在前人研究的基础上，我们对二维正方晶格和六方晶格光子晶体缺陷的带结构进行了计算。

The band structures of square lattice photonic crystal and hexagonal lattice photonic crystal have been computed in the second chapter.

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用FDTD方法计算了二维情况下正方形复式晶胞光子晶体的光子特性。

Photoelectric properties of two - dimensional photonic crystals of square lattice are calculated by finite different time domain (FDTD) method.

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而光子晶体最简单的结构为圆柱介质正方排列结构，本文介绍了这种结构的平面波算法及其公式推导。

And the simplest structure of Photonic Crystals is the square structure of cylindrical medium. Then this paper introduces the research in this structure with Plane-Wave Expansion Method.

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