Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 18: Interaction with strong or short laser pulses I
A 18.7: Vortrag
Mittwoch, 16. März 2011, 18:00–18:15, BAR 106
Correlated electron dynamics in high-order harmonic generation from H2 — •Jing Zhao and Manfred Lein — Institut für Theoretische Physik and Centre for Quantum Engineering and Space-Time Research (QUEST), Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover, Germany
High-order harmonic generation from an H2 model molecule is investigated by numerical solution of the two-electron Schrödinger equation. The harmonic spectrum is modulated by both structural and multielectron dynamical interference effects. We reproduce the extrema by a simple model, based on the location of the hole left in the parent ion after ionization, the electronic wave-packet motion between ionization and recombination, and the recombination phase. Thus, the spectrum provides information about the location of the hole. It is found that the minimum at intermediate harmonic orders is mainly due to structural interference, while the minimum near the cutoff region is predominantly due to dynamical interference.