Ursula Keller wins “Swiss Nobel” Marcel Benoist Prize
Farewell: the NCCR MUST ended 
MUST2022 Conference
New scientific highlights
FELs of Europe prize for Jeremy Rouxel
Ruth Signorell wins Doron prize
New FAST-Fellow Uwe Thumm at ETH
International Day of Women and Girls in Science
New scientific highlight
EU XFEL Young Scientist Award for Camila Bacellar,
Prizes for Giulia Mancini and Rebeca Gomez Castillo
Nobel Prize in Chemistry awarded to RESOLV Member Benjamin List
Hans Jakob Wörner invited to give the „New Horizons Solvay Lectures” 
Unusual keynote talk at an international scientific conference
NCCR MUST at Scientifica 2021Science with strong laser fields: the Keldysh tunneling time and the photoelectron circular dichroism
| Date | Mo, 18.11.2013 | |
| Time | 16:45 | |
| Speaker | Prof. Manfred Lein, Institut für Theoretische Physik, Leibnitz Universität Hannover, Hannover, Germany | |
| Location | ETH Zurich, Hönggerberg Campus, HPF G-6 | |
| Program | The Keldysh tunneling time is a concept that can be thought of as an indicator for the degree of nonadiabaticity in laser-induced tunneling ionization. We describe a method to retrieve this tunneling time from measureable two-color high-harmonic generation spectra, similar to the analysis used in the recent experiment by Shafir et al. [Nature 2012]. We apply the method to our data obtained from the numerical solution of the 3D time-dependent Schrödinger equation for a He atom. The retrieved tunneling time is in good agreement with the Keldysh formula evaluated at the instantaneous ionizing field strength. On the application side of strong-field science, we present a theory of the circular dichroism observed in the photoelectron momentum distributions from multiphoton ionization of chiral molecules. The forward-backward asymmetry of the electron emission from camphor and fenchone is compared to recent experimental data by Lux et al. [Angew. Chem. Int. Ed. 2012]. Host: Ursula Keller, Ultrafast Laser Physics, IQE |
|
| Link | Mafred Lein, Leibnitz Universität | |
