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Optical anisotropy and pinning of the linear polarization of light in semiconductor microcavities |
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| Authors: | ?. K?opotowski A. Amo I.A. Shelykh M.M. Glazov A.V. Kavokin |
| Affiliation: | a SEMICUAM, Departamento de Física de Materiales, Universidad Autónoma de Madrid, Cantoblanco, E28049 Madrid, Spain b LASMEA, CNRS, Université Blaise-Pascal Clermont Ferrand II, 24, av des Landais, 63177, Aubière, France c St. Petersburg State Polytechnical University, 29, Politechnicheskaya, 195251, St Petersburg, Russia d A.F. Ioffe Physico-Technical Institute, RAS, 26, Politechnicheskaya, 194021, St Petersburg, Russia e Department of Physics and Astronomy, University of Southampton, SO17 1BJ Southampton, UK f Lab. Spectrométrie Physique (CNRS), Université Joseph Fourier 1, F-38402 Grenoble, France |
| Abstract: | We report strong experimental evidence of the optical anisotropy in a CdTe-based microcavity: the polarization of light is pinned to one of the crystallographic axes independently of the polarization of the excitation. The polarization degree depends strongly on the excitation power, reaching almost 100% in the stimulated regime. The relaxation time of the polarization is about 1 ns. We argue that all of this is an effect of a splitting of the polariton doublet at k=0. We consider different sources for the splitting and conclude that the most likely one is optical birefringence in the mirrors and/or the cavity. |
| Keywords: | 78.55.Et 78.47.+p 71.36.+c 72.25.Rb 78.20.Fm |
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