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, Journal Name: Physical Review Letters Journal Issue: 16 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

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