6533b855fe1ef96bd12b0841
RESEARCH PRODUCT
Exciton, biexciton and trion recombination dynamics in a single quantum dot under selective optical pumping
Paola FrigeriJuan P. Martínez-pastorBenito AlénLuca SeravalliJ. GomisGuillermo Muñoz-matutanoS. Franchisubject
PhysicsCondensed Matter::Quantum GasesPhotoluminescenceCondensed Matter::OtherExcitonPhysics::OpticsCondensed Matter PhysicsCondensed Matter::Mesoscopic Systems and Quantum Hall EffectOptical switchAtomic and Molecular Physics and Opticssemiconductor quantum dotsElectronic Optical and Magnetic MaterialsOptical pumpingCondensed Matter::Materials Sciencemicro-photoluminescenceQuantum dotTrionAtomic physicsBiexcitonExcitationdescription
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. © 2007 Elsevier B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-04-01 |