Formation dynamics of exciton-polariton vortices created by nonresonant annular pumping
Abstract
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.
Citation
Berger , B , Schmidt , D , Ma , X , Schumacher , S , Schneider , C , Höfling , S & Aßmann , M 2020 , ' Formation dynamics of exciton-polariton vortices created by nonresonant annular pumping ' , Physical Review B - Condensed Matter and Materials Physics , vol. 101 , no. 24 , 245309 . https://doi.org/10.1103/PhysRevB.101.245309
Publication
Physical Review B - Condensed Matter and Materials Physics
Status
Peer reviewed
ISSN
1098-0121Type
Journal article
Description
The authors acknowledge financial support by the Deutsche Forschungsgemeinschaft (DFG) through the international collaborative research center TRR142 (grant No. 231447078, project A04) and Heisenberg program (grant No. 270619725) and by the Paderborn Center for Parallel Computing. X.M. further acknowledges support from the NSFC (No. 11804064). The Wurzburg group acknowledges support by the state of Bavaria.Collections
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