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Title: Ring-shaped polariton lasing in pillar microcavities

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.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Spin Optics Laboratory, State University of Saint-Petersburg, 1, Ulianovskaya, 198504 St-Petersburg (Russian Federation)
  2. (Russian Federation)
  3. IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete (Greece)
  4. (Greece)
  5. (United Kingdom)
Publication Date:
OSTI Identifier:
22277938
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 9; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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