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Spin noise of a polariton laser

I. I. Ryzhov, M. M. Glazov, A. V. Kavokin, G. G. Kozlov, M. Aßmann, P. Tsotsis, Z. Hatzopoulos, P. G. Savvidis, M. Bayer, and V. S. Zapasskii
Phys. Rev. B 93, 241307(R) – Published 22 June 2016

Abstract

We report on experimental study of the exciton-polariton emission (PE) polarization noise below and above the polariton lasing threshold under continuous-wave nonresonant excitation. The experiments were performed with a high-Q graded 5λ/2 GaAs/AlGaAs microcavity with four sets of three quantum wells in the strong-coupling regime. The PE polarization noise substantially exceeded in magnitude the shot-noise level and, in the studied frequency range (up to 650 MHz), had a flat spectrum. We have found that the polarization and intensity noise dependences on the pump power are strongly different. This difference is ascribed to the bosonic stimulation effect in spin-dependent scattering of the polaritons to the condensate. A theoretical model describing the observed peculiarity of the PE polarization noise is proposed.

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  • Received 10 March 2016
  • Revised 16 May 2016

DOI:https://doi.org/10.1103/PhysRevB.93.241307

©2016 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

I. I. Ryzhov1, M. M. Glazov2,1, A. V. Kavokin1,3,4, G. G. Kozlov1, M. Aßmann5, P. Tsotsis6, Z. Hatzopoulos6, P. G. Savvidis6,7, M. Bayer2,5, and V. S. Zapasskii1

  • 1Spin Optics Laboratory, St. Petersburg State University, 1 Ul'anovskaya, Peterhof, St. Petersburg 198504, Russia
  • 2Ioffe Institute, 26 Polytechnicheskaya, St. Petersburg 194021, Russia
  • 3Department of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
  • 4CNR-SPIN, Viale del Politecnico 1, I-00133 Rome, Italy
  • 5Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany
  • 6Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, 71110 Heraklion, Greece
  • 7Department of Materials Science and Technology, University of Crete, P.O. Box 2208, 71003 Heraklion, Greece

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Issue

Vol. 93, Iss. 24 — 15 June 2016

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