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Femtosecond physics: Imaging intramolecular forces and nuclear wave functions in small molecules with ultrashort laser and XUV pulses

Date Di, 30.09.2014 - Di, 30.09.2014
Time 9.00 - 12.00
Speaker Uwe Thumm, Professor of Physics, James R. Macdonald Laboratory and Department of Physics, Kansas State University
Location ETH Zurich, Hönggerberg Campus, HPF G6
Program I plan to discuss different interpretations of photoemission spectra and delay times for gaseous and solid targets, based on the comparison of calculated photoelectron (PE) spectra with recent experiments. We examined photoemission time delays and modeled the time-dependent autoionization for the emission of PEs and Auger electrons from atoms and solid surfaces. We scrutinized the effect of the Coulomb interaction between PE and residual ion and compared streaking with Wigner time delays. For photoemission from surfaces and thin films, we found that streaking delays sensitively depend on the electron mean-free path, IR-skin depth, and surface electronic structure. We further investigated the excitation of bulk and surface plasmons during the release of PEs from metal surfaces and scrutinized the influence of the dynamical plasmon response on PE spectra and photoemission time delays.
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Link Uwe Thumm
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