Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 22: Poster: Interaction with strong or short laser pulses

A 22.15: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.V

Quantum orbit analysis of molecular strong-field photoelectron spectra — •Norbert Weinkauf, Tian-Min Yan, and Dieter Bauer — Institut für Physik, Universität Rostock, 18051 Rostock, Germany

Laser-induced electron diffraction is a promising method for investigating molecular structure. The photoelectron momentum distributions contain a wealth of target information and sensitively depend on the laser parameters and the orientation of the molecule with respect to the laser polarization axis. We investigate photoelectron momentum spectra by solving the time-dependent Schrödinger equation for two-dimensional model molecules. We distinguish atom-like interference effects from the orientation-dependent molecular features. In order to identify Coulomb-effects we compare with the strong-field approximation (SFA) and the recently developed trajectory-based Coulomb-corrected SFA. The latter provides ultimate insight into the underlying quantum dynamics, as each spectral feature may be interpreted in terms of interfering quantum orbits.