Statistics of quantum dot exciton fine structure splittings and their polarization orientations

S. Seidl, B. D. Gerardot, P. A. Dalgarno, K. Kowalik, A. W. Holleitner, P. M. Petroff, K. Karrai, R. J. Warburton

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

The fine structure splitting of neutral excitons in InGaAs quantum dots is investigated using polarization sensitive photoluminescence. The QDs were grown with an in situ annealing step to shift the emission wavelength to ~ 950 nm. Statistics of the fine structure reveal a large spread in magnitude and little preferential orientation of the polarization axis. We speculate that these findings are due to the redistribution of QD material during the annealing step. © 2007 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)2153-2155
Number of pages3
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number6
DOIs
Publication statusPublished - Apr 2008

Keywords

  • Fine structure
  • Isotropic dipole orientation
  • Quantum dots

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