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设计了一种棋盘格子复式晶格的二维光子晶体:在二维正方形格子中,把截面为正方形的柱子旋转45°,同时在每个原胞中心引入一个圆形截面的柱子构成的光子晶体结构.用平面波展开计算棋盘格子复式晶格的完全光子带隙,结果表明:棋盘格子复式晶格的完全光子带隙的Δω/ω比值几乎是普通棋盘格子的5倍,完全光子带隙的个数也增加.与其他复式结构相比较,发现其最佳的Δω/ω比值是一类粗锐复合结构光子晶体的2.1倍.
A two-dimensional photonic crystal with a checkerboard lattice is designed. In a two-dimensional square lattice, a 45 ° square column is rotated, and a photonic crystal with a circular cross section is introduced at the center of each elementary cell Structure.The complete photonic bandgap of the lattice lattice is calculated by plane wave expansion.The results show that the full photonic bandgap Δω / ω ratio of the chessboard lattice is almost 5 times that of a normal checkerboard lattice, and the total photonic bandgap Compared with other multi-structures, the best Δω / ω ratio was found to be 2.1 times that of a class of coarse-grained composite structured photonic crystals.