Seeger方程及其位错对超晶格光电性质的影响  

Effects of Seeger Equation and its Dislocation on Superlattice Optoelectronic Properties

作　　者：牛银菊[1] 朱策 邵明珠[3] 罗诗裕[3] 

机构地区：[1]东莞理工学院计算机学院,广东东莞523808 [2]重庆警备区自动化研究所,重庆400074 [3]东莞理工学院电子工程学院,广东东莞523808

出　　处：《半导体光电》2013年第4期612-615,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金项目(10947140);广东省自然科学基金项目(10451170003004948);东莞市科技计划项目(2008108101002)

摘　　要：周期介质的特殊性质引起了人们的广泛兴趣,为人们寻找新材料和新光源开辟了全新领域。周期介质的交变应力场决定了超晶格的光电性能。在经典力学框架内,利用广义三角函数的Bessel展开和多尺度法导出了系统的一级近似解;并对强场和弱场情况进行了分析。结果表明,当位错能量大于周期势垒,或位错振幅大于超晶格层厚时,位错可在滑移面内运动实现能量转移与释放,有利于改善超晶格材料的光电性质。Alternating stress field of the periodic media determines the photoelectric properties of superlattice. Within the framework of classical mechanics, 1-order approximate solution of the system was derived by using the Bessel expansion of generalized trigonometric functions and the multi-scale method, and both cases with the strong field and the weak field were discussed. The results indicate that the dislocations motion in the sliding face can realize the energy transfer and release when the dislocation energy is greater than periodic barrier, or its amplitude is greater than the layer thickness of the superlattice. It is useful for improving the photoelectric properties of superlattice.

关 键 词：周期介质 超晶格 位错 光电性质 

分 类 号：O369[理学—流体力学]