POLAR OPTICAL MODES IN GAAS-ALAS SUPERLATTICES

被引：11
|
作者：
PEREZALVAREZ, R [1 ]
VELASCO, VR [1 ]
GARCIAMOLINER, F [1 ]
机构：
[1] CSIC,INST CIENCIA MAT,E-28006 MADRID,SPAIN
来源：
PHYSICA SCRIPTA | 1995年 / 51卷 / 04期
关键词：
D O I：
10.1088/0031-8949/51/4/015
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The normal modes of GaAs-AlAs superlattices are studied analytically by assuming that each constituent slab is perfectly rigid for the mechanical vibrations with the normal frequencies of the other one. This, which is a very good approximation for GaAs-AlAs, effects a considerable simplification and allows for an analytical study in terms of explicit basis functions which incorporate the symmetries of different modes. An application is made to a 12-12 superlattice. The results display the type of anisotropy of the modes near the zone centre found in micro-Raman experiments.
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收藏
页码：526 / 530
页数：5
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