Polarized Nonequilibrium Bose-Einstein Condensates of Spinor Exciton Polaritons in a Magnetic Field

A. V. Larionov, V. D. Kulakovskii, S. Höfling, C. Schneider, L. Worschech, and A. Forchel
Phys. Rev. Lett. 105, 256401 – Published 14 December 2010

Abstract

The effect of a magnetic field on a spinor exciton-polariton condensate has been investigated. A quenching of a polariton Zeeman splitting and an elliptical polarization of the condensate have been observed at low magnetic fields B<2T. The effects are attributed to a competition between the magnetic field induced circular polarization buildup and the spin-anisotropic polariton-polariton interaction which favors a linear polarization. The sign of the circular polarization of the condensate emission at B<3T is negative, suggesting that a dynamic condensation in the excited spin state rather than the ground spin state takes place in this magnetic field range. From about 2T on, the Zeeman splitting opens and from then on the slope of the circular polarization degree changes its sign. For magnetic fields larger than the 3 T, the upper spin state occupation is energetically suppressed and circularly polarized condensation takes place in the ground state.

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  • Received 9 August 2010

DOI:https://doi.org/10.1103/PhysRevLett.105.256401

The American Physical Society

Authors & Affiliations

A. V. Larionov1, V. D. Kulakovskii1, S. Höfling2, C. Schneider2, L. Worschech2, and A. Forchel2

  • 1Institute of Solid State Physics, RAS, Chernogolovka, 142432 Russia
  • 2Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen Research Center for Complex Material Systems, Universität Würzburg, D-97074 Würzburg, Germany

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Issue

Vol. 105, Iss. 25 — 17 December 2010

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