Freiburg 2024 – scientific programme

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MO: Fachverband Molekülphysik

MO 23: Poster: Chirality

MO 23.4: Poster

Thursday, March 14, 2024, 17:00–19:00, Tent C

Coherent Control of Photoelectron Circular Dichroism using Two-color Laser Pulses — •Till Stehling, Hangyeol Lee, Sudheendran Vasudevan, Simon Ranecky, Nicolas Ladda, Tonio Rosen, Sagnik Das, Jayanta Ghosh, Hendrike Braun, Arne Senftleben, and Thomas Baumert — Universität Kassel Institut für Physik Heinrich-Plett-Str. 40 34132 Kassel/Germany

We study two-pathway interference in multiphoton ionization of fenchone. By employing two pulses at 380 nm and 440 nm, two distinct (2+1) resonance-enhanced multiphoton ionization (REMPI) pathways via the 3s and the 3p band of fenchone are simultaneously driven. The ionization out of these states can result in the same final continuum state, such that the which-way-information is unknown, and interference can be observed. Photoelectron energy-spectra (PES) show three distinct peaks attributed to different ionization pathways. One of which exhibits a dependence on the temporal delay between the two pulses. These preliminary results may indicate a successful implementation of two-pathway interference during the ionization of fenchone. Future experiments will be concerned with the influence of such interference effects on the photoelectron-circular-dichroism (PECD) of fenchone as they present a possible method to implement control schemes in chiral photophysics.

Keywords: Coherent Control; Interference; fs-Laser; Chirality; Fenchone