‐IR spectroscopy provides additional insights into the
vibrational dynamics of the active site.
TuF7 • 6:15 p.m.
Coherent Raman Microscopy with a Fiber‐Format Femtosecond Laser
Oscillator, Alessio Gambetta, Vikas Kumar, Giulia Grancini, Dario Polli,
Cristian Manzoni, Roberta Ramponi, Giulio Cerullo, Marco Marangoni;
Politecnico di Milano, Italy. A novel highly simplified architecture for
Coherent Raman Scattering microscopy (CARS and SRS) is
demonstrated, where multiple tunable narrowband picosecond pulses
are generated by spectral compression of femtosecond pulses emitted by
a compact Er‐fiber oscillator.
TuG7 • 6:15 p.m.
Protein Structure Determination in Complex Environments Using 2‐
D IR Spectroscopy, Chris T. Middleton, Ann Marie Woys, Yu‐Shan Lin,
Allam S. Reddy, Wei Xiong, Juan J. de Pablo, James L. Skinner, Martin Zanni;
Univ. of Wisconsin at Madison, USA. We apply isotope labelling,
molecular dynamics simulations and 2‐D IR spectroscopy to the
membrane bound antibiotic peptide ovispirin. From the 2‐D lineshapes,
we ascertained the peptide secondary structure and orientation in the
bilayer.
6:30 p.m.–7:30 p.m. TuE • Poster Session II—Continued, Rooftop Garden
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
Wednesday, July 21, 8:00 a.m.–5:00 p.m. Registration Open, Lobby
WA • Optical Antennas and Nanosystems
Wednesday, July 21
8:30 a.m.–10:15 a.m.
Keith Nelson; MIT, USA, Presider
WA1 • 8:30 a.m. Invited
High Harmonics Generation by Plasmonic Resonance of Metal Nanostructures and Its Applications, Seung‐Woo Kim, Joonhee Choi, Seungchul Kim,
In‐Yong Park; KAIST, Republic of Korea. 3‐D nanostructures are designed and tested as the plasmonic waveguide to enhance the incident femtosecond
laser for the high harmonics generation of EUV radiation.
WA2 • 9:00 a.m.
Deterministic Control of Subwavelength Field Localization in Plasmonic Nanoantennas, Martin Aeschlimann1, Michael Bauer2, Daniela Bayer1, Tobias
Brixner3, Stefan Cunovic4, Alexander Fischer1, Pascal Melchior1, Walter Pfeiffer4, Martin Rohmer1, Christian Schneider1, Christian Strüber4, Philip Tuchscherer3,
Dmitri V. Voronine4; 1Univ. of Kaiserslautern, Germany, 2Univ. Kiel, Germany, 3Univ. Würzburg, Germany, 4Univ. Bielefeld, Germany. Subwavelength
photoemission localization and switching in plasmonic bowtie nanoantennas is achieved experimentally. Analytic and adaptive control schemes are
investigated, and agreement between both approaches is demonstrated.
WA3 • 9:15 a.m.
Strong‐Field Photoelectron Emission From Metal Nanostructures, Reiner Bormann, Max Gulde, Alexander Weismann, Sergey Yalunin, Claus Ropers;
Univ. of Göttingen, Germany. Photoelectron emission from metallic nanotips is studied experimentally and theoretically in the strong‐field regime. The
passage from multiphoton to tunnel emission is clearly resolved, and explained in terms of a one‐dimensional quantum mechanical treatment.
WA4 • 9:30 a.m.
Terahertz Near‐Field Imaging of Electric and Magnetic Resonances in Plasmonic High Frequency Devices, Andreas Bitzer1,2, Jan Wallauer1, Hannes
Merbold2, Florian Enderli2, Thomas Feurer2, Hanspeter Helm1, Markus Walther1; 1Univ. of Freiburg, Germany, 2Univ. of Bern, Switzerland. We report a
terahertz near‐field imaging approach providing spatially resolved measurements of amplitude, phase, and polarization of the electric field. Using
this approach we extract the microscopic near‐field signatures in plasmonic devices and planar metamaterials.
WA5 • 9:45 a.m.
Few‐Femtosecond Time‐Domain Optical Response Function Reconstruction of a Plasmonic Nanostructure, Xiaoji G. Xu1, Kseniya S. Deryckx1,
Alexandria Anderson1, Günter Steinmeyer2, Markus Raschke1; 1Univ. of Washington, USA, 2Max‐Born‐Inst. für Nichtlineare Optik und Kurzzeitspektroskopie,
Germany. Femtosecond plasmonic response function of individual metallic nanostructures is obtained with precise phase and amplitude from
second‐harmonic correlation measurement and spectrogram analysis. Dephasing rate of τ = 20 fs at the Drude limit is obtained.
WA6 • 10:00 a.m.
Few‐Cycle Nonlinear Optics with Single Plasmonic Nanoantennas, Tobias Hanke, Günther Krauss, Daniel Träutlein, Alfred Leitenstorfer, Rudolf
Bratschitsch; Dept. of Physics and Ctr. for Applied Photonics, Univ. of Konstanz, Germany. Optical antennas are excited resonantly with sub‐10‐fs pulses in
the near infrared. Intense third harmonic emission allows measurement of a sub‐cycle plasmon dephasing time of 2 fs, demonstrating efficient
radiation coupling of these broadband nanodevices.
10:15 a.m.–10:45 a.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
10:15 a.m.–4:15 p.m. Exhibits Open, Erickson/Carroll/Sinclair Rooms
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
WB • Molecular Electron Correlation
Wednesday, July 21
10:45 a.m.–12:30 p.m.
Graham R. Fleming; Lawrence Berkeley Natl. Lab, USA, Presider
WC • Novel Ultrafast Techniques
Wednesday, July 21
10:45 a.m.–12:30 p.m.
Thomas Feurer; Univ. of Bern, Switzerland, Presider
WB1 • 10:45 a.m.
Selective Nonlinear Response‐Preparation in the Electronic Ground‐
State by Means of Degenerate Four‐Wave‐Mixing, Jan P. Kraack, Tiago
Buckup, Marcus Motzkus; Univ. Heidelberg, Germany. Femtosecond
Degenerate Four‐Wave‐Mixing was employed to selectively prepare
vibrational coherence‐dynamics in electronic ground‐states of biophysically
active chromophores. The method can be used to determine
pure vibrational coherence evolution in the ground‐state.
WC1 • 10:45 a.m.
Frequency‐Domain Streak Camera for Ultrafast Imaging of Evolving
Luminal Velocity Objects, Zhengyan Li, Rafal Zgadzaj, Xiaoming Wang,
Stephen Reed, Yang Zhao, Michael C. Downer; Dept. of Physics, Univ. of
Texas at Austin, USA. We supplement Frequency‐Domain Holography
with a Frequency‐Domain Streak Camera to capture the time evolution
of luminal velocity refractive index structures in a single shot. A single
spectrometer acquires all data.
WB2 • 11:00 a.m.
Wave Packet Reconstruction on Unknown Potential Surfaces by Two‐
Colour Non‐Linear Wave Packet Interferometry, Heide N. Ibrahim1, Craig
Chapman2, Hiroyuki Katsuki1, Jeffrey A. Cina2, Kenji Ohmori1; 1Natl. Inst.s of
Natural Sciences, Japan, 2Dept. of Chemistry and Oregon Ctr. for Optics, Univ.
of Oregon, USA. The reconstruction of quantum mechanical states on
weakly characterized potential energy surfaces by two‐colour non‐linear
wave packet interferometry is presented and surveyed for the (wellknown)
model system Iodine in a jet.
WC2 • 11:00 a.m.
Compact and Low‐Cost Fs Diode‐Pumped Cr:Colquiriite Laser
Technology, James G. Fujimoto, Umit Demirbas, Duo Li, Andrew Benedick,
Gale S. Petrich, Jonathan R. Birge, Jing Wang, Sheila Nabanja, Leslie A.
Kolodziejski, Alphan Sennaroglu, Franz X. Kärtner; MIT, USA. Diodepumped
femtosecond Cr:Colquiriite lasers are a versatile, low‐cost
complementary technology to Ti:Sapphire. Modelocked tuning of >100‐
nm, GHz repetition‐rates and timing jitters of 156 attoseconds (10 kHz‐
10 MHz) are demonstrated from different Cr:Colquiriite laser
implementations.
WB3 • 11:15 a.m.
Visible Two‐Dimensional Spectroscopy with sub‐7 fs Pulses Uncovers
Ultrafast Electron‐Phonon Coupling Dynamics, Franz Milota1, Tomas
Mančal2, Vladimir Lukeš3, Alexandra Nemeth4, Jaroslaw Sperling4, Harald F.
Kauffmann4,5, Jürgen Hauer4; 1Lehrstuhl für BioMolekulare Optik, Ludwig‐
Maximilians‐Univ. München, Germany, 2Inst. of Physics, Faculty of
Mathematics and Physics, Charles Univ., Czech Republic, 3Dept. of Chemical
Physics, Slovak Technical Univ., Slovakia, 4Dept. of Physical Chemistry, Univ.
of Vienna, Austria, 5Ultrafast Dynamics Group, Faculty of Physics, Vienna
Univ. of Technology, Austria. Electronic two‐dimensional spectroscopy
with sub‐7 fs resolution with the aid of simulations and quantum
chemistry reveals the time scale and underlying dynamics of electronphonon
coupling, internal vibrational redistribution, and double
quantum resonances in solvated Zinc‐Phthalocyanine.
WC3 • 11:15 a.m.
Fast Fe‐Doped ZnO Scintillator for Accurate Synchronization of
Femtosecond Pulses from XFEL and Conventional Ultrafast Laser,
Toshihiko Shimizu1,2, Kohei Yamanoi1,2, Tomoharu Nakazato1,2, Kohei Sakai1,
Nobuhiko Sarukura1,2, Dirk Ehrentraut3, Tsuguo Fukuda3, Mitsuru
Nagasono2, Tadashi Togashi2, Shinichi Matsubara2,4, Kensuke Tono2, Atsushi
Higashiya2, Makina Yabashi2, Hiroaki Kimura2,4, Haruhiko Ohashi2,4, Tetsuya
Ishikawa2; 1Inst. of Laser Engineering, Osaka Univ., Japan, 2RIKEN, Japan,
3WPI Advanced Inst. for Materials Res., Tohoku Univ., Japan, 4Japan
Synchrotron Radiation Res. Inst., Japan. The luminescence rise time of a
Fe‐doped ZnO X‐ray scintillator was measured to be less than 4 ps. This
allows timing control between XFEL pulses and femtosecond lasers to
within a few picosecond accuracy.
