Relation between dipole moment and radiative lifetime in interface fluctuation quantum dots

A. Thränhardt, C. Ell, G. Khitrova, H. M. Gibbs

Research output: Contribution to journalArticle

79 Scopus citations

Abstract

A relation between dipole moment and radiative lifetime of quantum dots for arbitrary indices of refraction of the quantum dot and surrounding medium is derived. As limiting cases several formulas already in use are obtained and their correct use is discussed. We proceed to discuss the relation between dipole moment and radiative lifetime in interface fluctuation quantum dots (IFQD's) taking into account nonsphericity effects. This introduces a dependence on the light propagation direction. We calculate how to account for the nonsphericity of an interface fluctuation quantum dot depending on its diameter and well thickness and find that the lifetime of a typical IFQD with a 50 nm diameter is reduced by about 10% due to nonsphericity effects.

Original languageEnglish (US)
Article number035327
Pages (from-to)353271-353276
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number3
StatePublished - Jan 15 2002

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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