Resonant-energy relaxation of terahertz-driven two-dimensional electron gases
- 15 June 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 51 (24) , 18041-18044
- https://doi.org/10.1103/physrevb.51.18041
Abstract
We present experimental studies of energy loss from quasi-two-dimensional electron gases that are driven to a nonequilibrium steady state by intense, ultrahigh-frequency fields. For the As/GaAs heterostructures studied, longitudinal-optical (LO) phonon emission dominates energy loss across the previously unexplored frequency range from 0.2 to 3.5 THz, at moderate electron temperatures. We find an unexpected resonance in the absorbed power that is consistent with an increase near 0.5 THz in either the net LO phonon emission rate, or in the high-frequency mobility.
Keywords
This publication has 5 references indexed in Scilit:
- Hot-electron transport in GaAs/As quantum-well structuresPhysical Review B, 1992
- The new UCSB free-electron lasersNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1992
- Hot-electron energy relaxation rates in GaAs/GaAlAs quantum wellsSemiconductor Science and Technology, 1989
- Electric field induced heating of high mobility electrons in modulation-doped GaAs-AlGaAs heterostructuresApplied Physics Letters, 1983
- FAR-INFRARED ABSORPTION IN HIGH RESISTIVITY GaAsApplied Physics Letters, 1969