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Keywords:

  • quantum dot;
  • polaron;
  • resonance

Abstract

We theoretically study the optical properties of an InAs/GaAs quantum dot (QD) near the area of the second-order resonance between an electron confined in the QD and two longitudinal optical phonons. We present the absorption spectra of an inhomogeneously broadened QD ensemble and show that the minimal model needed for an accurate description of such a system needs to account for 3-phonon states.

We study also the influence of the QD height to width ratio on the optical properties of the polaron system. The dependence of the width of the resonance and the position of the second-orderresonant feature on the height to width ratio is presented (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)