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Electron and nuclear dynamics in the photoionization of molecules

Date Mo, 15.09.2014 - Mo, 15.09.2014
Time 16.45
Speaker Prof. Dr. Fernando Martin, Departamento de Quimica, Universidad Autonoma de Madrid, Spain
Location ETH Zurich, Hönggerberg Campus, HPF G6
Program The development of attosecond laser pulses allows one to probe the
inner working of atoms, molecules and surfaces on the timescale of
the electronic response. In molecules, attosecond pump-probe
spectroscopy enables investigations of the prompt charge
redistribution and localization that accompany photo-excitation
processes, where a molecule is lifted from the ground Born-
Oppenheimer potential energy surface to one or more excited
surfaces, and where subsequent photochemistry evolves on femtoand
attosecond timescales. In this talk I will present a few theoretical
examples of realistic molecular attosecond pump-probe experiments
in which simple molecules are ionized with a single attosecond pulse
(or a train of attosecond pulses) and are subsequently probed by one
or several infrared or xuv few-cycle pulses. The evolution of the
electronic and nuclear densities in the photo-excited molecule or
remaining molecular ions is calculated with attosecond time-resolution
and is visualized by varying the delay between the pump and probe
pulses. The results of these calculations allow one to explain several
experimental observations as well as to guide future experimental
efforts to uncover ultrafast electron and nuclear dynamics in
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