Dresden 2026 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 26: Poster II

HL 26.48: Poster

Mittwoch, 11. März 2026, 09:30–11:30, P1

PT-Symmetry in Excitonic Spectra of TMDC Monolayers under Influence of Magnetic Fields — •Michiel Snoeken, Andreas Knorr, and Henry Mittenzwey — Nichtlineare Optik und Quantenelektronik, Institut für Physik und Astronomie (IFPA), Technische Universität Berlin, D-10623 Berlin, Germany

Excitons in TMDC monolayers under the influence of an in-plane magnetic field are theoretically studied. We demonstrate that in-plane magnetic fields induce a hybridization between spin-bright and spin-dark exciton transitions, resulting in a brightening of spin-dark excitons in optical experiments. We provide a thorough analytical characterization of the spectrum and demonstrate that, upon including dissipation, such a system can be interpreted as a gain-loss system as described in PT-symmetric quantum mechanics.

Keywords: excitons; PT-symmetry; magnetic fields; spin phenomena