Mainz 2026 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 10: Poster – Ultrafast Structural Dynamics

MO 10.2: Poster

Dienstag, 3. März 2026, 17:00–19:00, Philo 1. OG

Laser-Induced Electron Recollision in Molecular Targets Studied with a Reaction Microscope — •Martin Garro Gonzalez, Narayan Kundu, Julian Schröter, Janko Umbach, Horst Rottke, Arne Senftleben, and Jochen Mikosch — Institut für Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany

Laser-driven electron recollision originates from strong-field ionization of atoms, molecules, and solids, where liberated electrons are accelerated by the oscillating laser field and driven back to the parent ion. This process underlies key strong-field phenomena, including non-sequential double ionization, high-harmonic generation, and laser-induced electron diffraction. A question of current interest is in which way electron recollision can be sensitive to the handedness of a chiral molecule. In recent proof of principle experiments, recollision-induced double ionization with elliptically polarized light has been shown to be chiral sensitive, and more recently photoelectron elliptical dichroism, arising from elastic rescattering, has demonstrated high chiral reponse. Here, we report advances in two recollision-driven phenomena. Using a reaction microscope, we investigate recollision-enhanced elliptical dichroism in chiral molecules with femtosecond strong-field studies of fragmentation and double ionization in methyl oxirane and limonene. Second, we will present our advances on controlling intensity- and wavelength-dependent Coulomb explosion of bromoiodomethane, investigating sequential and non-sequential channels.

Keywords: Reaction Microscope; Strong-Field Ionization; Polyatomic Molecules; Chirality; Coulomb Explosion