Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize- for pioneering work in ultrafast lasers
MUST2022 Conference- a great success!
New scientific highlights- by MUST PIs Wörner, Chergui, and Richardson
FELs of Europe prize for Jeremy Rouxel- “Development or innovative use of advanced instrumentation in the field of FELs”
Ruth Signorell wins Doron prizefor pioneering contributions to the field of fundamental aerosol science
New FAST-Fellow Uwe Thumm at ETH- lectures on Topics in Femto- and Attosecond Science
International Day of Women and Girls in Science- SSPh asked female scientists about their experiences
New scientific highlight- by MUST PIs Milne, Standfuss and Schertler
EU XFEL Young Scientist Award for Camila Bacellar,beamline scientist and group leader of the Alvra endstation at SwissFEL
Prizes for Giulia Mancini and Rebeca Gomez CastilloICO/IUPAP Young Scientist Prize in Optics & Ernst Haber 2021
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List- for the development of asymmetric organocatalysis
NCCR MUST at Scientifica 2021- Lightning, organic solar cells, and virtual molecules

Lightwave-driven Quantum Dynamics: Molecular “Selfie” to Floquet Oscillation

Date Mo, 14.10.2019 - Mo, 14.10.2019
Time 16:45h
Speaker Prof. Dr. Jens Biegert ICFO, Institute of Photonic Sciences, Barcelona, Spain
Location ETH Hönggerberg, HPF G6
Program Electron recollision in an intense laser field gives rise to a variety of phenomena, ranging from electron diffraction to coherent soft X-ray emission. We have, over the years, developed intense sources of waveform-controlled mid-IR light to exploit the process with respect to ponderomotive scaling, quantum diffusion and quasi-static photoemission. I will describe how we leverage these aspects to “teach” molecules to take a selfie while undergoing structural change. This permits visualizing for the first time, with combined attosecond temporal and atomic spatial resolution, molecular bond breaking and deprotonation. Furthermore, we achieve isolated attosecond pulses in the soft X-ray water window across the oxygen edge at 543 eV. Accomplishing ultrafast temporal resolution in combination with the soft X-ray’s element and state specificity now provides an entirely new view on the combined electronic and nuclear dynamics in real time. I will show first results in which we resolve the carrier dynamics in a quantum material in real time and within the material’s unit cell. These results provide first insight into the dynamics of molecules and carriers in condensed matter, with the future possibility to address fundamental questions such as the exact nature of the coupling between charge carriers, or carriers and nuclei / lattice.

1) 2D IR-Raman spectroscopy for liquid water [1].
2) Machine learning approach for modeling liquids water [2]
2) 2D electronic vibrational spectroscopies (2DEVS) for non-adiabatic transition system[3-5]

References (PDF:
[1] H. Ito and Y. Tanimura, Simulating 2D IR-Raman and Raman spectroscopies for inter-molecular and intramolecular modes of liquid water, J.Chem.Phys.144, 074201 (2016).(pdf)
[2] S. Ueno and Y. Tanimura, Modeling intermolecular and intramolecular modes of liquid water with using multiple heat baths: Data-mining approach, in preparation.
[3] T. Ikeda and Y. Tanimura, Probing photo isomerization processes by means of multi-dimensional electronic spectroscopy: The multi-state quantum hierarchal Fokker-Planck Equation approach, J. Chem. Phys. 146, 014102 (2017).(pdf)
[4] T.Ikeda and Y.Tanimura, Phase-space wavepacket dynamics of internal conversion via conical intersection: Multi-state q. Fokker-Planck eq. approach, Chem. Phys. 515, 203 (2018). (pdf)
[5] T. Ikeda and Y. Tanimura, Low-Temperature Q. Fokker-Planck and Smoluchowski Equations and Their Extension to Multistate Systems, J. Chem.Theo. Comp.15 2517 (2019). (pdf)
[6] T. Ikeda, Y. Tanimura and A. Dijkstra, Modeling and analyzing a photo-driven molecular motor system: Ratchet dynamics and non-linear optical spectra, J. Chem. Phys. 150, 114103 (2019). (pdf)

2D IR-Raman spectra of liquid water calculated from full MD simulations for (i) 2D Raman-IR-IR, (ii) 2D IR-Raman-IR and (iii) 2D IR-IR-Raman spectroscopies. (Ref. [1])

2D EVS for non-adiabatic dynamics (Ref .3)

Transient absorption spectra of a three-state system (right figure) for an overdamped case obtained from the (i) multi-state quantum Smoluchowski Eq. (MS-QSE-LT) (ii) multi-state classical Smoluchowski Eq. (MS-SE) or Zusman Eq., (iii) fewest switch surface hopping (FSSH) methods, and (iv) Ehrenfest methods, respectively. (Ref. [5])
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