摘要
本文应用麦克斯韦方程和适当的边界条件导出了有限的类型—Ⅱ半导体超晶格的集体表面激发色散关系的一个解析表达。对有限的超晶格,所得结果指出:表面等离子激元的能量与这一体系的层厚直接有关,但是临界波矢与它的厚度无关。类型—Ⅱ超晶格的一般化的公式加上适当的条件可化为类型—Ⅰ超晶格的结果。
An analytical expression for dispersion relation is derived for collective surface exitations of model type-11 finite semiconductor superlattices using Maxwell's Equations and appropriate boundary condition.For finite superlattice,the results show that the energy of the surface plasmon is direcsly related to the thickness of such a system and that the critical wavevetcor is independent of its thickness.the general dispertion relations for type-11 superlattices have been generalized,with appropriate conditions,to those fortype-1 superlattices.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
1990年第1期32-36,共5页
Journal of Henan Normal University(Natural Science Edition)
基金
河南省科学技术委员会资助
关键词
半导体
超晶格
电荷密度
色散
激发
superlattice
dispersion relation
critical wave-vector
plasmon
