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Formation dynamics of exciton polariton vortices created by non-resonant annular pumping

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arxiv 2006.02200 v1 pith:UCSKXZ55 submitted 2020-06-03 physics.optics cond-mat.quant-gas

Formation dynamics of exciton polariton vortices created by non-resonant annular pumping

classification physics.optics cond-mat.quant-gas
keywords formationvorticesannulardynamicsexcitonmodespolaritonprocess
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We study the spontaneous formation of exciton polariton vortices in an all-optical non-resonantly excited annular trap, which is formed by ring-shaped subpicosecond laser pulses. Since the light emitted by these vortices carries orbital angular momentum (OAM) corresponding to their topological charge, we apply a dedicated OAM spectroscopy technique to detect the OAM of the measurement signal with picosecond time resolution. This allows us to identify the formation of OAM modes and investigate the dynamics of the vortex formation process. We also study the power dependence of this process and how the ring diameter influences the formation of OAM modes.

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