PUMA
Istituto dei materiali per l'elettronica ed il magnetismo     
Munoz-Matutano G., Gomis J., Alen B., Martinez-Pastor J., Seravalli L., Frigeri P., Franchi S. Exciton, biexciton and trion recombination dynamics in a single quantum dot under selective optical pumping. In: Physica E-Low-Dimensional Systems & Nanostructures, vol. 40 (6) pp. 2100 - 2103. Elsevier Science, 2008.
 
 
Abstract
(English)
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.
DOI: 10.1016/j.physe.2007.09.182
Subject semiconductor quantum dots
micro-photoluminescence
Trion and exciton recombination
molecular beam epitaxial growth
73.63.Kv
81.07.Ta
78.67.Hc


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