WB4 • 11:30 a.m.
Measurement of Electron Correlation Using Two‐Dimensional
Electronic Double‐Quantum Coherence Spectroscopy, Vanessa M.
Huxter1,2, Jeongho Kim2,3, Gregory D. Scholes2; 1Univ. of California at Berkeley,
USA, 2Univ. of Toronto, Canada, 3KAIST, Republic of Korea. Twodimensional
electronic double‐quantum coherence spectroscopy (2‐DDQCS)
is a vibrationally sensitive, background‐free measure of the
electronic correlations between double and single excited states. 2‐DDQCS
measurements of organic dye molecules including wavelength
and solvent dependence are reported.
WC4 • 11:30 a.m.
Time‐Resolved Vibrational Circular Dichroism and Optical Rotation
with Utrashort Laser Pulses, Mathias Bonmarin, Jan Helbing; Univ.
Zürich, Switzerland. We present recent progress in enhancing chiral
vibrational signals using ellipsometric methods and broad band
detection for the improvement of our first transient vibrational circular
dichroism measurements.
WB5 • 11:45 a.m.
The Influence of Homoconjugation on Ultrafast Dynamics in
Cyclohexa‐1,4‐diene, Oliver Schalk, Andrey E. Boguslavskiy, Michael S.
Schuurman, Albert Stolow; Steacie Inst. of Molecular Sciences, Natl. Res.
Council Canada, Canada. The influence of homoconjugation on ultrafast
dynamics of cyclohexa‐1,4‐diene was investigated by time‐resolved
photoelectron spectroscopy in comparison with cyclohexene. While little
influence is seen on excited states, both molecules exhibit clearly
different ground state dynamics.
WC5 • 11:45 a.m.
Atmospheric Pressure Femtosecond Laser Imaging Mass
Spectrometry, Yves Coello, A. Daniel Jones, Tissa C. Gunaratne, Marcos
Dantus; Michigan State Univ., USA. We present a novel imaging mass
spectrometry technique using femtosecond laser pulses to ablate and
ionize the sample at ambient conditions with improved lateral
resolution (1μm), as demonstrated here with an image of vegetable
cells.
Anderson

Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
WB • Molecular Electron Correlation—Continued
WC • Novel Ultrafast Techniques—Continued
WB6 • 12:00 p.m.
Femtosecond Dynamics of Small Molecules Excited Studied with
Vacuum‐Ultraviolet Pulse Pairs, Thomas K. Allison1,2, Travis W. Wright3,
Adam M. Stooke1, Champak Khurmi2, Jeroen van Tilborg2, Yanwei Liu2, Roger
W. Falcone1,2, Ali Belkacem2; 1Univ. of California at Berkeley, USA, 2Lawrence
Berkeley Natl. Lab, USA, 3Univ. of California at Davis, USA. We use a split
mirror interferometer to combine two colors of a high order harmonic
source with variable delay. We report on the photodissociation dynamics
of O2 and C2H4 excited at 160 nm.
WC6 • 12:00 p.m.
Differential Multiphoton Microscopy, Jeffrey Squier, Jeff Field, Erich
Hoover, Eric Chandler, Michael Young, Dawn Vitek; Colorado School of
Mines, USA. High‐speed nonlinear imaging systems capable of
dynamically imaging differences in depth, excitation polarization,
excitation wavelength, beam shape, and pulse shape with single
element detection are presented for the first time.
WB7 • 12:15 p.m.
The Photoprotective Properties of Adenine: Time‐Resolved
Photoelectron Spectroscopy at Different Excitation Wavelengths,
Susanne Ullrich, N. L. Evans, Hui Yu, A. N. Brouillette; Univ. of Georgia,
USA. Competing deactivation pathways in Adenine are identified using
wavelength‐dependent time‐resolved photoelectron spectroscopy.
Excited state lifetimes associated with ππ*→nπ*→ground state
relaxation decrease with increasing excitation energies and an additional
pathway is accessible around 6eV.
WC7 • 12:15 p.m.
Label‐Free Live Brain Imaging with Ultrafast Nonlinear Microscopy,
Stefan Witte, Adrian Negrean, Johannes C. Lodder, Guilherme T. Silva,
Christiaan P. J. de Kock, Huibert D. Mansvelder, Marloes L. Groot; Vrije
Univ. Amsterdam, Netherlands. We demonstrate that third‐harmonic
generation microscopy using an ultrafast optical parametric oscillator is
a powerful technique for imaging live brain tissue with sub‐cellular
resolution, without the need for fluorescent dyes.
12:30 p.m.–2:00 p.m. Lunch Break (on your own)
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
WD • Photosynthesis
Wednesday, July 21
2:00 p.m.–3:45 p.m.
Ralph Jimenez; JILA, USA, Presider
WD1 • 2:00 p.m. Invited
Quantum‐Coherent Energy Transfer in Marine Algae at Ambient Temperature via Ultrafast Photon Echo Studies, Cathy Y. Wong, Hoda Hossein‐
Nejad, Carles Curutchet, Gregory D. Scholes; Univ. of Toronto, USA. Experiments using two‐dimensional photon echo spectroscopy reveal that electronic
excitations are coherently coupled in a family of light‐harvesting antenna proteins isolated from marine cryptophyte algae, thereby influencing
energy transfer.
WD2 • 2:30 p.m.
Towards Understanding the Role of Coherent Dynamics in Natural Light‐Harvesting, Jan Olšina, František Šanda, Tomáš Mančal; Faculty of
Mathematics and Physics, Charles Univ. in Prague, Czech Republic. Specially tailored projection operator is proposed to improve theoretical description
of a molecular system driven by fluctuating light. Coherent dynamics predicted by different theoretical methods are compared.
WD3 • 2:45 p.m.
Optimization of the Fast Charge Separation in Artificial Photosynthesis for Efficient Transport, Benjamin P. Fingerhut1, Wolfgang Zinth2, Regina de
Vivie‐Riedle1; 1Dept. Chemie und Biochemie, Ludwig‐Maximilians‐Univ. München, Germany, 2BioMolekulare Optik, Fakultät für Physik, Ludwig‐Maximilians‐
Univ. München and Ctr. for Integrated Protein Science München, Germany. The concepts of bacterial photosynthesis are extended to the design of
artificial photochemical devices. With multi‐objective genetic algorithms we reveal the energetic, morphologic and kinetic requirements of an
optimized charge‐separating unit coupled to diffusive transport.
WD4 • 3:00 p.m.
Signatures of Quantum Exciton Transport in Two‐Dimensional Coherent Optical Signals of Photosynthetic Complexes, Darius Abramavicius,
Shaul Mukamel; Univ. of California at Irvine, USA. We present simulations of two dimensional spectra in the photosynthetic reaction center of
photosystem II that clearly establish wavelike energy transport at room temperature. This transport mechanism survives decoherence due to the
fluctuating protein environment.
WD5 • 3:15 p.m.
Two‐Dimensional Electronic Spectroscopy of the Qy Band of Photosystem II Reaction Centers, Jeffrey A. Myers, Kristin L. M. Lewis, Franklin Fuller,
Patrick F. Tekavec, Jennifer P. Ogilvie; Univ. of Michigan, USA. We present two‐dimensional electronic spectroscopy studies on the dynamics of D1‐D2
cyt.b559 reaction center complexes from plant photosystem II at 77 K. Our two‐dimensional spectra are compared with models based on current
theory.
WD6 • 3:30 p.m.
Elucidation of Electronic Structure and Quantum Coherence in LHCII with Polarized 2‐D Spectroscopy, Gabriela S. Schlau‐Cohen1,2, Tessa R.
Calhoun1,2, Naomi S. Ginsberg1,2, Matteo Ballottari3, Roberto Bassi3, Graham R. Fleming1,2; 1Univ. of California at Berkeley, USA, 2Lawrence Berkeley Natl. Lab,
USA, 3Univ. of Verona, Italy. Polarized, broadband two‐dimensional electronic spectroscopy is performed on light harvesting complex II. The results
both reveal spectral features which can experimentally test site energies for the first time and also isolate quantum coherence signals.
3:45 p.m.–4:15 p.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
WE • Attosecond Spectroscopy I
Wednesday, July 21
4:15 p.m.–5:45 p.m.
Ursula Keller; ETH Zürich, Switzerland, Presider
WE1 • 4:15 p.m.
Attosecond Transient Absorption Spectroscopy for Real‐Time Observation of Valence Electron Motion, Adrian Wirth1, Eleftherios Goulielmakis1,
Zhi‐Heng Loh2,3, Robin Santra4,5, Nina Rohringer6, Vladislav S. Yakovlev7, Sergey Zherebtsov1, Thomas Pfeifer2,3, Abdallah M. Azzeer8, Matthias F. Kling1,
Stephen R. Leone2,3, Ferenc Krausz1,7; 1Max‐Planck‐Inst. für Quantenoptik, Germany, 2Univ. of California at Berkeley, USA, 3Chemical Sciences Div., Lawrence
Berkeley Natl. Lab, USA, 4Argonne Natl. Lab, USA, 5Dept. of Physics, Univ. of Chicago, USA, 6Lawrence Livermore Natl. Lab, USA, 7Dept. für Physik, Ludwig‐
Maximilians‐Univ., Germany, 8Physics and Astronomy Dept., King Saud Univ., Saudi Arabia. Combining attosecond technology and X‐ray absorption
spectroscopy further expands the horizon of attosecond science. In a proof‐of‐principle experiment we traced valence electron motion in real time
and completely reconstructed the strong‐field initiated spin‐orbit wavepacket coherence.
WE2 • 4:30 p.m.
