运用解析方法分析量子点的应力应变分布  

The Analysis of Strain Distributions in Quantum Dot Structures Using a Analytical Approach

作　　者：封强[1] 俞重远[1] 刘玉敏[1] 杨红波[1] 黄永箴[2] 

机构地区：[1]北京邮电大学理学院 [2]中国科学院半导体研究所,北京100083

出　　处：《北京邮电大学学报》2006年第2期74-77,共4页Journal of Beijing University of Posts and Telecommunications

基　　金：国家"973计划"项目(2003CB314901);国家"863计划"项目(2003AA311070)

摘　　要：运用解析方法对量子点的结构进行分析,通过对积分核函数进行计算,可以得到各种量子点结构的应力应变分布.同时,对常见的金字塔形和圆锥形等量子点的结构进行了具体分析,并且与有限元方法计算得到的结果进行了比较.结果证明,这种方法能更加普遍地得到量子点结构的应力应变分布,提高了计算速度,可以方便地应用于量子点的电子能级计算.An analytical method based on Green＇s function for calculating strain filed in quantum dot structures of arbitrary shape was presented. The method involves the evaluation of a surface integral over the boundary of the quantum dot. The strain distributions for some shapes as pyramid and cone were discussed. Compare to the element method, our method is more straightforward and faster to implement, and it is also particularly well suited as an input step in calculation of the electronic properties of quantum dots.

关 键 词：量子点 应力应变分布 格林函数 

分 类 号：TN248.4[电子电信—物理电子学]