INTERLAYER T-X SCATTERING IN STAGGERED-ALIGNMENT ALGAAS-ALAS TERNARY ALLOY MULTI-QUANTUM-WELL STRUCTURES

被引：2

作者：

MASUMOTO, Y

MISHINA, T

SASAKI, F

机构：

[1] Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki

来源：

JOURNAL OF LUMINESCENCE | 1990年 / 45卷 / 1-6期

关键词：

Electrons--Scattering - Luminescence - Semiconducting Aluminum Compounds - Spectroscopy; Absorption;

D O I：

10.1016/0022-2313(90)90141-W

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The interlayer Γ-X scattering rate of photoexcited electrons was measured in staggered-alignment type II AlGaAs-AlAs ternary alloy multi-quantum-well structures. The scattering process was directly probed by the femtosecond pump-and-probe spectroscopy. The mean Γ-X scattering time of electrons across the interface at 4.2 K was determined to be 1.0-1.2 ps, which is longer than that observed recently in GaAs-AlAs short period superlattices and is 20 times longer than that observed in bulk GaAs. The slowing mechanism is ascribed to the small penetration of the evanescent Γ electrons into the AlAs barrier layers. © 1990.

引用

页码：189 / 191

页数：3

共 5 条

[1] SUPER-LATTICE BAND-STRUCTURE IN THE ENVELOPE-FUNCTION APPROXIMATION [J].