Pinning and Depinning of the Polarization of Exciton-Polariton Condensates at Room Temperature

Journal Article · Fri Apr 23 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.166402· OSTI ID:21410651

Levrat, J; Butte, R; Christian, T; Glauser, M; Feltin, E; Carlin, J -F; Grandjean, N; Read, D; Kavokin, A V; Rubo, Y G ^[1]

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1. Institute of Condensed Matter Physics, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)

A room temperature polariton condensate realized in a microcavity with embedded GaN quantum wells emits linearly polarized light at threshold with the plane of polarization pinned to one of the crystallographic axes. With increasing pumping power, a depinning of the polarization is observed resulting in a progressive decrease of the polarization degree of the emitted light. This depinning is understood in terms of polariton-polariton repulsion competing with the static disorder potential effect. The polarization behavior differs from that of conventional lasers where the polarization degree usually increases as a function of pumping power.

• OSTI ID: 21410651
• Journal Information: Physical Review Letters, Vol. 104, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.104.166402; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTALLOGRAPHY
EMISSION
EXCITONS
GALLIUM NITRIDES
LASERS
OPTICAL PUMPING
POLARIZATION
QUANTUM WELLS
TEMPERATURE RANGE 0273-0400 K
VISIBLE RADIATION
ELECTROMAGNETIC RADIATION
GALLIUM COMPOUNDS
NANOSTRUCTURES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
PUMPING
QUASI PARTICLES
RADIATIONS
TEMPERATURE RANGE