Rostock 2019 – scientific programme

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MO: Fachverband Molekülphysik

MO 22: Posters 3: Cluster, Strong Field Physics, and Experimental Techniques

MO 22.13: Poster

Thursday, March 14, 2019, 16:15–18:15, S Foyer LLM

Imprints of the Molecular Electronic Structure in the Photoelectron Spectra of Strong-Field Ionized Triatomic Model Molecules — •Matthias Paul — Friedrich-Schiller-Universität Jena, Institut für Physikalische Chemie, Helmholtzweg 4 , 07743 Jena

We examine the circular dichroism in the angular distribution (CDAD) of photoelectrons of non-linear triatomic model systems by analyzing their ionization dynamics. For a detailed characterization of the ionization process of our system, we combine quantum dynamical and classical simulation to analyze the evolution of the electronic density during the interaction with circular polarized light. This builds the foundation for an understanding of the complex pattern of the photoelectron momentum distribution (PEMD) and thus the related CDAD effects. By applying a modified version of the strong-field-approximation (SFA) and the classical trajectory Monte Carlo (CTMC) method, we are able to discriminate the influence of the excited states and the long-range Coulomb interaction on the ionization dynamics, and assign their contributions to the characteristic pattern of the PEMDs. Increasing the internuclear distance or changing the symmetry of the potential strongly affects the three-folded structure in the PEMD, as well as the CDAD. Our analysis allows us to assign these modifications to contribution of excited states.