Formation dynamics of exciton-polariton vortices created by nonresonant annular pumping

Bernd Berger, Daniel Schmidt, Xuekai Ma, Stefan Schumacher, Christian Schneider, Sven Höfling, Marc Aßmann

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


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.
Original languageEnglish
Article number245309
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number24
Publication statusPublished - 24 Jun 2020


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