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.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
光致发光
稀磁半导体
超晶格
光学性质
锌碲
photoreflectance, photoluminescence, Raman scattering, strain effect.
