Exciton, biexciton and trion recombination dynamics in a single quantum dot under selective optical pumping

Guillermo Muñoz-Matutano, Jordi Gomis*, Benito Alén, Juan Martínez-Pastor, Luca Seravalli, Paola Frigeri, Secondo Franchi

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Continuous wave- and time-resolved micro-photoluminescence spectroscopy has been performed on single InAs self-assembled quantum dots grown on GaAs. The presence of residual impurities (donors and acceptors) in samples with low dot density opens the possibility to switch from trion to neutral exciton states inside quantum dots by selective optical pumping. We propose a microstate model to describe the recombination dynamics of all the excitonic especies (neutral exciton, positive/negative trion and biexciton) under the considered optical pumping conditions when increasing the excitation power.

Original languageEnglish
Pages (from-to)2100-2103
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume40
Issue number6
DOIs
Publication statusPublished - Apr 2008
Externally publishedYes

Keywords

  • Micro-photoluminescence
  • Microstate theory
  • Optical switching
  • Time-resolved photoluminescence
  • Trion and exciton recombination

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