Erlangen 2022 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 15: Poster 2

MO 15.14: Poster

Mittwoch, 16. März 2022, 16:30–18:30, P

Probing well aligned molecular enviroments on surfaces in the time-domain — •Pascal Scigalla, Christian Schröder, Peter Feulner, and Reinhard Kienberger — Chair for laser and x-ray physics, E11, Technische Universität München, Germany

We report on the photoemission timing measurements of well-aligned ethyl iodine molecules on a platinum crystal surface. The 4d photoemission of iodine is clocked against the Pt5p photoemission, allowing the extraction of an relative photemission delay. As the iodines photoemission in the chosen energy region stems from a giant resonance in the I4d → є f transition its photoemission time is mostly unaffected by its chemical enviroment. Thus any observed change in the photoemission delay can be attributed to changes in the traversed potential landscape of the molecule.

By carefully selecting the detection angle and coverage of the crystal we can reliably change which parts of the molecular potential landscape were traversed by the detected photoelectron wavepackets.

Complementary scattering simulations are then used in order to gain deeper insight into the observations in order to establish photoemission timing experiments as an efficient and accurate means to study molecular environments on surfaces.