SAMOP 2023 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 20: Poster III

MO 20.1: Poster

Donnerstag, 9. März 2023, 16:30–19:00, Empore Lichthof

Photoelectron Circular Dichroism of fenchone induced by coherent broadband laser pulses — •Eric Kutscher, Anton Artemyev, and Philipp Demekhin — Institut für Physik und CINSaT, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany

Angular distributions of photoelectrons ionized by circularly polarized light from randomly oriented chiral molecules are asymmetric with respect to the propagation direction of the light [1]. This Photoelectron Circular Dichroism (PECD) appears also in the multiphoton ionization regime [2], which opens up a possibility for the coherent control of the effect. So far, the quantum control of PECD has only been discussed in a pump-probe excitation scheme with narrowband pulses [3]. Broadband (bb) laser pulses support photons in a large energy interval [4] and can be tailored in their amplitude and phase with pulse-shaping techniques. Here, the multiphoton PECD induced by coherent bb pulses with a 1-3 eV energy spectrum is studied theoretically for R(-)-fenchone molecules with different chirps and intensites of the pulses by utilizing the time-dependent single-center method [5]. Our results confirm a possibility to control the multiphoton PECD by tailored coherent bb pulses.

[1] B. Ritchie, Phys. Rev. A 13, 1411 (1976).

[2] C. Lux et. al., Angew. Chem. Int. Ed. 51, 5001 (2012).

[3] R. E. Goetz et. al., Phys. Rev. Lett. 122, 013204 (2019).

[4] H. Hundertmark et. al., Opt. Express 17, 1919 (2009).

[5] A.N. Artemyev et. al., J. Chem. Phys. 142, 244105 (2015).