Visualizing Electron Rearrangement in Space and Time during the Transition from a Molecule to Atoms, Wen Li1,2, Agnieszka A. Jaroń‐Becker1,
Craig W. Hogle1, Vandana Sharma1, Xi Bin Zhou1, Andreas Becker1, Henry C. Kapteyn1, Margaret M. Murnane1; 1JILA and Dept. of Physics, Univ. of Colorado,
USA, 2Dept. of Chemistry, Wayne State Univ., USA. Using strong field ionization and time‐resolved reaction microscope techniques, we visualize both
in space and time the dynamical evolution of the electrons as a molecular bond ruptures, and discover new aspects to the electronic dynamics.
WE3 • 4:45 p.m.
Pump‐Control Experiments to Enhance the Electron Localizability in Dissociating H2 with Phase‐Stable Laser Pulses, Bettina Fischer1, Manuel H.
Kremer1, Vandana Sharma1, Bernold Feuerstein1, Thomas Pfeifer1, Vitor L. B. de Jesus2, Christian Hofrichter1, Artem Rudenko3, Uwe Thumm4, Claus Dieter
Schröter1, Robert Moshammer1, Joachim Ullrich1; 1Max‐Planck‐Inst. für Kernphysik, Germany, 2Inst. Federal de Educação, Ciência e Tecnologia do Rio de Janeiro,
Brazil, 3Max‐Planck Advanced Study Group at CFEL, Germany, 4James R. Macdonald Lab, Kansas State Univ., USA. The first two‐pulse measurements with
carrier‐envelope‐phase (CEP) stabilized laser pulses on H2 were recorded with a reaction microscope. The role of a coherent wave packet in the
dissociating H2+ for the charge localization is investigated.
WE4 • 5:00 p.m.
High‐Order Harmonic Generation from Aligned Molecules with Intense Femtosecond 800‐ and 1300‐nm Pulses, Shinichirou Minemoto, Kosaku
Kato, Hirofumi Sakai; Univ. of Tokyo, Japan. Harmonic intensities from aligned CO2 molecules measured as a function of pump‐probe delay with 800‐
and 1300‐nm pulses modulate out of phase with ion yields at the same harmonic photon energies, supporting two‐center interference picture.
WE5 • 5:15 p.m.
Ultrafast Hydrogen Migration in Allene in Intense Laser Fields: Evidence in Three‐Body Coulomb Explosion, Huailiang Xu, Tomoya Okino, Kaoru
Yamanouchi; Univ. of Tokyo, Japan. Ultrafast hydrogen migration in allene (CH2=C=CH2) occurring within 20 fs in intense laser fields was investigated
by coincidence momentum imaging. The ultrafast spread of the distribution of a proton covering the entire molecule was visualized.
WE6 • 5:30 p.m.
Observation of Optical Bullets Formed in Laser‐Driven Plasma Bubble Accelerators, P. Dong1, S. A. Reed1, S. A. Yi1, S. Kalmykov1, G. Shvets1, N. H.
Matlis2, C. McGuffey3, S. S. Bulanov3, V. Chvykov3, G. Kalintchenko3, K. Krushelnick3, A. Maksimchuk3, T. Matsuoka3, A. G. R. Thomas3, V. Yanovsky3, M. C.
Downer1; 1Univ. of Texas at Austin, USA, 2Lawrence Berkeley Natl. Lab, USA, 3Ctr. for Ultrafast Optical Science, Univ. of Michigan, USA. Laser‐driven
plasma “bubble” accelerators, which produce mono‐energetic electron beams, are shown to reshape co‐propagating probe pulses into optical
“bullets” that visualize the bubble directly.
7:30 p.m.–9:30 p.m. Conference Dinner, Anderson/Hoaglund Rooms
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
Thursday, July 22, 8:00 a.m.–5:00 p.m. Registration Open, Lobby
ThA • Attosecond Spectroscopy II
Thursday, July 22
8:30 a.m.–10:15 a.m.
Kaoru Yamanouchi; Univ. of Tokyo, Japan, Presider
ThA1 • 8:30 a.m. Invited
High Harmonic Spectroscopy of Small Molecules: Waiting for HODO, Y. Mairesse1, J. Higuet1, N. Dudovich2, D. Shafir2, B. Fabre1, E. Mevel1, E.
Constant1, D. Villeneuve3, P. Corkum3, S. Patchkovskii3, M. Yu. Ivanov4, Z. Walters5, O. Smirnova5, Olga Smirnova5; 1Univ. Bordeaux 1, France, 2Weizmann Inst.
of Science, Israel, 3Natl. Res. Council Canada, Canada, 4Imperial College London, UK, 5Max‐Born‐Inst., Germany. We use high harmonic spectroscopy to
characterize the attosecond dynamics of multi‐electron re‐arrangement during strong‐field ionization of molecules. We reconstruct the relative phase
between different ionization continua to characterize the hole left upon ionization.
ThA2 • 9:00 a.m.
Driving Electronic Wavepackets by Attosecond Half‐Cycle Pulses, Xinhua Xie1, Stefan Roither1, Daniil Kartashov1, Li Zhang1, Emil Persson2, Stefanie
Gräfe2, Markus Schöffler3, Matthias Lezius4, Georg Reider1, Reinhard Dörner3, Joachim Burgdörfer2, Andrius Baltuška1, Markus Kitzler1; 1Photonics Inst., Vienna
Univ. of Technology, Austria, 2Inst. for Theoretical Physics, Vienna Univ. of Technology, Austria, 3Inst. für Kernphysik, J. W. Goethe Univ. Frankfurt, Germany,
4Max‐Planck Inst. for Quantum Optics, Germany. We study the feasibility of using attosecond half‐cycle pulses for quantum control of electron
wavepacket motion. Measured strong asymmetries in electron‐momentum‐spectra are explained by quantum simulations to result from excited state
dynamics and Coulomb effects.
ThA3 • 9:15 a.m.
Attosecond Transient Absorption around the Ionization Threshold of Helium, Florian Schapper1, Mirko Holler1, Paula Rivière2, Lukas Gallmann1, Ulf
Saalmann2, Jan‐Michael Rost2, Ursula Keller1; 1ETH Zürich, Switzerland, 2Max‐Planck‐Inst. for the Physics of Complex Systems, Germany. We observe
theoretically and experimentally the IR‐assisted absorption of an attosecond pulse train in a helium gas target. The transmitted photon yield is
modulated on an attosecond time‐scale, and a spectrally localized emission occurs.
ThA4 • 9:30 a.m.
Investigating Two‐Photon Double Ionization of D2 by XUV‐Pump / XUV‐Probe Experiments at Flash, Oliver Herrwerth1, Yuhai H. Jiang2, Artem
Rudenko3, Jhon F. Pérez‐Torres4, Lutz Foucar3, Moritz Kurka2, Kai U. Kühnel2, Michael Toppin2, Etienne Plésiat4, Fernando Morales4, Fernando Martín4, Till
Jahnke5, Reinhard Dörner5, Jose L. Sanz‐Vicario6, Jvan van Tilborg7, Ali Belkacem7, Michael Schulz8, Kiyoshi Ueda9, Theo J. M. Zouros10, Stefan Düsterer11, Roldf
Treusch11, Claus D. Schröter2, Matthias Lezius1, Matthias F. Kling1, Robert Moshammer2, Joachim Ullrich2; 1Max‐Planck‐Inst. für Quantenoptik, Germany, 2Max‐
Planck‐Inst. für Kernphysik, Germany, 3Max‐Plank Advanced Study Group at CFEL, Germany, 4Dept. de Química C‐9, Univ. Autónoma de Madrid, Spain, 5Inst.
für Kernphysik, Univ. Frankfurt, Germany, 6Inst. de Física, Univ. de Antioquia, Colombia, 7Lawrence Berkeley Natl. Lab, USA, 8Univ. of Missouri, USA, 9Inst. of
Multidisciplinary Res. for Advanced Materials, Tohoku Univ., Japan, 10Dept. of Physics, Univ. of Crete, Greece, 11DESY, Germany. Using a novel split‐mirror
set‐up attached to a Reaction Microscope at the Free electron LASer in Hamburg (FLASH) we demonstrate an XUV‐pump ‐ XUV‐probe experiment
by tracing the ultra‐fast nuclear wave‐packet motion in the D2+.
ThA5 • 9:45 a.m.
Ultrafast Control of Fragmentation Pathways of Soft X‐Ray Driven Dissociation of Triatomic N2O Molecules, Xibin Zhou, Predrag Ranitovic, Craig
Hogle, Margaret Murnane, Henry Kapteyn; JILA and Dept. of Physics, Univ. of Colorado, USA. Ultrashort X‐ray pulses initiate a coulomb explosion of N2O
through two distinct fragmentation pathways, corresponding to breaking an NN or NO bond. The branching ratio between these channels is
controlled using a 30fs infrared pulse.
ThA6 • 10:00 a.m.
Molecular Processes Controllable by Electron Dynamics, Philipp von den Hoff, Regina de Vivie‐Riedle; Dept. Chemie, Ludwig‐Maximilians‐Univ.,
Germany. Based on our calculations, we elucidate the role of light driven electron wavepacket motion for the control of molecular processes. We
highlight the system requirements defining the time window for electronic coherence and efficient control.
10:15 a.m.–10:45 a.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
10:15 a.m.–4:15 p.m. Exhibits Open, Erickson/Carroll/Sinclair Rooms
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThB • Light Driven Dynamics in Biomolecules
Thursday, July 22
10:45 a.m.–12:30 p.m.
Sandy Ruhman; Hebrew Univ. of Jerusalem, Israel, Presider
ThC • Quantum Coherence Correlations
Thursday, July 22
10:45 a.m.–12:30 p.m.
Alfred Leitenstorfer; Univ. Konstanz, Germany, Presider
ThB1 • 10:45 a.m.
Vibrationally‐Mediated Dynamics in β‐Carotene Probed with
Broadband 2‐D Electronic Spectroscopy, Tessa R. Calhoun1,2, Jeffrey A.
Davis3, Graham R. Fleming1,2; 1Univ. of California at Berkeley, USA, 2Lawrence
Berkeley Natl. Lab, USA, 3Swinburne Univ. of Technology, Australia.
