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MO: Fachverband Molekülphysik
MO 9: Molecules in Intense Laser Fields
MO 9.4: Talk
Monday, March 11, 2019, 17:00–17:15, S HS 002 Biologie
Probing electronic structure via molecular-frame photoelectron imaging — •Joss Wiese1,2, Sebastian Trippel1,3, and Jochen Küpper1,3,4 — 1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg — 2Department of Chemistry, Universität Hamburg — 3The Hamburg Center for Ultrafast Imaging, Universität Hamburg — 4Department of Physics, Universität Hamburg
Chemical function arises from the interplay among valence electrons. Thus, a view at the evolution of the highest occupied molecular orbitals (HOMOs) during a chemical reaction promises direct insight into the fundamentals of chemistry. For this purpose we employ tomographic molecular-frame photoelectron imaging of spatially confined ensembles of indole strong-field ionised by intense near-infrared laser pulses. Reconstructed static three-dimensional photoelectron distributions in molecular-frame momentum space (MF-ARPES) will be presented. The evaluation of the intensity differentials of these MF-ARPES allows for the mapping of the molecule’s valence electronic structure and enables the investigation of strong-field ionisation phenomena in the intermediate regime between multi-photon and tunneling ionisation.