提出并优化了由单排渐变介质波导构成的二维空气孔型光子晶体负折射平板透镜表面的减反层，改善了成像 质量-Proposed and optimized by a single row of two-dimensional gradient dielectric waveguide consisting of negative refraction of air hole photonic crystal slab lens surface anti-reflection layer, impro

使用有限元的方法实现对二维光子晶体的导波模式分析(models.woptics.photonic_crystal)