中文说明：可以计算椭圆形柱光子晶体的禁带结构， 画出禁带结构。目前很多计算光子晶体禁带的代码都是圆形柱晶格的，不过光子晶体的柱形也影响禁带结构。 此代码专门研究椭圆形柱正方晶格的禁带结构
English Description：
You can calculate the elliptical cylinder photonic crystal band gap structure, draw band gap structure. At present, many computing photonic crystal band gap of the code is a circular column lattice, but also affects the cylindrical photonic crystal band gap structure. This code specializes oval column bandgap structure of tetragonal