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

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.

preprint2020arXivOpen access
Bernd BergerDaniel SchmidtXuekai MaStefan SchumacherChristian SchneiderSven HöflingMarc Aßmann
physics.opticscond-mat.quant-gas
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Bernd BergerDaniel SchmidtXuekai MaStefan SchumacherChristian SchneiderSven HöflingMarc Aßmann

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