Abstract
The inner structure of vortices in Bose-Einstein condensates of exciton polaritons is studied theoretically. We show analytically that the healing lengths for the exciton and photon components of exciton-polariton condensate are essentially different. Namely, the exciton healing length may be about two orders of magnitude smaller than the photon healing length. Experimentally, in near-field photoluminescence, the photon part of the exciton-polariton condensate is detected. The suggested theory shows that the cores of experimentally observed vortices are photon cores, and there could be thousands of unobserved exciton polaritons with a strongly reduced photonic fraction inside them.
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