Electronic structure and carrier dynamics in InAs/InP double-cap quantum dots

Patrice Miska (1) , Jacky Even (1) , Xavier Marie (2) , Olivier Dehaese (1)

1 FOTON - Fonctions Optiques pour les Technologies de l'informatiON
2 INSA Toulouse - Institut National des Sciences Appliquées - Toulouse

The carrier dynamics in InAs double-cap quantum dots DC-QDs grown on InP113B are investigated. The shape of these QDs can be controlled during the growth, yielding an emission wavelength of the system of about 1.55 m at room temperature. The DC-QD dynamics is studied by time-resolved photoluminescence experiments at low temperature for various excitation densities. A simplified dynamic model is developed, yielding results consistent with experimental data. This analysis yields the determination of the Auger coefficients and the intradot relaxation time in this system.

Domaines: Optique / photonique

Patrice Miska, Jacky Even, Xavier Marie, Olivier Dehaese. Electronic structure and carrier dynamics in InAs/InP double-cap quantum dots. Applied Physics Letters, 2009, pp.061916. ⟨hal-00492421⟩