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Title: Effects of Bose-Einstein condensation of exciton polaritons in microcavities on the polarization of emitted light

Abstract

It is shown theoretically that Bose condensation of spin-degenerated exciton polaritons results in spontaneous buildup of the linear polarization in emission spectra of semiconductor microcavities and therefore that linear polarization is a good order parameter for the polariton Bose condensation under unpolarized pumping. If spin degeneracy is lifted, an elliptically polarized light is emitted by the polariton condensate. The main axis of the ellipse rotates in time due to self-induced Larmor precession of the polariton condensate pseudospin. The polarization decay time is governed by the dephasing induced by the polariton-polariton interaction and is strongly dependent on the statistics of the condensed state. If the elliptical polarization preexists in the system as a result of pumping, the lifetime of the linear part of the polarization is also extremely sensitive to the degree of circular polarization induced in the system by pumping. This decay time can be used to measure the coherence degree of the condensate as a function of the polarization of the emitted light, as opposed to more conventional but harder particle counting experiments of the Hanbury Brown-Twiss type.

Authors:
; ; ;  [1]
  1. Department of Physics and Astronomy, University of Sheffield, Sheffield, S3 7RH (United Kingdom)
Publication Date:
OSTI Identifier:
20787845
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 73; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevB.73.035315; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1098-0121
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BOSE-EINSTEIN CONDENSATION; EMISSION SPECTRA; EXCITONS; LARMOR PRECESSION; LIFETIME; OPTICAL PUMPING; ORDER PARAMETERS; POLARIZATION; POLARONS; SEMICONDUCTOR MATERIALS; SPIN; VISIBLE RADIATION

Citation Formats

Laussy, Fabrice P, Shelykh, Ivan A, Malpuech, Guillaume, Kavokin, Alexey, LASMEA, UMR 6602 CNRS, Universite Blaise Pascal, 24, av. des Landais, 63177, Aubiere, and Physics and Astronomy School, University of Southampton, Southampton, SO17 1BJ. Effects of Bose-Einstein condensation of exciton polaritons in microcavities on the polarization of emitted light. United States: N. p., 2006. Web. doi:10.1103/PHYSREVB.73.0.
Laussy, Fabrice P, Shelykh, Ivan A, Malpuech, Guillaume, Kavokin, Alexey, LASMEA, UMR 6602 CNRS, Universite Blaise Pascal, 24, av. des Landais, 63177, Aubiere, & Physics and Astronomy School, University of Southampton, Southampton, SO17 1BJ. Effects of Bose-Einstein condensation of exciton polaritons in microcavities on the polarization of emitted light. United States. doi:10.1103/PHYSREVB.73.0.
Laussy, Fabrice P, Shelykh, Ivan A, Malpuech, Guillaume, Kavokin, Alexey, LASMEA, UMR 6602 CNRS, Universite Blaise Pascal, 24, av. des Landais, 63177, Aubiere, and Physics and Astronomy School, University of Southampton, Southampton, SO17 1BJ. Sun . "Effects of Bose-Einstein condensation of exciton polaritons in microcavities on the polarization of emitted light". United States. doi:10.1103/PHYSREVB.73.0.
@article{osti_20787845,
title = {Effects of Bose-Einstein condensation of exciton polaritons in microcavities on the polarization of emitted light},
author = {Laussy, Fabrice P and Shelykh, Ivan A and Malpuech, Guillaume and Kavokin, Alexey and LASMEA, UMR 6602 CNRS, Universite Blaise Pascal, 24, av. des Landais, 63177, Aubiere and Physics and Astronomy School, University of Southampton, Southampton, SO17 1BJ},
abstractNote = {It is shown theoretically that Bose condensation of spin-degenerated exciton polaritons results in spontaneous buildup of the linear polarization in emission spectra of semiconductor microcavities and therefore that linear polarization is a good order parameter for the polariton Bose condensation under unpolarized pumping. If spin degeneracy is lifted, an elliptically polarized light is emitted by the polariton condensate. The main axis of the ellipse rotates in time due to self-induced Larmor precession of the polariton condensate pseudospin. The polarization decay time is governed by the dephasing induced by the polariton-polariton interaction and is strongly dependent on the statistics of the condensed state. If the elliptical polarization preexists in the system as a result of pumping, the lifetime of the linear part of the polarization is also extremely sensitive to the degree of circular polarization induced in the system by pumping. This decay time can be used to measure the coherence degree of the condensate as a function of the polarization of the emitted light, as opposed to more conventional but harder particle counting experiments of the Hanbury Brown-Twiss type.},
doi = {10.1103/PHYSREVB.73.0},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 3,
volume = 73,
place = {United States},
year = {2006},
month = {1}
}