Competing electronic pathways exhibiting energy dependence across a
single vibronic excitation are observed in β‐carotene for the first time
with broadband two‐dimensional electronic spectroscopy at 77K. The
origins and implications of these features are discussed.
ThC1 • 10:45 a.m. Invited
Coherent Measurements of High‐Order Electronic Correlations in
GaAs Quantum Wells, Daniel Turner, Keith A. Nelson; MIT, USA.
Multidimensional high‐order coherent spectroscopy reveals
correlations among more than two excitons. Features in the fifth‐order
and seventh‐order spectra allow us to measure the extent of exciton
correlations in a semiconductor nanostructure.
ThB2 • 11:00 a.m.
Coherent Multidimensional Spectroscopies Refine the Energy Level
Scheme of β‐Carotene, Niklas Christensson1, Franz Milota1, Alexandra
Nemeth1, Harald F. Kauffmann1,2, Jürgen Hauer1; 1Dept. of Physical Chemistry,
Univ. of Vienna, Austria, 2Ultrafast Dynamics Group, Faculty of Physics,
Vienna Univ. of Technology, Austria. Electronic single‐ and doublequantum
coherence spectroscopy (1Q‐ and 2Q‐2D) of β‐carotene reveals
the energetic position, transition strength and spectral properties of a
novel excited state above S2 with a transition in the visible spectral
region.
ThB3 • 11:15 a.m.
Coherent Effects in Carotenoids, Jeffrey A. Davis1, Evelyn Cannon1, Lap V.
Dao1, Peter Hannaford1, Keith A. Nugent2, Harry M. Quiney2; 1Swinburne
Univ. of Technology, Australia, 2Univ. of Melbourne, Australia. Long‐lived
vibrational coherences in carotenoids are enhanced when the carotenoid
is within the LH2 light‐harvesting complex. Electronic coherence of the
bright transition is also made observable in LH2, revealing new details of
excited state evolution.
ThC2 • 11:15 a.m.
Two‐Quantum Coherences in Optical Two‐Dimensional Fourier
Transform Spectroscopy, Steven Cundiff1, Denis Karaiskaj1, Xingcan Dai1,
Lijun Yang2, Alan D. Bristow1, Marten Richter2, Richard P. Mirin3, Shaul
Mukamel2; 1JILA, NIST, Univ. of Colorado, USA, 2Univ. of California at
Irvine, USA, 3NIST, USA. We present optical two‐dimensional Fourier
transform spectra for the pulse sequence sensitive to two‐quantum
coherences. In semiconductors, two‐quantum coherences occur due to
biexcitons and many‐body effects, in a potassium vapor, they arise
from atomic interactions.
ThB4 • 11:30 a.m.
Direct Observation of the Conical Intersection in cis‐trans
Photoisomerization of Rhodopsin, Dario Polli1, Piero Altoè2, Oliver
Weingart3, Philipp Kukura4, Katelyn Spillane5, Cristian Manzoni1, Daniele
Brida1, Gaia Tomasello2, Giorgio Orlandi2, Richard A. Mathies5, Marco
Garavelli2, Giulio Cerullo1; 1Politecnico di Milano, Italy, 2Univ. di Bologna,
Italy, 3Univ. Duisburg‐Essen, Germany, 4ETH Zürich, Switzerland, 5Univ. of
California at Berkeley, USA. High‐time‐resolution broadband pump‐probe
spectroscopy of rhodopsin reveals loss of reactant and appearance of
photoproduct features within ≈100fs, which are signatures of a
wavepacket moving through a conical intersection. Experiments are
supported by molecular dynamics simulations.
ThC3 • 11:30 a.m.
Coherent Energy Transport between Coupled Quantum Wells
Studied by Two‐Dimensional Terahertz Spectroscopy, Wilhelm
Kuehn1, Klaus Reimann1, Michael Woerner1, Thomas Elsaesser1, Rudolf Hey2;
1Max‐Born‐Inst. für Nichtlineare Optik und Kurzzeitspektroskopie, Germany,
2Paul‐Drude‐Inst. für Festkörper Elektronik, Germany. A coupled quantum
well system is extensively studied by fully phase‐resolved 2‐D
intersubband spectroscopy. We observe prominent oscillatory features,
caused by a coherent LO‐phonon mediated charge transport between
both wells within 120fs.
ThB5 • 11:45 a.m.
Coherent Torsional Motion and Isomerization Dynamics across a
Conical Intersection, Julien Briand1, Jérémie Léonard1, Vinizio Zanirato2,
Massimo Olivucci3, Stefan Haacke1; 1Univ. Strasburg ‐ IPCMS, France, 2Univ.
di Ferrara, Italy, 3Bowling Green State Univ., USA. The ultrafast
isomerisation dynamics of indanylidene‐pyrroline photo‐switches show
evidence for vibrational coherences along the reaction coordinate. We
observe, to our knowledge for the first time, a dependence of wavepacket
decoherence on the isomerization direction.
ThC4 • 11:45 a.m.
Ultrafast THz Response of Few‐Layer Epitaxial Graphene, Hyunyong
Choi1, Ferenc Borondics1, David A. Siegel1,2, Shuyun Zhou1,2, Michael C.
Martin1, Alessandra Lanzara1,2, Robert A. Kaindl1; 1Lawrence Berkeley Natl.
Lab, USA, 2Univ. of California at Berkeley, USA. Ultrafast measurements
of few‐layer epitaxial graphene are reported along with its equilibrium
optical conductivity. We observe transient THz electrodynamics
consistent with photoexcited holes in a dense Dirac electron plasma,
which recombine on a picosecond timescale.
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThB • Light Driven Dynamics in Biomolecules—Continued
ThC • Quantum Coherence Correlations—Continued
ThB6 • 12:00 p.m.
Time‐Energy Map of Photoelectron Angular Anisotropy for
Investigation of Ultrafast Internal Conversion, Takao Fuji1,2, Yoshi‐Ichi
Suzuki1,2,3, Takuya Horio1,2,3, Toshinori Suzuki1,2,3; 1CREST, JST, Japan,
2RIKEN, Japan, 3Kyoto Univ., Japan. Ultrafast internal conversion of
pyrazine through a conical intersection was observed by photoelectron
imaging with 22 fs time‐resolution. The 2‐D time‐energy map of the
photoelectron angular anisotropy revealed a clear signature of the
internal conversion.
ThC5 • 12:00 p.m.
Controlling “Mottness” in a Correlated Electron System via Coherent
Vibrational Excitation, Stefan Kaiser1, Raʹanan I. Tobey2, Nicky Dean2,
Cristian Manzoni1, Hiroshi Okamoto3, Junʹya Tsutsumi3, Tatsuo Hasegawa3,
Andrea Cavalleri1,2; 1Univ. of Hamburg, Germany, 2Dept. of Physics, Univ. of
Oxford, Clarendon Lab, UK, 3AIST, Japan. Control of onsite electronic
wavefunctions is achieved in the organic conductor (BEDT‐TTF)‐
F2TCNQ by resonant excitation of localized molecular vibrational
modes of the BEDT molecule. In this way, the onsite two‐particle
Coulomb repulsion can be modulated.
ThB7 • 12:15 p.m.
Dynamic Vibrational Stark Spectroscopy: Measuring the Solvent
Response in Ultrafast Charge‐Transfer Reactions, Carlos R. Baiz, Kevin J.
Kubarych; Univ. of Michigan, USA. We present the first implementation of
dynamic vibrational Stark‐effect spectroscopy and demonstrate its use as
a probe of non‐equilibrium dynamics in phototriggered charge‐transfer
reactions.
ThC6 • 12:15 p.m.
All‐Optical Coherent Control of Electrical Currents in Single GaAs
Nanowires, Claudia Ruppert1, Sebastian Thunich1, Gerhard Abstreiter2,
Anna Fontcuberta i Morral2,3, Alexander W. Holleitner2, Markus Betz1,4;
1Technische Univ. München, Germany, 2Walter‐Schottky‐Inst., Technische
Univ. München, Germany, 3Lab des Matériaux Semiconducteurs. Inst. des
Matériaux, École Polytechnique Fédérale de Lausanne, Switzerland,
4Technische Univ. Dortmund, Germany. A phase‐stable superposition of
femtosecond pulses and their second harmonic induces ultrashort
microampere current bursts in single unbiased GaAs nanowires.
Current injection relies on quantum interference of one‐ and twophoton
absorption pathways.
12:30 p.m.–2:00 p.m. Lunch Break (on your own)
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThD • Vibrational Coherence and Energy Transport
Thursday, July 22
2:00 p.m.–3:45 p.m.
Gregory Scholes; Univ. of Toronto, Canada, Presider
ThD1 • 2:00 p.m.
Ultrafast Coupled Electronic and Lattice Dynamics in Exciton Self‐Trapping: Correlation of the Localization Length and Acoustic Phonon
Dynamics, J. G. Mance, F. X. Morrissey, A. D. Van Pelt, S. L. Dexheimer; Washington State Univ., USA. We probe the dynamics of exciton self‐trapping
using femtosecond impulsive excitation techniques. We find a low frequency oscillatory response consistent with coherent acoustic phonon
generation, with an acoustic wavelength that scales with exciton localization length.
ThD2 • 2:15 p.m. Invited
Vibrational Energy Transport in Peptides and Proteins, Peter Hamm1, Marco Schade1, Ellen H. G. Backus1, Alessandro Moretto2, Claudio Toniolo2; 1Inst. of
Physical Chemistry, Univ. of Zürich, Switzerland, 2Inst. of Biomolecular Chemistry, Padova Unit, CNR, Dept. of Chemistry, Univ. of Padova, Italy. We
investigate the vibrational energy flow in 310‐helical peptide structures. Several local heaters reveal very similar results, indicating that energy
randomizes very quickly. Nevertheless, intra‐site IVR slows down vibrational energy transport on the picosecond timescale.
ThD3 • 2:45 p.m.
Multiply Excited Vibrational States of Docking‐Site CO Simultaneously Observed with Ground‐State Bleach after Photolysis from Heme
Proteins, Patrick Nuernberger, Kevin F. Lee, Adeline Bonvalet, Jean‐Louis Martin, Marten H. Vos, Manuel Joffre; Lab d’Optique et Biosciences, École
Polytechnique, France. We simultaneously observe ultrafast ligand dissociation and docking‐site absorption in carboxy‐heme proteins. Highly
sensitive visible pump/infrared probe spectroscopy reveals multiply excited vibrational states exhibiting distinct differences for hemoglobin and
FixL.
