Darmstadt 2008 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 8: Interaction with intense laser pulses II: Molecules and beyond
A 8.5: Vortrag
Dienstag, 11. März 2008, 15:15–15:30, 3C
Finite-size, geometry, and many-electron effects in strong field ionization — •Dieter Bauer1 and Sergey Popruzhenko1,2 — 1Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 2Moscow State Engineering Physics Institute, Moscow, Russia
We investigate the strong field ionization dynamics of finite-size systems such as metal clusters and C60. By comparing the results from the numerical solution of the time-dependent Schrödinger equation in single active electron approximation with those from time-dependent density functional theory (i.e., the solution of the corresponding time-dependent Kohn-Sham equation) we identify the role of the collective electron motion inside the target system. By comparing, e.g., the results for C60 with those for a metal cluster of the same size we identify the role of the geometry of the target. We find that the non-adiabatic dynamics inside the target may lead to extended cut-offs in the above-threshold ionization spectra which depend on the laser frequency and the target size. The geometry of the target affects the angular distribution of the photoelectrons.