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

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Published 15 February 2006 • 2006 EDP Sciences
, , Citation A. L. Ivanov et al 2006 EPL 73 920 DOI 10.1209/epl/i2006-10002-4

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1 Department of Physics and Astronomy, Cardiff University - Cardiff CF24 3YB, UK

2 Department of Physics, University of California at San Diego La Jolla, CA 92093-0319, USA

3 Materials Department, University of California at Santa Barbara Santa Barbara, CA 93106-5050, USA

Dates

  1. Received 18 January 2006
  2. Accepted 30 January 2006
  3. Published
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0295-5075/73/6/920

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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