ThD4 • 3:00 p.m.
Ultrafast Dynamics of the BLUF Mutant dAppA Q63E Revealed by TRIR and Fluorescent Upconversion, Andras Lukacs1, Allison Haigney2, Minako
Kondo1, Richard Brust2, Greg Greetham3, Mike Towrie3, Peter J. Tonge2, Stephen R. Meech1; 1School of Chemistry, Univ. of East Anglia, UK, 2Dept. of Chemistry,
Stony Brook Univ., USA, 3Central Laser Facilty, Rutherford Appleton Lab, UK. Primary processes in blue light sensing proteins are investigated by
ultrafast vibrational and fluorescence spectroscopy. A major role for modulation of H‐bonded interaction between flavins and a critical Q63 residue
are revealed through mutagenesis.
ThD5 • 3:15 p.m.
Initial Relaxation Dynamics of Retinal Protonated Schiff‐Bases Determined by Pump Degenerate Four Wave Mixing, Tiago Buckup, Jan P. Kraack,
Marcus Motzkus; Univ. Heidelberg, Germany. Initial relaxation‐dynamics of photo‐excited all‐trans retinal protonated Schiff‐bases were investigated
with Pump‐Degenerate Four Wave Mixing. It is presented that low‐frequency modes are excitable only within a short time of relaxation from the
Franck‐Condon point.
ThD6 • 3:30 p.m.
Deciphering Excited State Evolution in Halorhodopsin with Stimulated Emission Pumping, Oshrat Bismuth1, Pavel Komm1, Noga Friedman2, Tamar
Eliash2, Mordechai Sheves2, Sanford Ruhman1; 1Hebrew Univ., Israel, 2Weizmann Inst. of Science, Israel. Femtosecond pump, NIR dump experiments
demonstrate that contrary to previous reports, nonexponential internal conversion in Natronomonas pharaonis Halorhodopsin doesn’t reflect
bifurcation in the fluorescent state to short lived reactive, and slowly decaying non reactive populations.
3:45 p.m.–4:15 p.m. Coffee Break/Exhibits, Erickson/Carroll/Sinclair Rooms
ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThE1
Pulse Shaper Based Strategies for Selective
Single‐Beam CARS Spectroscopy, Paul
Wrzesinski, Dmitry Pestov, Vadim Lozovoy,
Marcos Dantus; Michigan State Univ., USA. The
use of chirp, sinusoidal and binary phase
shaping for mode‐specific excitation in singlebeam
CARS is experimentally evaluated in
terms of signal‐to‐background and selectivity.
The advantages and disadvantages of each
pulse shaping scheme are discussed.
ThE2
Ultrafast Optical Response of Lead
Lanthanum Zirconium Titanate Ceramics,
Atsushi Sugita, Masashi Morimoto, Yoshimasa
Kawata, Naoki Wakiya, Hisao Suzuki; Shizuoka
Univ., Japan. We will report ultrafast optical
response of lead lanthanum zirconium titanate
ceramics. The photo‐induced birefringence
was by approximately 20 times larger than
that of SiO2, while its optical response was
shorter than 70 fs.
ThE3
Optical Magnetic Field Detection: Intracavity
Phase Interferometry, Andreas Schmitt‐Sody,
Koji Masuda, Andreas Velten, Jean‐Claude Diels;
Dept. of Physics and Astronomy, Univ. of New
Mexico, USA. A new approach to
magnetometry is demonstrated. Using
intracavity phase to frequency conversion a
sensitivity of 10nT corresponding to a
polarization rotation of 2x10‐9rad can be
achieved, using a short TGG crystal as sensing
element.
ThE4
Coherent Nuclear Motion of Blue Copper
Protein; Plastocyanin: Comparing LMCT and
d‐d Excitation, Yutaka Nagasawa1, Kenji Fujita1,
Tetsuro Katayama1, Yukihide Ishibashi1, Hiroshi
Miyasaka1, Teruhiro Takabe2, Satoshi Nagao3,
Shun Hirota3; 1Osaka Univ., Japan, 2Meijo Univ.,
Japan, 3Nara Inst. of Science and Technology,
Japan. Ultrafast transient absorption
measurement was carried out for a blue
copper protein, plastocyanin, with excitation
at LMCT (597 nm) and d‐d band (895 nm).
Franck‐Condon and Herzberg‐Teller type
coherent nuclear oscillations were observed.
ThE5
Determining Chlorophyll Orientation in the
CP29 Light Harvesting Complex with
Arithmetic Polarized 2‐D Electronic
Spectroscopy, Naomi S. Ginsberg1,2, Jeffrey A.
Davis3, Matteo Ballottari4, Yuan‐Chung Cheng5,
Roberto Bassi4, Graham R. Fleming1,2; 1Lawrence
Berkeley Natl. Lab, USA, 2Univ. of California at
Berkeley, USA, 3Swinburne Univ. of Technology,
Australia, 4Univ. of Verona, Italy, 5Natl. Taiwan
Univ., Taiwan. The relative orientation of
chlorophyll transition dipole moments in the
light harvesting complex CP29 is determined
directly from experimental measurements of a
set of polarized two‐dimensional electronic
spectra in combination with polarization
tensor relations.
ThE6
Ultrafast Excited State Dynamics in Genomic
DNA, Kimberly de La Harpe1, Bern Kohler2; 1Ohio
State Univ., USA, 2Montana State Univ., USA.
Excited electronic states in a genomic DNA
sequence containing all four DNA bases were
studied using femtosecond transient
absorption spectroscopy. Long‐lived excited
states observed in each single strand
separately are conserved in the duplex DNA.
ThE7
Induced Fit and Ultrafast Vibrational
Dynamics in Host‐Guest‐Chemistry
Explored by 2DIR‐Spectroscopy, Britta
Valentin, Stephan Knop, Martin Olschewski, Jörg
Lindner, Peter Vöhringer; Rheinische Friedrich‐
Wilhelms‐Univ. Bonn, Germany. Femtosecond
two‐dimensional infrared spectroscopy in the
NH‐ and CH‐stretching spectral region was
used to unravel structural details and the
vibrational energy flow in the supramolecular
host‐guest complex of an ammonium cation
and a cryptand.
ThE8
fs‐Fluorescence Measurements of the
Adenine Dinucleotide: Direct Observation of
the Excimer State, Mayra C. Stuhldreier,
Carmen Schüler, Joscha Kleber, Friedrich Temps;
Inst. für Physikalische Chemie, Christian‐
Albrechts‐Univ. zu Kiel, Germany. Femtosecond
time‐resolved fluorescence measurements on
the adenine dinucleotide d(pApA) revealed
wavelength‐dependent, complex excited‐state
relaxation dynamics via monomer‐like and via
excimer states, depending on the degree of
base stacking.
ThE9
Ultrafast Photochemistry of Mercury
Dithizonates, Heinrich Schwoerer1, Karel von
Eschwege2, Gurthwin Bosman1, Patrizia Krok1,
Jeanet Conradie2; 1Laser Res. Inst., Stellenbosch
Univ., South Africa, 2Dept. of Chemistry, Univ. of
the Free State, South Africa. We investigate the
photoreaction of mercury dithizonate, and
find an ultrafast radiationless reaction into the
syn and anti configuration with almost equal
probability, which is interpreted by a conical
intersection between excited and ground state.
ThE10
Dynamic Solvent Effects on Equilibrium
Isomerization: Kramers Theory Revisited
with 2DIR Chemical Exchange, Jessica M.
Anna, Kevin J. Kubarych; Univ. of Michigan,
USA. Using ultrafast two dimensional infrared
chemical exchange spectroscopy we
monitored the equilibrium exchange between
two dicobalt octacarbonyl isomers in linear
alkane solvents. Results were inconsistent
with a Markovian hydrodynamic viscosity
implicating Kramers‐Hubbard and/or
frequency‐dependent friction.
ThE11
The Influence of Solvent and Chirp on the
Excited State Dynamics of 7‐
Dehydrocholesterol in Solution, Kuo‐Chun
Tang, Kenneth G. Spears, Roseanne J. Sension;
Univ. of Michigan, USA. UV‐visible
femtosecond transient absorption
spectroscopy and UV pulse shaping were
used to probe the excited state dynamics of 7‐
dehydrocholesterol (provitamin D3) in
solution.
ThE12
Separating Sub‐Ensembles on Ultrafast
Timescales: Multiple‐Population Period
Transient Spectroscopy (MUPPETS),
Champak Khurmi, Mark A. Berg; Univ. of South
Carolina, USA. Multidimensional incoherent
spectroscopy has analogs of echoes,
stimulated echoes, hole‐burning and
correlation spectroscopy. These MUPPETS
methods disentangle complex, nonexponential
kinetics. A pathway formulation extends
MUPPETS to many processes and
systematically treats high‐order transient
gratings.
ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThE13
Ultrafast Intramolecular Charge Transfer
(ICT) Dynamics of 4‐(Dimethylamino)
Benzonitrile (DMABN) , Myeongkee Park,
Chulhoon Kim, Taiha Joo; Dept. of Chemistry,
Pohang Univ. of Science and Technology, Republic
of Korea. Formation times of intramolecular
charge‐transfer (ICT) state of 4‐
(dimethylamnio)benzonitrile (DMABN) in
acetonitrile are resolved by time constants of
30 fs, 180 fs, and 2.7 ps, denoting the ICT state
can be created through multi ways.
ThE14
The First Picoseconds in the Life of
Benzhydryl Cations: Ultrafast Generation
and Chemical Reactions, Christian F. Sailer1,
Benjamin P. Fingerhut2, Johannes Ammer2,
Christoph Nolte2, Igor Pugliesi1, Herbert Mayr2,
Regina de Vivie‐Riedle2, Eberhard Riedle1; 1LS für
BioMolekulare Optik, Ludwig‐Maximilians‐Univ.
