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.
@article{arxiv.1709.06530,
title = {Persistent circular currents of exciton-polaritons in cylindrical pillar microcavities},
author = {V. A. Lukoshkin and V. K. Kalevich and M. M. Afanasiev and K. V. Kavokin and Z. Hatzopoulos and P. G. Savvidis and E. S. Sedov and A. V. Kavokin},
journal= {arXiv preprint arXiv:1709.06530},
year = {2018}
}
Comments
13 figures, 4 pages, Submitted to the Physical Review Letters