Temperature dependence of the radiative and nonradiative recombination time in GaAs/As quantum-well structures
- 15 August 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 44 (7), 3115-3124
- https://doi.org/10.1103/physrevb.44.3115
Abstract
We report an experimental study of the photoluminescence (PL) properties, after both picosecond and continuous-wave excitation, of GaAs/ As quantum-well structures. The comparison between the PL decay time and the PL integrated intensity allows us to determine the temperature dependence of both the radiative and the nonradiative time constants. We find that the nonradiative processes play an important role and become dominant for T≥100 K. The radiative time constant turns out to be definitely higher than the measured PL decay time and increases by several orders of magnitude as the temperature is raised from T=4 K to room temperature. The experimental results are finally compared with the theories existing in the literature.
Keywords
This publication has 28 references indexed in Scilit:
- Growth temperature dependent radiative relaxation in AlGaAs/GaAs multiple quantum wellsApplied Physics Letters, 1989
- Perpendicular transport of photoexcited electrons and holes in GaAs/AlAs short-period superlattices: Barrier-thickness and temperature dependencePhysical Review B, 1989
- Optical investigations on the mobility of two-dimensional excitons in GaAs/As quantum wellsPhysical Review B, 1989
- Two-dimensional exciton transport in GaAs/GaAlAs quantum wellsApplied Physics Letters, 1988
- Observation of free excitons in room-temperature photoluminescence of GaAs/AlGaAs single quantum wellsApplied Physics Letters, 1988
- Linewidth Dependence of Radiative Exciton Lifetimes in Quantum WellsPhysical Review Letters, 1988
- Linewidth dependence of radiative exciton lifetimes in quantum wellsPhysical Review Letters, 1987
- Nonlinear Optical Properties Of GaAs/GaAlAs Multiple Quantum Well Material: Phenomena And ApplicationsOptical Engineering, 1985
- Excitons in GaAs quantum wellsJournal of Luminescence, 1985
- Free excitons in room-temperature photoluminescence of GaAs-multiple quantum wellsPhysical Review B, 1983