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MO: Fachverband Molekülphysik

MO 10: Poster – Chirality

MO 10.3: Poster

Tuesday, March 11, 2025, 14:00–16:00, Tent

Coherent control of circular dichroism in ion yield of chiral molecules — •Sagnik Das, Sudheendran Vasudevan, Nicolas Ladda, Simon Ranecky, Tonio Rosen, Till Jakob Stehling, Fabian Westmeier, Krishna Kant Singh, Arne Senftleben, Jochen Mikosch, Thomas Baumert, and Hendrike Braun — Institut für Physik, Universität Kassel, Heinrich-Plett-Strasse 40, 34132 Kassel, Germany

The use of shaped femtosecond laser pulses is a proven strategy for directing reaction and excitation pathways in molecular systems [1,2]. We have employed shaped femtosecond UV pulses to control the Circular Dichroism in Ion Yield (CDIY) of 3-methylcyclopentanone [3]. Our findings suggest that pulse duration, linear chirp, and central wavelength of the excitation can control the CDIY. Additionally, the conformer dynamics of the molecule in the excited state may contribute to enhanced CDIY. Currently, we are investigating the control of CDIY in substituted fenchone with pulse parameters similar to those above at visible wavelengths. We aim to extend our control over CDIY by exploiting more flexible and customized pulse shapes through advanced pulse shaping techniques.

[1] A. Assion et al., Science 282, 919-922 (1998)

[2] M. Wollenhaupt & T. Baumert, Faraday Discuss. 153, 9-26 (2011)

[3] S. Das et al., manuscript to be submitted (2024)

Keywords: chirality; femtosecond; coherent control; circular dichroism; femtosecond spectroscopy