Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities

Article

关键词: BOSE-EINSTEIN CONDENSATION;    LIGHT;   

DOI  :  10.1103/PhysRevB.97.195149

来源: SCIE

【 摘 要 】

We have experimentally observed an eddy current of exciton polaritons arising in a cylindrical GaAs/AlGaAs pillar microcavity under the nonresonant optical pumping. The polariton current manifests itself in a Mach-Zehnder interferometry image as a characteristic spiral that occurs due to the interference of the light emitted by an exciton-polariton condensate with a reference spherical wave. We have experimentally observed the condensates with the topological charges m = +1, m = -1, and m = -2. The interference pattern corresponding to the m = - 2 current represents the twin spiral emerging from the center of the micropillar. The switching between the current modes with different topological charges is achieved by a weak displacement of the pump spot.

【 授权许可】

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