Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 23: Poster II

A 23.1: Poster

Donnerstag, 11. März 2010, 16:30–19:00, Lichthof

Strong field ionization, drift and rescattering in extreme ultraviolet laser pulses in the stabilization regime — •Hossein Ebadi, Christoph H. Keitel, and Karen Hatsagortsyan — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

The strong field ionization dynamics of an atom in a strong extreme-ultraviolet radiation field is investigated using numerical solutions of the time-dependent Schrödinger equation. We show new features of the electron above-threshold ionization (ATI) spectra in the stabilization regime. The phase space analysis of the electron distribution after the interaction allows us to identify the rescattering electron’s contribution in the high energy ATI spectra. The latter is different from the well-known rescattering plateau in the case of infrared driving laser field but still explainable in terms of the simpleman model. Moreover, we characterize a rich structure of the electron phase space distribution providing new detailed information on the ionization time evolution. In particular, we demonstrate that the periodic drift of the bound electron wave packet in the highly oscillating field is the reason for periodic bursts of the ionization yield during the interaction. Our findings can be tested in experiments with FLASH laser facility in Hamburg.