München, Germany, 2Dept. Chemie, Ludwig‐
Maximilians‐Univ. München, Germany. For
benzhydryl chloride compounds we observe
that photodissociation only leads to radical
pairs. The typically observed cations are
formed by subsequent electron transfer.
Reactions of cations in neat alcohols can then
occur within 2.6 ps.
ThE15
Ultrafast Molecular Planarization through a
Conical Intersection, Jenny Clark1, Giovanni
Cirmi2, Guglielmo Lanzani2; 1Cavendish Labs,
Univ. of Cambridge, UK, 2Politecnico di Milano,
Italy. Pump‐push‐probe experiments on
fluorene‐heptamer in solution reveal ultrafast
planarization of the molecular backbone,
within 200 fs, at variance with typical time
scale of 40 ps. This suggests relaxation
through a conical intersection.
ThE16
New Insights into the Excited State
Relaxation Network of Carotenoids, Tiago
Buckup, Marie S. Marek, Marcus Motzkus;
Ruprecht‐Karls‐Univ. Heidelberg, Germany. By
applying DFWM and pump‐DFWM to
lycopene and β‐carotene detailed knowledge
about the internal conversion between the S2
and S1 state is gained. An additional very fast
dynamics directly after excitation of S2 is
discussed.
ThE17
Solvent Dependent Spectral Diffusion in
Hydrogen Bonding Environments, John T.
King, Kevin Kubarych; Univ. of Michigan, USA.
The spectral diffusion of Mn2(CO)10 in
hydrogen bonding solvents was studied using
ultrafast two‐dimensional infrared
spectroscopy. In a series of alcohols with
increasing chain length, the dynamics of
hydrogen bonding environments can be
selectively studied.
ThE18
Ultrafast, Protein‐Based All‐Optical
Switching, Zsuzsanna Heiner1, László Fábián1,
Mark Mero2, Miklós Kiss3, Károly Osvay3, András
Dér1; 1Inst. of Biophysics, Hungarian Acad. of
Sciences, Hungary, 2HAS Res. Group of Laser
Physics, Hungarian Acad. of Sciences, Hungary,
3Dept. of Optics and Quantum Electronics, Univ.
of Szeged, Hungary. A picosecond all‐optical
switch based on the bR‐K transition of the
photocycle of the chromoprotein
bacteriorhodopsin is demonstrated by an
integrated optical waveguide structure. The
results are expected to have implications for
fast telecommunication.
ThE19
Generation of Stable and Clean 8‐fs Pulses at
400nm in a Hollow Fiber for UV Pump‐Probe
Experiment, Jun Liu1,2, Kotaro Okamura1,2,
Yuichiro Kida1,2, Takahiro Teramoto1,2, Takayoshi
Kobayashi1,2,3,4; 1Univ. of Electro‐Communications,
Japan, 2JST, Japan, 3Natl. Chiao Tung Univ.,
Taiwan, 4Osaka Univ., Japan. Stable and clean 8‐
fs pulses at 400 nm were obtained using a
beam pointing stabilizer before a hollow‐fiber
compressor and a prism pair together with a
deformable mirror system for dispersive
compensation.
ThE20
Measuring the Spatiotemporal Field of
Diffracting and Non‐Diffracting Ultrashort
Pulses, Pamela Bowlan1, Madis Lõhmus2, Peeter
Piksarv2, Heli Valtna‐Lukner2, Peeter Saari2, Rick
Trebino1; 1Georgia Tech, USA, 2Univ. of Tartu,
Estonia. Using SEA TADPOLE, we directly
measure the spatiotemporal field of pulses
after diffracting off of simple apertures
observing the “boundary wave pulses”. We
also measure the spatiotemporal field of nondiffracting,
superluminal Bessel‐X pulses.
ThE21
Characterization of High‐Frequency,
Quantum‐Limited Timing Jitter in Stretched‐
Pulse and Soliton, Passively‐Modelocked
Fiber Lasers, Jonathan A. Cox, Amir H.
Nejadmalayeri, Franz X. Kärtner; MIT, USA. We
measured the timing jitter, with
unprecedented sensitivity and bandwidth,
between pairs of similar 80MHz stretchedpulse
and 200MHz soliton, passively modelocked
lasers with 400pJ pulse energy, to be
7.3fs and 4.6fs [10kHz, 10MHz], respectively.
ThE22
Single‐Dispersive‐Element Pulse
Compressor, Vikrant K. Chauhan, Pamela
Bowlan, Jacob Cohen, Rick Trebino; Georgia Tech,
USA. We introduce an ultrashort‐laser‐pulse
compressor that is compact and automatically
aligned for distortion‐free output. It uses a
single prism and a single grating, and it
compensates for significant material
dispersion up to third order.
ThE23
Simply Measuring Many‐Picosecond
Ultrashort Pulses with High Spectral
Resolution, Jacob Cohen, Pamela Bowlan,
Vikrant Chauhan, Rick Trebino; Georgia Tech,
USA. We introduce three new techniques for
measuring relatively long and very complex
ultrashort pulses, allowing the measurement
of pulses as long as 120ps with 39fs resolution.
ThE24
Few‐Cycle OPCPA System with More than
1μJ at 143kHz, Marcel Schultze1, Thomas
Binhammer2, Andy Steinmann1, Guido Palmer1,
Moritz Emons1, Uwe Morgner1,3; 1Leibniz Univ.
Hannover, Germany, 2Venteon Laser Technologies
GmbH, Germany, 3Laser Zentrum Hannover
(LZH), Germany. An OPCPA system delivering
8.8 fs pulses with 1.3 μJ of energy at 143 kHz
repetition rate is presented. Pump and seed
for the parametric amplification are
simultaneously generated by a broadband
Ti:sapphire oscillator.
ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThE25
Completely Characterizing Single
Attosecond Pulses by the Modified Spectral
Phase Interferometry, Jiangfeng Zhu1,2, Shaobo
Fang1,2, Keisaku Yamane1,2, Tao Chen1,2, Mikio
Yamashita1,2; 1Dept. of Applied Physics, Hokkaido
Univ., Japan, 2Core Res. for Evolutional Science
and Technology, JST, Japan. Complete
characterization of single attosecond pulses by
the modified spectral phase interferometry is
presented considering the frequencydependent
spectral shear. The results show no
principle limitation of characterizing arbitrary
short single attosecond pulses.
ThE26
High‐Order Harmonic Generation by Few‐
Cycle Pulses from Filamentation, Daniel S.
Steingrube1,2, Emilia Schulz1,2, Thomas
Binhammer3, Tobias Vockerodt1,2, Uwe Morgner1,2,
Milutin Kovacev1,2; 1Inst. für Quantenoptik,
Leibniz Univ. Hannover, Germany, 2QUEST, Ctr.
for Quantum Engineering and Space‐Time Res.,
Germany, 3VENTEON Laser Technologies GmbH,
Germany. High‐order harmonics are generated
in a semi‐infinite gas cell by ultra‐short pulses
from a filament compressed to pulse duration
of 7 fs. Harmonic spectra in different noble
gases are obtained yielding a continuous
structure.
ThE27
Bandwidth‐Enhanced Noncollinear Optical
Parametric Amplification via Anamorphic
Pumping, Philip J. M. Johnson, Valentyn I.
Prokhorenko, R. J. Dwayne Miller; Univ. of
Toronto, Canada. We present a scheme for
anamorphic pumping to enhance the
amplified bandwidth in a single‐pass bluegreen
NOPA, resulting in up to 100THz
output. This represents a significant gain in
amplified bandwidth over conventional
focusing.
ThE28
Self‐Trapping of Supercontinuum Generated
by Femtosecond Pulses in a Noble Gas,
Trenton R. Ensley, Dmitry A. Fishman, Lazaro A.
Padilha, Scott Webster, David J. Hagan, Eric W.
Van Stryland; CREOL, College of Optics and
Photonics, Univ. of Central Florida, USA. We
present an experimental and theoretical study
of self‐trapping that includes self‐focusing and
the production of plasma for supercontinuum
generated in noble gases using ultra‐short
laser pulses.
ThE29
Advanced Compton Scattering Light Source
R&D at LLNL, Felicie Albert, Scott G. Anderson,
Gerry G. Anderson, Andy J. Bayramian, Shawn
M. Betts, Tak S. Chu, David J. Gibson, Roark A.
Marsh, Michael J. Messerly, Miroslav Y. Shverdin,
Sheldon S. Wu, Fred V. Hartemann, Craig W.
Siders, Christopher P. J. Barty; Lawrence
Livermore Natl. Lab, USA. We report the design
and current status of a monoenergetic laserbased
Compton scattering 0.5‐2.5 MeV γ‐ray
source. Previous nuclear resonance
fluorescence results and future linac and laser
developments for the source are presented.
ThE30
Photoemission‐Coherent Auger Decay, Aart
J. Verhoef1, Alexander Mitrofanov1, Xuan Trung
Nguyen1, Maria Krikunova2, Markus Drescher2,
Armin Scrinzi1,3, Andrius Baltuška1; 1Vienna
Univ. of Technology, Austria, 2Univ. Hamburg,
Germany, 3Ludwig‐Maximilians‐Univ. München,
Germany. In the presence of an IR‐field, highenergy
Auger‐electrons are emitted with the
same kinetic energy as IR‐streaked electrons
directly XUV‐ionized from the 4s‐subshell in
Krypton. Interference of the two electronic
wave‐packets is experimentally observed.
ThE31
High Harmonic Generation for Study of
Rotational Raman Coherence, Lap Van Dao,
Khuong Ba Dinh, Peter Hannaford; Swinburne
Univ. of Technology, Australia. The modulation
of the intensity of phase‐matched highharmonic
radiation from field‐free aligned
diatomic molecules due to changes of the
nonlinear refractive index is used to determine
rotational coherence in the ground state of
molecules.
ThE32
Isolating Spectral Contributions from Local
Field Effects in an Atomic Vapor Using Two‐
Quantum 2‐D FT Optical Spectroscopy,
Katherine W. Stone, Keith A. Nelson; MIT, USA.
Two‐quantum 2‐D Fourier transform optical
spectroscopy is used to separate the
contributions of dipole‐dipole interactions to
the overall nonlinear optical response which
isolates them from the atomic resonances in
rubidium vapor that generated them.
