Origin of the inner ring in photoluminescence patterns of quantum well excitons

  • Ivanov A
  • Smallwood L
  • Hammack A
 et al. 
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Abstract

In order to explain and model the inner ring in photoluminescence (PL) patterns of indirect excitons in GaAs/AlGaAs quantum wells (QWs), we develop a microscopic approach formulated in terms of coupled nonlinear equations for the diffusion, thermalization and optical decay of the particles. The origin of the inner ring is unambiguously identified: it is due to cooling of indirect excitons in their propagation from the excitation spot.

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Authors

  • A. L. Ivanov

  • L. E. Smallwood

  • A. T. Hammack

  • Sen Yang

  • L. V. Butov

  • A. C. Gossard

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