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arXiv · 1709.06530

Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities

V. A. Lukoshkin·V. K. Kalevich·M. M. Afanasiev·K. V. Kavokin·Z. Hatzopoulos·P. G. Savvidis·E. S. Sedov·A. V. Kavokin
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Abstract

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 spherical wave artificially shaped from the emission of the same condensate. 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.

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V. A. Lukoshkin, V. K. Kalevich, M. M. Afanasiev, K. V. Kavokin, Z. Hatzopoulos, P. G. Savvidis, E. S. Sedov, A. V. Kavokin. 2017-09-19. Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities. https://doi.org/10.1103/physrevb.97.195149

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