OPTICAL PHENOMENA ACCOMPANYING ELECTRON HEATING IN MULTIPLE-QUANTUM WELLS GAAS-ALGAAS BY A LONGITUDINAL ELECTRIC-FIELD

被引：0
作者：
VOROBEV, LE
DANILOV, SN
ZIBIK, EA
KOCHEGAROV, YV
FIRSOV, DA
TOWE, E
SUN, D
TOROPOV, AA
SHUBINA, TV
机构：
[1] UNIV VIRGINIA, CHARLOTTESVILLE, VA 22903 USA
[2] AF IOFFE PHYS TECH INST, ST PETERSBURG 194021, RUSSIA
来源：
SEMICONDUCTORS | 1995年 / 29卷 / 06期
关键词：
D O I：
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中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Optical phenomena have been studied in a system of selectively doped n-type quantum wells formed by GaAs-AlGaAs heterojunctions. The absorption spectrum was studied for light of two polarizations at wavelengths near 10 mu m during electron transitions between minibands of the conduction band. A study of the interband spectrum of photoluminescence excitation has made it possible to refine the superlattice parameters. Intensity modulation of the beam from a CO2 laser has been observed. Spontaneous emission of light has also been observed near 10 mu m during heating of 2D electrons by an electric field applied along the quantum-well layers. The modulation is different for light polarized perpendicular and parallel to the layers. An electrooptic effect has been observed during electron heating by a longitudinal electric field. The mechanism for the change in optical absorption accompanying electron heating is discussed. (C) 1995 American Institute of Physics.
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页码：588 / 594
页数：7
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