OPTICAL-ABSORPTION AND EXCITON LINEWIDTHS OF ZN(1-X)CD(X)SE QUANTUM-WELLS

被引：46
|
作者：
YOUNG, PM
RUNGE, E
ZIEGLER, M
EHRENREICH, H
机构：
[1] Division of Applied Sciences, Harvard University, Cambridge
来源：
PHYSICAL REVIEW B | 1994年 / 49卷 / 11期
关键词：
D O I：
10.1103/PhysRevB.49.7424
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Comparison of experimentally determined optical spectra of Zn1-xCdxSe/ZnSe quantum wells with theoretical results for fundamental optical absorption and exciton linewidths is used to determine valence-band offset and properties of exciton features as a function of well width and temperature. The heavy-hole valence-band offset is found to be approximately 90 meV for x = 0.23. The exciton linewidths are analyzed in terms of Gaussian inhomogeneous broadening attributable to expected sample inhomogeneities involving well widths and alloy concentrations and homogeneous broadening associated with exciton-optical-phonon interactions. The linewidths are found to be smaller and larger than the bulk value for narrow (30 angstrom) and wide (200 angstrom) widths, respectively, in agreement with experimental results.
引用
收藏
页码：7424 / 7431
页数：8
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