supercell

The supercell model for the Bragg fibers is proposed for investigating the mode characteristics and propagation properties.为了研究布拉格光纤的模式特征和传输特性,提出了超格子模型,利用傅里叶级数表示光纤横向折射率分布,利用平面波展开法分析布拉格光纤的能带结构,基于厄米-主斯函数的局域正交函数展开法,从全矢量耦合波动方程出发,得到关于模式传播常量和电场展开系数的本征方程,从而分析布拉格光纤的模式特征。wca汉语字典

A new method for constructing supercell lattice is proposed; with this method the transverse index profile is decomposed into two periodic structures, and the mode field is decomposed using Hermite-Gaussian functions.发展了一种新型超格子的构造方法 ,将光子晶体光纤的横向介电常数表示为两种周期性结构叠加 ,这两种周期性结构分别用余弦函数展开 ;同时将横向电场以Hermite Gaussian函数展开 。wca汉语字典

According to the equivalent definition of semilattice and hyperoperation, some new concepts——hypersemilattice, subhypersemilattice and the ideal of hypersemilattice are given.在此基础上又给出了子超半格和超半格的理想的概念,并且研究了它们的同态象、乘积、交并关系及其等价刻画。wca汉语字典

The concept of squeezing ratio is defined to study the influence of squeezing on the PCF′s birefringence characteristics by supercell lattice method.定义了压缩率的概念,提出了一个可以构建三角格子、压缩三角格子、正方格子和矩形格子光子晶体光纤的模型;基于此压缩率模型,应用超格子构造法研究了压缩对光子晶体光纤双折射特性的影响。wca汉语字典