二维光子晶体禁带算法：光子晶体中因周期性结构而存在的频率禁带称为光子禁带，光子禁带的存在是光子晶体具有广泛应用前景的重要原因。 禁带越大，可控光的频带也越宽，因此如何设计合适的晶体结构以获得大的光子禁带一直是研究和应用的重点与热点。-Algorithm for two-dimensional photonic band gap crystals: photonic crystal periodic structure exists because of the frequency band referred to as photonic band gap, the existence of photonic band gap photonic crystals with wide application prospects of important reasons. Larger band gap, the more controlled wide band of light, how to design appropriate crystal structure for a large photonic band gap has been the focus of research and application and hot.