Efficient acoustic phonon broadening in single self-assembled InAs/GaAs quantum dots
- 28 December 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 65 (3) , 033313
- https://doi.org/10.1103/physrevb.65.033313
Abstract
We report systematic temperature-dependent measurements of photoluminescence excitation spectra in single self-assembled InAs/GaAs quantum dots. We studied the increase with temperature of the excited-state homogeneous linewidth for different quantum dots. We found a correlation between the acoustic phonon broadening efficiency and the background intensity in the photoluminescence excitation spectra. These results demonstrate the interaction of the discrete quantum dot excited states with a quasicontinuum of states and impose severe limitations on the isolated artificial macroatom scheme for a single quantum dot.Keywords
This publication has 22 references indexed in Scilit:
- Carrier relaxation and quantum decoherence of excited states in self-assembled quantum dotsPhysical Review B, 2001
- Observation of Phonon Bottleneck in Quantum Dot Electronic RelaxationPhysical Review Letters, 2001
- Enhanced phonon-assisted absorption in single InAs/GaAs quantum dotsPhysical Review B, 2001
- Homogeneous linewidth broadening in a single quantum dot at room temperature investigated using a highly sensitive near-field scanning optical microscopePhysical Review B, 2001
- Transition dipole moment of InAs/InGaAs quantum dots from experiments on ultralow-threshold laser diodesApplied Physics Letters, 2000
- Enhanced Polar Exciton-LO-Phonon Interaction in Quantum DotsPhysical Review Letters, 1999
- Strong Electron-Phonon Coupling Regime in Quantum Dots: Evidence for Everlasting Resonant PolaronsPhysical Review Letters, 1999
- Efficient Carrier Relaxation Mechanism in InGaAs/GaAs Self-Assembled Quantum Dots Based on the Existence of Continuum StatesPhysical Review Letters, 1999
- Density of states and phonon-induced relaxation of electrons in semiconductor quantum dotsPhysical Review B, 1997
- Phonon scattering and energy relaxation in two-, one-, and zero-dimensional electron gasesPhysical Review B, 1990