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- Title
Steady state oscillations of circular currents in concentric polariton condensates.
- Authors
Lukoshkin, Vladimir; Sedov, Evgeny; Kalevich, Vladimir; Hatzopoulos, Z.; Savvidis, P. G.; Kavokin, Alexey
- Abstract
Concentric ring exciton polariton condensates emerging under non-resonant laser pump in an annular trapping potential support persistent circular currents of polaritons. The trapping potential is formed by a cylindrical micropillar etched in a semiconductor microcavity with embedded quantum wells and a repulsive cloud of optically excited excitons under the pump spot. The symmetry of the potential is subject to external control via manipulation by its pump-induced component. In the manuscript, we demonstrate excitation of concentric ring polariton current states with predetermined vorticity which we trace using interferometry measurements with a spherical reference wave. We also observe the polariton condensate dynamically changing its vorticity during observation, which results in pairs of fork-like dislocations on the time-averaged interferogram coexisting with azimuthally homogeneous photoluminescence distribution in the micropillar.
- Subjects
CURRENT fluctuations; POLARITONS; SPHERICAL waves; LASER pumping; QUANTUM wells; VORTEX motion; EXCITON theory
- Publication
Scientific Reports, 2023, Vol 13, Issue 1, p1
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/s41598-023-31520-z