Superradiance and enhanced luminescence from ensembles of a few self-assembled quantum dots

Wildan Abdussalam and Paweł Machnikowski
Phys. Rev. B 90, 125307 – Published 12 September 2014

Abstract

We study theoretically the evolution of photoluminescence (PL) from homogeneous and inhomogeneous ensembles of a few coupled quantum dots (QDs). We discuss the relation between signals from a given QD ensemble under strong and weak excitation (full inversion and linear-response regimes): A system homogeneous enough to manifest superradiant emission when strongly inverted shows a nonexponential decay of the PL signal under spatially coherent weak excitation. In an inhomogeneous ensemble, the PL decay is always nearly exponential with a qualitatively different form of the time dependence in the two excitation regimes and with a higher rate under weak excitation.

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  • Received 23 June 2014
  • Revised 21 August 2014

DOI:https://doi.org/10.1103/PhysRevB.90.125307

©2014 American Physical Society

Authors & Affiliations

Wildan Abdussalam1,2 and Paweł Machnikowski1,*

  • 1Institute of Physics, Wrocław University of Technology, 50-370 Wrocław, Poland
  • 2Max-Planck-Institut für Physik Komplexer Systeme, Nöthnitzer Strasse 38, 01187 Dresden, Germany

  • *pawel.machnikowski@pwr.wroc.pl

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Vol. 90, Iss. 12 — 15 September 2014

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