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

Research output

2 Citations (Scopus)

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 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.

Original languageEnglish
Article number195149
Number of pages6
JournalPhysical Review B
Volume97
Issue number19
DOIs
Publication statusPublished - 25 May 2018

Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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