SAMOP 2023 – scientific programme

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MO: Fachverband Molekülphysik

MO 20: Poster III

MO 20.15: Poster

Thursday, March 9, 2023, 16:30–19:00, Empore Lichthof

Towards probing vibrational dynamics in methyl p-tolyl sulfoxide via time-resolved PECD — •Nicolas Ladda, Sudheendran Vasudevan, Tonio Rosen, Han-gyeol Lee, Sagnik Das, Jayanta Ghosh, Hendrike Braun, Arne Senftleben, and Thomas Baumert — Institut für Physik, Universität Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel, Germany

The goal is to investigate the dynamic change of chiral character upon laser-induced vibrational motion in methyl p-tolyl sulfoxide (MTSO). To this end, we aim to measure the forward/backward asymmetry of the photoelectron angular distribution with respect to the propagation direction of the ionizing circularly polarized light of the randomly oriented chiral molecule, known as photoelectron circular dichroism (PECD) [1]. The vibrational motion - the umbrella motion of the sulfoxide molecule - changes the chiral character of the molecule, which can be investigated by studying the time-resolved PECD with UV femtosecond laser pulses. For this purpose, a two-color pump-probe setup consisting of the 3rd and 4th harmonics of a Ti:Sa laser system is used. The experimental setup has already been tested with static PECD measurements on fenchone and MTSO.

[1] N. Böwering, T. Lischke, B. Schmidtke, N. Müller, T. Khalil, and U. Heinzmann Phys. Rev. Lett. 2001, 86, 1187