Ⅱ-Ⅵ族稀磁半导体ZnTe/Zn_(1-x)Mn_xTe超晶格光学性质的研究  

OPTICAL PROPERTIES OF Ⅱ Ⅵ DILUTED MAGNETIC SEMICONDUCTOR ZnTe/Zn 1 x Mn x Te SUPERLATTICES

作　　者：李海涛[1,2,3] 陈辰嘉[1,2,3] 王学忠 刘继周[1,2,3] 孙允希 凌震[1,2,3] 王迅 吕少哲[1,2,3] 孔祥贵 

机构地区：[1]北京大学物理系 [2]复旦大学应用表面物理实验室 [3]中国科学院激发态物理开放实验室

出　　处：《红外与毫米波学报》1999年第2期113-119,共7页Journal of Infrared and Millimeter Waves

基　　金：国家自然科学基金

摘　　要：在１１Ｋ－８０Ｋ温度范围内研究了用ＭＢＥ生长的ＺｎＴｅ／Ｚｎ１－ｘＭｎｘＴｅ超晶格样品的光致发光光谱、光调制反射谱和拉曼散射谱．在考虑了样品中晶格失配所致的应力效应后对激子能级进行了理论计算，并讨论了导带偏移Ｑｃ和平均晶格常数的取值对计算结果的影响，还研究了ｘ值对轻、重空穴激子能级位置的影响．在拉曼散射实验结果中不仅观测到高阶声子（６阶）。The photoluminescence, photoreflectance and Raman spectra of ZnTe/Zn 1 x Mn x Te superlattice samples grown by MBE technique were studied from 11 to 80K.Excitonic subband energy levels were calculated, in which the strain effects due to lattice mismatch were taken into account.The effects of conduction band offset ratio Q c,x value and average lattice constant on the excitonic energy levels were discussed. Multi phonon spectra up to six order phonon overtone and the combination modes of optical phonons between wells and barriers and in barriers were observed by Raman spectra.

关 键 词：光致发光 稀磁半导体 超晶格 光学性质 锌碲 

分 类 号：TN304.22[电子电信—物理电子学] O472.3[理学—半导体物理]