EXCITON-POLARITONS IN SUPERLATTICES

被引：89
|
作者：
ANDREANI, LC
机构：
[1] Dipartimento di Fisica A. Volta, Università di Pavia
来源：
PHYSICS LETTERS A | 1994年 / 192卷 / 01期
关键词：
D O I：
10.1016/0375-9601(94)91023-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The nonlocal semiclassical theory of the optical response of excitons in multiple quantum wells is formulated in a transfer-matrix scheme. The theory is applied to a derivation of the dispersion of exciton-polaritons in superlattices. In the long-wavelength limit the polariton dispersion is shown to reduce to that of a light wave in a uniaxial material, described by an effective (local) dielectric tensor: for TE polarization the polariton dispersion is that of the ordinary wave, while for TM polarization the dispersion is that of the extraordinary wave and describes longitudinal-transverse mixed modes. Numerical examples are given for polaritons in GaAs/AlAs superlattices.
引用
收藏
页码：99 / 109
页数：11
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