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 2021Disentangling Long Trajectory Contributions in Two-Colour High Harmonic Generation
| Date | Di, 21.05.2019 | |
| Time | 16:45h | |
| Speaker | Dr. Cornelia Hofmann, MPI Physics of Complex Systems, Dresden, Germany | |
| Location | ETHZ Hönggerberg, HIT F 42 | |
| Program | Abstract:This work investigates High Harmonic Generation (HHG) in gas targets, induced by intense two-colour orthogonally polarized driving fields. Including a weak second harmonic orthogonally polarised to the strong driving IR acts as a displacement gate for returning electron trajectories [1], allowing for a temporally resolved study of the HHG process. We compared classical trajectory Monte Carlo (CTMC) simulations based on a semiclassical model of strong field tunnel ionisation of helium to experimental HHG spectra. The influence of the Coulomb potential coupling the motion along both displacement directions could be investigated by this method.Furthermore, combining the CTMC with an analytical estimate [2] for the accumulated phase mismatch while propagating through a gas target, the relative contribution of long trajectories was studied. Particularly for low harmonic orders, long trajectories seem to influence the observed XUV spectrum even when the experimental setup is chosen to suppress long trajectories and favour phase matching for short trajectories [3]. [1] Shafir, D. et al., Nature 485 (7398), 343 -346 (2012). [2] Balcou, P. et al., Phys. Rev. A, 55, 3204–3210 (1997). [3] Hofmann, C. et al., Appl. Sci. 8, 341 (2018). |
|
| Laser Seminars | ||
