Bonn 2025 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 14: Polaritonic Effects in Molecular Systems II (joint session MO/Q)
MO 14.5: Vortrag
Mittwoch, 12. März 2025, 12:00–12:15, HS XV
Chirality and Dimensionality in the Ultrastrong Light-matter Coupling Regime — •Rémi Avriller1 and Cyriaque Genet2 — 1University of Bordeaux, CNRS, LOMA, UMR 5798, F-33405 Talence, France. — 2University of Strasbourg and CNRS, CESQ and ISIS, UMR 7006, F-67000 Strasbourg, France
We unveil the key-role of dimensionality in describing chiroptical properties of molecules embedded inside an optical Fabry-P*erot cavity.
For a 2D-layer configuration, we show that the interplay between molecular chirality and spatial dispersion of the cavity-modes, results in a gyrotropic coupling at the origin of a differential shift in polaritonic energy spectra. This differential shift is proportional to the gyrotropic coupling, while for 3D bulk-aggregate configurations it is shown to vanish.
We interpret physically the former 2D-chiral effect by analogy with the classical Newtonian motion of a fictitious particle in presence of 3D restoring force, and static magnetic field. The gyrotropic coupling is shown to directly perturbate the anholonomy angle of the classical trajectories, and the fictitious particle undergoes cyclotron gyrations upon entering the ultrastrong light-matter coupling regime.
Keywords: Chirality; Polaritons; Electronic strong coupling; Cavity