Spin dynamics of a vortical condensate of exciton polaritons in a GaAs microcavity

The temporal dynamics of a spinor exciton-polariton condensate in a high-quality anisotropic GaAs microcavity under pulsed resonant excitation with light possessing a nonzero orbital angular momentum is investigated. The phenomenon of spatial separation of the spin components of the polariton conden...

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Bibliographic Details
Published in:JETP letters 2017-10, Vol.106 (7), p.417-421
Main Authors: Demenev, A. A., Larionov, A. V., Novikov, S. I., Domaretskii, D. R., Kulakovskii, V. D.
Format: Article
Language:English
Subjects:
Angular momentum
Atomic
Biological and Medical Physics
Biophysics
Condensates
Gallium arsenide
Molecular
Optical and Plasma Physics
Optics and Laser Physics
Particle and Nuclear Physics
Physics
Physics and Astronomy
Polaritons
Qualitative analysis
Quantum Information Technology
Solid State Physics
Spin dynamics
Spintronics
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Summary:The temporal dynamics of a spinor exciton-polariton condensate in a high-quality anisotropic GaAs microcavity under pulsed resonant excitation with light possessing a nonzero orbital angular momentum is investigated. The phenomenon of spatial separation of the spin components of the polariton condensate upon pumping with a coherent superposition of two beams with opposite circular polarizations and orbital angular momenta is observed. The key factors for the observation of this effect are the lateral anisotropy of the microcavity that causes a splitting between the linear components of the polariton ground state and the occurrence of opposite orbital angular momenta for the two spin components of the condensate. The experimental results are in qualitative agreement with the theoretical model of the phenomenon developed in JETP Lett. 104 , 827 (2016).
ISSN:0021-3640
1090-6487
DOI:10.1134/S0021364017190055