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MO: Fachverband Molekülphysik
MO 26: Contributions to SYLC II
MO 26.2: Vortrag
Donnerstag, 5. März 2026, 15:00–15:15, P 110
Dynamical chirality in rotating molecules induced by electron transitions — •Marjan Mirahmadi1, Alexander Gabriel Löhr1, Andres Felipe Ordonez2,3, and Olga Smirnova1,4 — 1Max-Born-Institut, Max-Born-Str. 2A, 12489 Berlin, Germany — 2Department of Physics, Imperial College London, SW7 2BW London, United Kingdom — 3Department of Physics, Freie Universit\"at Berlin, 14195 Berlin, Germany — 4Technische Universität Berlin, Str. des 17. Juni 135, 10623 Berlin, Germany
Although chirality is typically considered a spatial property of an object and depends on its geometrical symmetries such as point inversion and reflection, local chirality arises from a vector tracing a chiral trajectory in time. For instance, locally chiral Lissajous figures of light are known to generate strong enantiosensitive signals in HHG. Inspired by this concept, we introduce locally chiral molecular rotations via rotational wavepackets constructed of few lower rotational states, in contrast to previously demonstrated rotational chirality by using an optical centrifuge.
We then explore the interplay of two locally chiral structures: the induced polarization vector of chiral electron currents and the rotational trajectory of a molecule, both driven by locally chiral fields. We formally investigate how controlled molecular rotation affects the electronic excitations in different ultrafast electronic process. Moreover, including the electron-rotational couplings based on Hund's cases (a) and (b), we provide deeper insight into how electronic currents effect this newly introduced form of rotational chirality.
Keywords: Ultrashort processes; Chiral currents; Rotational dynamics; Photoexcitation; Local Chirality