RESONANT-ENERGY RELAXATION OF TERAHERTZ-DRIVEN 2-DIMENSIONAL ELECTRON GASES

被引：126

作者：

ASMAR, NG ^{[1
]}

MARKELZ, AG ^{[1
]}

GWINN, EG ^{[1
]}

CERNE, J ^{[1
]}

SHERWIN, MS ^{[1
]}

CAMPMAN, KL ^{[1
]}

HOPKINS, PF ^{[1
]}

GOSSARD, AC ^{[1
]}

机构：

[1] UNIV CALIF SANTA BARBARA,DEPT ELECT & COMP ENGN,SANTA BARBARA,CA 93106

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 24期

关键词：

D O I：

10.1103/PhysRevB.51.18041

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 AlxGa1-xAs/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. © 1995 The American Physical Society.

引用

页码：18041 / 18044

页数：4

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