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

Studying ultrafast processes in organic molecules: From UV to XUV and combining experiment with theory

Date Mo, 06.01.2014 - Mo, 06.01.2014
Time 16.45
Speaker Thomas Wolf, PULSE Institute, Stanford University and SLAC National Accelerator Laboratory, USA
Location ETH Zurich, Hönggerberg Campus, HPF G6
Program What happens to small polyenes between photoexcitation and relaxation from the photoexcited state via a conical intersection? Can we observe such processes? In the first part of my talk I want to follow these questions by presenting the results of a combined experimental and theoretical investigation of the molecule hexamethylcyclopentadiene employing time-resolved photoelectron spectroscopy (TRPES) and ab initio multiple spawning simulations on the MS-MR-CASPT2 level of theory. In this molecule, we investigate two general phenomena in excited state dynamics of small polyenes, a seeming spectral shift in time zero of TRPES spectra and an “induction time” prior to excited state depopulation in dynamics simulations. By applying a stepladder-type model, we can connect both phenomena to localization of the dynamics in a specific molecular degree of freedom. This finding seems to be of general value for excited state dynamics of polyenes.
In the second part of my talk, I’m going to show first results from my new group at Stanford University. We are currently completing a time-resolved photoelectron and photoion spectrometer, where we can excite molecules with the second and third harmonic and probe them with high harmonics of our Ti:Sapphire laser system. As a test sample we are using the organic dye perylene. I’m going to show first transient data from excitation at 400 nm and ionization with the 9th harmonic.
Download (75 KB)
(75 KB)
NCCR MUST Office : ETHZ IQE/ULP-HPT H3 | Auguste-Piccard-Hof 1 | 8093 Zurich | E-Mail
The National Centres of Competence in Research (NCCR) are a research instrument of the Swiss National Science Foundation