Hot-electron relaxation via the emission of GaAs optical modes and AlAs interface modes in GaAs/AlAs multi-quantum wells
- 1 May 1994
- journal article
- Published by IOP Publishing in Semiconductor Science and Technology
- Vol. 9 (5S) , 782-785
- https://doi.org/10.1088/0268-1242/9/5s/104
Abstract
We demonstrate via hot-electron photoluminescence and high-temperature mobility measurements the importance of the AlAs interface mode in the energy relaxation of electrons in GaAs/AlAs multi-quantum wells. A corresponding investigation of a similar GaAs/Al0.24Ga0.76As system illustrates that this is not the case for AlGaAs barrier devices where GaAs modes are the dominant energy relaxation process. The importance of the AlAs interface mode is not simply related to its intrinsic scattering rate but also to its shorter lifetime (compared with GaAs modes). Hot-phonon effects are therefore crucial to a full understanding of the experimental data.Keywords
This publication has 16 references indexed in Scilit:
- Electron-hybridon interaction in a quantum wellPhysical Review B, 1993
- Optical mode hybrids in quantum wells, superlattices and slabsPhysica Scripta, 1993
- Electron-phonon interactions and lattice dynamics of optic phonons in semiconductor heterostructuresPhysical Review B, 1992
- Microscopic calculation of the electron-phonon interaction in quantum wellsPhysical Review B, 1992
- Subpicosecond real-space charge transfer in GaAs/AlAs type II superlatticesSemiconductor Science and Technology, 1992
- Fuchs-Kliewer interface polaritons and their interactions with electrons in GaAs/AlAs double heterostructuresSemiconductor Science and Technology, 1992
- Electron–optical-phonon interactions in ultrathin GaAs/AlAs multiple quantum wellsPhysical Review Letters, 1991
- Many-body theory of energy relaxation in an excited-electron gas via optical-phonon emissionPhysical Review B, 1990
- Electron–optical-phonon interaction in single and double heterostructuresPhysical Review B, 1989
- Electron scattering by confined LO polar phonons in a quantum wellPhysical Review B, 1989