TY - JOUR
T1 - Exciton, biexciton and trion recombination dynamics in a single quantum dot under selective optical pumping
AU - Muñoz-Matutano, Guillermo
AU - Gomis, Jordi
AU - Alén, Benito
AU - Martínez-Pastor, Juan
AU - Seravalli, Luca
AU - Frigeri, Paola
AU - Franchi, Secondo
PY - 2008/4
Y1 - 2008/4
N2 - 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.
AB - 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.
KW - Micro-photoluminescence
KW - Microstate theory
KW - Optical switching
KW - Time-resolved photoluminescence
KW - Trion and exciton recombination
UR - http://www.scopus.com/inward/record.url?scp=41349098790&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2007.09.182
DO - 10.1016/j.physe.2007.09.182
M3 - Article
AN - SCOPUS:41349098790
SN - 1386-9477
VL - 40
SP - 2100
EP - 2103
JO - Physica E: Low-dimensional Systems and Nanostructures
JF - Physica E: Low-dimensional Systems and Nanostructures
IS - 6
ER -