Journal
PHYSICAL REVIEW B
Volume 97, Issue 19, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.97.195149
Keywords
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Funding
- RFBR [15-52-12018, ICRC TRR160, 16-32-60104, 17-52-10006]
- Saint Petersburg State University [11.34.2.2012]
- EPSRC [EP/M025330/1]
- HORIZON RISE project CoExAn [644076]
- Royal Society [IEC/R2/170227]
- EPSRC [EP/M025330/1] Funding Source: UKRI
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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.
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