TIME-RESOLVED SPIN-POLARIZATION SPECTROSCOPY IN GAAS/ALGAAS QUANTUM-WELLS

被引：46
|
作者：
ROUSSIGNOL, P
ROLLAND, P
FERREIRA, R
DELALANDE, C
BASTARD, G
VINATTIERI, A
CARRARESI, L
COLOCCI, M
ETIENNE, B
机构：
[1] UNIV FLORENCE,DIPARTIMENTO FIS,I-50125 FLORENCE,ITALY
[2] UNIV FLORENCE,LENS,I-50125 FLORENCE,ITALY
[3] LAB MICROSTRUCT & MICROELECTR,F-92220 BAGNEUX,FRANCE
来源：
SURFACE SCIENCE | 1992年 / 267卷 / 1-3期
关键词：
D O I：
10.1016/0039-6028(92)91154-4
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We present a study of spin relaxation of excitons in a set of nominally undoped GaAs/AlGaAs quantum well (QW) structures by using time-resolved photoluminescence techniques. The initial polarization and the spin relaxation time have been measured varying the excitation energy between the heavy- and light-hole exciton of each well, at a temperature of 4 K. Typical spin relaxation times in the 50-120 ps range are found when increasing the well width from 25 to 90 angstrom; however no dependence of the spin relaxation time on the excitation wavelength has been observed.
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页码：360 / 364
页数：5
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