Ring-shaped polariton lasing in pillar microcavities

Journal Article · Fri Mar 07 00:00:00 EST 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4867519· OSTI ID:22277938

Afanasiev, M. M.; Lukoshkin, V. A.; Kavokin, K. V. ^[1]; Tsintzos, S. I. ^[2]; Savvidis, P. G. ^[2]; Kavokin, A. V. ^[1]

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1. Spin Optics Laboratory, State University of Saint-Petersburg, 1, Ulianovskaya, 198504 St-Petersburg (Russian Federation)
2. IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete (Greece)

Optically generated exciton-polaritons in cylindric semiconductor pillar microcavity with embedded GaAs/AlGaAs quantum wells demonstrate a clear polariton lasing regime. When exciting in the center of the pillar, we detect a ring-shaped emission, where the peak of intensity can be separated from the excitation spot by more than 10 μm. The spatial coherence of the ring emission is verified by interferometry measurements. These observations are interpreted by drift of the exciton polariton condensate away from the excitation spot due to its repulsion from the exciton reservoir and by its spatial confinement by the pillar boundary.

• OSTI ID: 22277938
• Journal Information: Journal of Applied Physics, Vol. 115, Issue 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM ARSENIDES
EXCITATION
EXCITONS
GALLIUM ARSENIDES
HETEROJUNCTIONS
INTERFACES
INTERFEROMETRY
POLARONS
QUANTUM WELLS
SEMICONDUCTOR MATERIALS