SKM 2023 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 33: Poster II

HL 33.26: Poster

Wednesday, March 29, 2023, 17:00–19:00, P1

Detection of half-vortices in confined polariton condensates — •Yannik Brune, Bernd Berger, and Marc Aßmann — Department of Physics, TU Dortmund, Germany

A half-vortex describes a rotating quantum fluid carrying a spin dependent topological charge. Theory predicts half-vortices as solutions of the spin dependent GPE. We experimentally demonstrate the existence of half-vortices in an all optical circular confined polariton condensate. Therefore we excite a polariton microcavity across the treshhold using a ringlike excitation profile and observe the polariton emission. Finally, we measure the topological charge of the condensate state, using spin filtered OAM sorting [1], and thereby confirm its half vortex character.

[1]Berger et al., Optics Express 26(24):32248 (2018)