TY - JOUR
T1 - Random population model to explain the recombination dynamics in single InAs/GaAs quantum dots under selective optical pumping
AU - Gomis-Bresco, Jordi
AU - Muñoz-Matutano, Guillermo
AU - Martínez-Pastor, Juan
AU - Alén, Benito
AU - Seravalli, Luca
AU - Frigeri, Paola
AU - Trevisi, Giovanna
AU - Franchi, Secondo
PY - 2011/2
Y1 - 2011/2
N2 - We model the time-resolved and time-integrated photoluminescence of a single InAs/GaAs quantum dot (QD) using a random population description. We reproduce the joint power dependence of the single QD exciton complexes (neutral exciton, neutral biexciton and charged trions). We use the model to investigate the selective optical pumping phenomenon, a predominance of the negative trion observed when the optical excitation is resonant to a nonintentional impurity level. Our experiments and simulations determine that the negative charge confined in the QD after exciting resonance to the impurity level escapes in 10 ns.
AB - We model the time-resolved and time-integrated photoluminescence of a single InAs/GaAs quantum dot (QD) using a random population description. We reproduce the joint power dependence of the single QD exciton complexes (neutral exciton, neutral biexciton and charged trions). We use the model to investigate the selective optical pumping phenomenon, a predominance of the negative trion observed when the optical excitation is resonant to a nonintentional impurity level. Our experiments and simulations determine that the negative charge confined in the QD after exciting resonance to the impurity level escapes in 10 ns.
UR - http://www.scopus.com/inward/record.url?scp=79952272683&partnerID=8YFLogxK
U2 - 10.1088/1367-2630/13/2/023022
DO - 10.1088/1367-2630/13/2/023022
M3 - Article
AN - SCOPUS:79952272683
VL - 13
SP - 1
EP - 17
JO - New Journal of Physics
JF - New Journal of Physics
SN - 1367-2630
M1 - 023022
ER -