Journal
PHYSICAL REVIEW B
Volume 101, Issue 24, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.101.245309
Keywords
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Funding
- Deutsche Forschungsgemeinschaft (DFG) through the International Collaborative Research Center [TRR142, 231447078]
- Heisenberg Program [270619725]
- Paderborn Center for Parallel Computing
- NSFC [11804064]
- state of Bavaria
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We study the spontaneous formation of exciton-polariton vortices in an all-optical nonresonantly 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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