ThE33
Coherent Control of Population Transfer in
an Open Quantum System in the One‐
Photon Limit, Valentin I. Prokhorenko, Philip J.
M. Johnson, R. J. Dwayne Miller; Univ. of
Toronto, Canada. Using chirped excitation
pulses on the level of ≤ 1 photon per field
mode we are able to manipulate the excited
state population of a dye molecule in a solvent
by ~4%.
ThE34
Space‐Time Coupling in Femtosecond Scalar
and Vector Pulse Shaping, Franziska Frei, Reto
Bloch, Thomas Feurer; Inst. of Applied Physics,
Univ. of Bern, Switzerland. We present
analytical as well as experimental results of
space‐time coupling in femtosecond scalar and
vector pulse shaping. In focusing geometry,
the influence of space‐time coupling on
nonlinear light matter interaction is discussed.
ThE35
Non‐Born‐Oppenheimer Wavepacket
Revivals in a Polyatomic Molecule, Andrey E.
Boguslavskiy, Dave Townsend, Michael S.
Schuurman, Albert Stolow; Steacie Inst. for
Molecular Sciences, Natl. Res. Council Canada,
Canada. Non‐Born‐Oppenheimer wavepacket
revivals have been observed in 1,4‐
diazabicyclo[2.2.2]octane using time‐resolved
photoelectron spectroscopy. Upon
photoexcitation, he wavepacket oscillates
between the first two excited states for over 14
ps ‐ a behavior only seen in diatomics before.
ThE36
Terahertz Generation via Two Color
Photoionization in Pre‐Formed Plasma, Yong‐
Sing You, Ki‐Yong Kim; Univ. of Maryland, USA.
The generation of terahertz radiation is
examined when two‐color laser fields are
mixed in pre‐formed plasma created by
another laser pulse. The result confirms the
key role of tunneling ionization in the
terahertz generation mechanism.
ThE37
Photoconductivity in TiO2 Nanotubes
Measured by Time Resolved Terahertz
Spectroscopy, Christiaan Richter, Charles
Schmuttenmaer; Yale Univ., USA. Picosecond
time resolved photoconductivity of TiO2
single crystals, nanoparticles, and nanotubes is
reported. Long range photoconductivity of
both nanomaterials is impaired. The THz data
reveal a very different microscopic mechanism
reducing conductivity nanotubes vs.
nanoparticles.
ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThE38
Non‐Degenerate Pump‐Probe Spectroscopy
of Single GaN Nanowires, Prashanth C.
Upadhya1, Julio A. Martinez2, Qiming Li2, George
T. Wang2, Brian S. Swartzentruber2, Antoinette J.
Taylor1, Rohit P. Prasankumar1; 1Ctr. for
Integrated Nanotechnologies, Los Alamos Natl.
Lab, USA, 2Sandia Natl. Labs, USA. Spatiallyresolved
ultrafast transient absorption
measurements on a single GaN nanowire give
insight into carrier relaxation dynamics as a
function of the probe polarization and
position on the nanowire on a femtosecond
timescale.
ThE39
Measurement of Effective Refractive Index
Ellipse of LiNbO3 Subwavelength Slab
Waveguide for Thz Phonon Polariton Wave,
Chengliang Yang1, Qiang Wu1, Christopher A.
Werley2, Jingjun Xu1, Keith A. Nelson2; 1Nankai
Univ., China, 2MIT, USA. The propagation
process of THz phonon polariton wave in 50
micrometer LiNbO3 slab waveguide is
recorded using polarization gating imaging
system. The effective refractive indexes of
different models are calculated from the
dispersion curves.
ThE40
Ultrafast Photoinduced Phase Conversion to
a Metallic State in Quasi‐One‐Dimensional
Platinum Complexes under Extremely High‐
Density Excitation, Taro Kawano1, Ikufumi
Katayama2, Taeho Shin3, Johanna Wolfson3, Keith
A. Nelson3, Jun Takeda1; 1Graduate School of
Engineering, Yokohama Natl. Univ., Japan,
2Interdisciplinary Res. Ctr., Yokohama Natl.
Univ., Japan, 3MIT, USA. Ultrafast
photoinduced phase conversion from a
charge‐density wave state to a metallic state in
quasi‐one‐dimensional platinum complexes is
successfully demonstrated by single‐shot
pump‐probe spectroscopy with dual echelons
under extremely high‐density excitation above
1 photon/platinum site.
ThE41
THz Kerr Effect in Relaxor Ferroelectrics,
Harold Y. Hwang1, Matthias C. Hoffmann2,
Nathaniel C. Brandt1, Keith A. Nelson1; 1MIT,
USA, 2Univ. of Hamburg, Germany. THzinduced
optical birefringence was observed in
the relaxor ferroelectrics KTN and KLTN. The
dynamics observed may arise from the onset
of ferroelectric nanodomains.
ThE42
Observation of THz Nonlinearity in CVDGrown
Graphene, Harold Y. Hwang, Nathaniel
C. Brandt, Hootan Farhat, Allen L. Hsu, Jing
Kong, Keith A. Nelson; MIT, USA. Nonlinear
transmission experiments were performed on
CVD‐grown graphene. THz‐induced
transparency and nonlinear THz generation
were observed at high THz field strengths.
ThE43
Coherent Nonlinear Response Surviving at
Room Temperature Caused by Ultrafast
Radiative Decay of Confined Excitons,
Masaaki Ashida1, Masayoshi Ichimiya1,2, Keita
Mochizuki1, Hideki Yasuda3, Hajime Ishihara3,
Tadashi Itoh1; 1Osaka Univ., Japan, 2Osaka Dental
Univ., Japan, 3Osaka Prefecture Univ., Japan.
Temperature dependence of degenerate fourwave
mixing spectra of confined excitons in
CuCl thin films was investigated. The
nonlinear optical response was observed even
at room temperature because of the ultrafast
radiative decay.
ThE44
Ultrafast Dynamic Ellipsometry and
Spectroscopies of Laser Shocked Materials,
Shawn McGrane, Cynthia Bolme, Von Whitley,
David Moore; Los Alamos Natl. Lab, USA.
Ultrafast ellipsometry and transient
absorption spectroscopies are used to measure
material dynamics under extreme conditions
of temperature, pressure, and volumetric
compression induced by shock wave loading
with a chirped, spectrally clipped shock drive
pulse.
ThE45
Ultrafast Genration of Dense Dirac Fermions
in Graphene Monolayer: Evidence for Three‐
Particle Coulomb Scattering, Tianqi Li, Liang
Luo, Myron Hupalo, Michael C. Tringides, Jigang
Wang; Dept. of Physics and Astronomy, Ames
Lab, Iowa State Univ., USA. A power law
dependence I1/3 of the amplitude of
femtosecond diffenrential relfecltivity in
highly photo‐excited graphene monolayer
indicates three‐particle decay, allowing for
generation of dense Dirac fermions beyond
phase space filling within 35 fs.
ThE46
Ultrafast Coherent High‐Field Electron
Transport in GaAs, Wilhelm Kuehn1, Peter
Gaal1, Klaus Reimann1, Michael Woerner1,
Thomas Elsaesser1, Rudolf Hey2; 1Max‐Born‐Inst.
für Nichtlineare Optik und Kurzzeitspektroskopie,
Germany, 2Paul‐Drude‐Inst. für Festkörper
Elektronik, Germany. With strong terahertz
pulses we observe at T=300K in GaAs coherent
ballistic electron transport across half the
Brillouin zone. At T=80K we find additionally
terahertz driven tunneling from the valence
into the conduction band.
ThE47
Probing Electron Transfer in
Polymer/Fullerene Blends Using Ultrahigh
Time Resolution Coherent Vibrational
Spectroscopy, Sarah M. Falke1, Daniele Brida2,
Giulio Cerullo2, Christoph Lienau1; 1Inst. für
Physik, Carl von Ossietzky Univ. Oldenburg,
Germany, 2Natl. Lab for Ultrafast and
Ultraintense Optical Science, CNR‐INFM,
Politecnico di Milano, Italy. We report nonlinear
optical spectra of polymer/fullerene‐blends
measured with unprecedented 10‐fs‐time
resolution. Our results suggest that the
photoinduced charge‐generation in such
blends proceeds via a hybrid electronic state
delocalized over the polymer and fullerene
moieties.
ThE48
Intermolecular Correlation Effects in the
Electronic Relaxation Dynamics of Organic
Single Crystals, Brantley A. West1, Jordan M.
Womick1, Ke Jie Tan2, Laurie E. McNeil1, Andrew
M. Moran1; 1Univ. of North Carolina at Chapel
Hill, USA, 2Nanyang Technological Univ.,
Singapore. Nonlinear optical techniques are
used to investigate the influence of specific
thermally driven nuclear motions on <100 fs
electronic relaxation processes in organic
single crystals. Experiments and simulations
suggest the importance of spatial correlated
fluctuations.
ThE49
Light‐Induced Modulation of Ferroelectric
Polarization Probed Using Time‐Resolved XRay
Scattering, Dan Daranciang1, Haidan Wen2,
Matt Highland3, Brad Perkins4, Nathaniel Brandt4,
Keith Nelson4, Jorgen Larsson5, Donald Walko3,
Eric Dufresne3, Paul Fuoss3, Brian Stephenson3,
Aaron Lindenberg1,2; 1SLAC Natl. Accelerator Lab,
USA, 2Stanford Univ., USA, 3Argonne Natl. Lab,
USA, 4MIT, USA, 5Lund Univ., Sweden. Timeresolved
X‐ray diffraction techniques are used
to visualize atomic‐scale displacements within
the unit cell of the nanoscale ferroelectric
PbTiO3. A picosecond all‐optically‐induced
polarization modulation is observed,
associated with a large‐amplitude carrierinduced
increase in the polarization.
ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010

ThE • Poster Session III
Thursday, July 22
3:45 p.m.–6:00 p.m.
