【摘要】 完全带隙的分布决定了二维光子晶体特性,采用平面波展开法对三角形结构二维光子晶体的带隙随结构参数的变化进行了研究,计算结果表明:对于空气孔型二维光子晶体,当介质比εb/εa=13时,最佳归一化半径为r/a=0.48,此时完全带隙底宽度最大,最大完全带隙的宽度△(?)a/2πc=0.0902;当归一化半径固定时, 完全带隙的宽度随介质比的变大而增加。更多还原

【Abstract】 The distribution of complete bandgap determines the propertis of two-dimensional photonic crystal. The complete bandgap with the variation of structure parameters was analysed. The optimal normalized radius is 0.48 for triangular two-dimension air -hole photonic crystal when dielect ric constant ratio εb/εa = 13, and the widest complete bandgap △(?)a/2πc = 0.0902. When the normalized radius is fixed, the larger the dielectric constant ratio is, the wider the complete bandgap will be.更多还原