Rooftop Garden
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
ThE50
Molecular Vibrational Response of Ice
Layers after Ultrashort‐Laser Excitation of
Metal Surfaces, Juraj Bdžoch1, Martin Wolf1,2,
Christian Frischkorn1; 1Freie Univ. Berlin,
Germany, 2Fritz‐Haber‐Inst. der Max‐Planck‐
Gesellschaft, Germany. Electron injection into
thin, crystalline D2O layers on a Ru(001)
surface after UV excitation has been
investigated using broadband sum‐frequency
generation spectroscopy, whereby a signal
enhancement by several orders of magnitude
is observed.
ThE51
Probing Ultrafast Dynamics of 5f Electrons
in Crystalline UO2, Yong Q. An, Antoinette J.
Taylor, Tomasz Durakiewicz, George Rodriguez;
Los Alamos Natl. Lab, USA. We find the
lifetimes of photoexcited 5f electrons in
crystalline UO2, ~1.2 ns for midgap states and
~2 μs for upper Hubbard band states at low
temperatures, identify magnetic transitions,
and observe picosecond intraband relaxation.
ThE52
Conductivity Dynamics in the Correlated
Metallic State of V2O3, Mengkun Liu1, Brian
Pardo1, Mumtaz M. Qazilbash2, Sun J. Yun3,
Byung G. Chae3, Bong J. Kim3, Dimitri N. Basov2,
Richard D. Averitt1; 1Boston Univ., USA, 2Univ.
of California at San Diego, USA, 3ETRI, Republic
of Korea. We report on time resolved studies of
V2O3 which undergoes a metal‐insulator
transition at ~150K. In metallic state, we
observe coherent terahertz conductivity
oscillations in hundred‐picosecond time scale
following optical excitation with 35‐fs 800nm
pulses.
ThE53
One Dimensional Exciton Diffusion in JAggregates,
Henning Marciniak1, Xue‐Qing Li2,
Frank Würthner2, Stefan Lochbrunner1; 1Univ. of
Rostock, Germany, 2Univ. of Würzburg, Germany.
The annihilation dynamics of excitons in Jaggregates
of substituted perylene bisimides is
investigated by femtosecond absorption
spectroscopy. The comparison with models
shows that the excitons are only mobile along
one dimension.
6:00 p.m.–8:00 p.m. Dinner Break (on your own)
8:00 p.m.–10:00 p.m. Postdeadline Papers Session
NOTES
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
Friday, July 23, 8:30 a.m.–12:00 p.m. Registration Open, Lobby
FA • Surfaces and Interfaces
Friday, July 23
8:30 a.m.–10:15 a.m.
Jean‐Yves Bigot; CNRS, Univ. of Strasbourg, France, Presider
FA1 • 8:30 a.m. Invited
Transient Electronic Structure of Solids and Surfaces Studied with Time‐ and Angle‐Resolved Photoemission, L. Rettig1, R. Cortes1,2, H. A. Dürr3, J.
Fink3, U. Bovensiepen4, Martin Wolf1,2; 1Freie Univ. Berlin, Germany, 2Fritz‐Haber‐Inst. of the Max‐Planck‐Society, Germany, 3Helmholtz‐Zentrum Berlin,
Germany, 4Dept. of Physics, Univ. Duisburg‐Essen, Germany. The dynamics of highly correlated materials are studied by femtosecond time‐ and angleresolved
photoemission spectroscopy. In the new FeAs based superconductors electron‐phonon coupling plays a decisive role leading to strongly
momentum dependent carrier relaxation.
FA2 • 9:00 a.m.
Attosecond‐Time‐Resolved Studies of Electron Dynamics on Surfaces, Stefan Neppl1, Dietrich Menzel1, Peter Feulner1, Ralph Ernstorfer1, Reinhard
Kienberger1, Adrian L. Cavalieri2, Elisabeth Magerl2, Michael Stanislawski2, Nicholas Karpowicz2, Ferenc Krausz2; 1Technical Univ. of Munich, Germany, 2Max‐
Planck‐Inst. of Quantum Optics, Germany. We report on time‐resolved experiments to investigate the attosecond dynamics of photoelectrons generated
by ultra‐short XUV pulses on clean metal surfaces and in well‐defined adsorbate‐metal interfaces.
FA3 • 9:15 a.m.
Nanoscale Imaging of the Interface Dynamics in Polymer Blends by Femtosecond Pump‐Probe Confocal Microscopy, Dario Polli, G. Grancini, T.
Virgili, J. Clark, M. Celebrano, G. Lanzani, G. Cerullo; Politecnico di Milano, Italy. Pump‐probe measurements of phase‐separated conjugated‐polymer
films, combining 150‐fs temporal and 300‐nm spatial resolution, allow one to highlight “dynamical” interfaces, i.e. borders of phase‐separated islands
that behave differently in terms of transient absorption and relaxation dynamics.
FA4 • 9:30 a.m.
Transient 2‐D IR Spectroscopy of Charge Injection at Organic‐Inorganic Interfaces, Wei Xiong, Jennifer E. Laaser, Peerasak Paoprasert, Ryan A.
Franking, Robert J. Hamers, Padma Gopalan, Matrin T. Zanni; Univ. of Wisconsin at Madison, USA. Transient 2‐D IR spectroscopy suppresses the signal of
free electrons injected at organic‐inorganic interfaces, which dominate standard transient spectra. Consequently, vibrational features are better
resolved, permitting study of charge injection from different conformations of dyes.
FA5 • 9:45 a.m.
Ultrafast Phase Change in Ge2Sb2Te5 Induced by Selective Excitation of Coherent Phonons, Kotaro Makino1, Junji Tominaga2, Muneaki Hase1; 1Univ.
of Tsukuba, Japan, 2AIST, Japan. We demonstrate ultrafast phase change from amorphous to crystalline state by selective excitation of coherent
phonons in Ge2Sb2Te5. We have observed phonon frequency shift corresponding to the structural change within 270 fs after photoexcitation.
FA6 • 10:00 a.m.
Coherent Acoustic Phonons in Highly Oriented Bismuth Films Monitored by Femtosecond Electron Diffraction, Germán Sciaini1, Masaki Hada2,
Jiro Matsuo2, Angelo Karantza1, Gustavo Moriena1, R. J. Dwayne Miller1; 1Dept.s of Chemistry and Physics, and Inst. for Optical Sciences, Univ. of Toronto,
Canada, 2Quantum Science Res. Ctr., Kyoto Univ., Japan. Femtosecond electron diffraction opens new vistas for determining elastic properties at
nanoscale. We report on the detection of coherent acoustic phonons generated via fs laser photoexcitation in ultrathin (110)‐highly oriented films of
Bismuth.
10:15 a.m.–10:45 a.m. Coffee Break, Foyer
Anderson Room Hoaglund Room
17th International Conference on Ultrafast Phenomena (UP) • July 18–23, 2010
FB • Strong Field Ionization Dynamics
Friday, July 23
10:45 a.m.–12:15 p.m.
Margaret Murnane; Univ. of Colorado, USA, Presider
FB1 • 10:45 a.m. Invited
Attosecond Angular Streaking and Tunneling Delay Time in Strong Laser Field Ionization, P. Eckle, A. N. Pfeiffer, C. Cirelli, A. Staudte, R. Dörner,
H. G. Muller, Ursula Keller; ETH Zürich, Switzerland. We use attosecond angular streaking to place an intensity‐averaged upper limit of 12 attoseconds
on the tunneling delay time in strong field ionization of a helium atom. This is much shorter than the Keldysh time.
FB2 • 11:15 a.m.
Optical Detection of Attosecond Ionization Dynamics in Transparent Solids, Alexander Mitrofanov1, Aart J. Verhoef1, Evgenii E. Serebryannikov2, Julien
Lumeau3, Leonid B. Glebov3, Aleksei M. Zheltikov2, Andrius Baltuška1; 1Vienna Univ. of Technology, Austria, 2M.V. Lomonosov Moscow State Univ., Russian
Federation, 3Univ. of Central Florida, USA. We demonstrate an all‐optical pump‐probe technique to resolve attosecond ionization dynamics in
transparent solids. First experimental evidence of attosecond ionization dynamics in different materials is presented, and compared to Kerrnonlinearity
and third harmonic generation.
FB3 • 11:30 a.m.
Anomalous Anisotropy in the Explosion of Rare‐Gas Clusters Irradiated with Intense Few‐Cycle Laser Pulses, Eva Skopalová1, Yasin C. El‐Taha1,
Amelle Zaïr1, Matthias Hohenberger1, Emma Springate2, John W. G. Tisch1, Roland A. Smith1, Jonathan P. Marangos1; 1Imperial College London, UK, 2Central
Laser Facility, UK. We report anomalous anisotropy in short pulse driven cluster explosions, with more energetic ions emitted in the direction
perpendicular to the laser polarization. This anisotropy decreases and eventually reverts as the pulse length is increased.
FB4 • 11:45 a.m.
Intense Femtosecond X‐Ray Photoionization Studies of Nitrogen ‐ How Molecules Interact with Light from the LCLS, Matthias Hoener1,2, Li Fang1,
Oleg Kornilov2, Oliver Gessner2, Nora Berrah1; 1Western Michigan Univ., USA, 2Lawrence Berkeley Natl. Lab, USA. Photoionization studies of molecular
nitrogen have been performed using intense femtosecond X‐ray pulses produced by the Linac Coherent Light Source. Partial ion yields and kinetic
energy release spectra reveal a new regime of light‐matter interaction.
FB5 • 12:00 p.m.
Molecular Orbital Imaging Using Strong‐Field Driven Attosecond Emission, Stefan Haessler1, Zsolt Diveki1, Jeremie Caillat2,3, Willem Boutu1, Cecilia
Giovanetti‐Teixeira2,3, Thierry Ruchon1, Thierry Auguste1, Pierre Breger1, Alfred Maquet2,3, Bertrand Carré1, Richard Taieb2,3, Pascal Salières1; 1CEA‐Saclay,
IRAMIS, France, 2UPMC Univ. Paris 06, France, 3CNRS, UMR, France. Advanced characterization of the attosecond emission from aligned N2
molecules allows us to identify multi‐orbital contributions to the generation process. Tomographic reconstruction of the corresponding electronic
wavepacket is performed with Ångström‐spatial and attosecond‐temporal resolution.
Closing Remarks
Friday, July 23
12:30 p.m.–12:45 p.m.