作　　者： ; ; ; ;

机构地区： 江苏大学机械工程学院

出　　处： 《光通信技术》 2010年第6期15-17,共3页

摘　　要： 利用平面波展开法对正方晶格二维光子晶体带隙随结构参数的变化进行了研究,计算结果表明,能带频率随着归一化半径r/a的增大有减小的趋势,带隙宽度是先增大后减小。带隙宽度随介电常数比ε的变大而增加,能带频率有减小的趋势。当格子常数a=0.594μm,r/a=0.16,ε=13时得到能带中心波长为1.55μm,最大能带归一化频率宽度为0.15。 The variations of band gap of two-dimensional rectangular lattice photonic crystal with the structural parameters are investigated by using the plane-wave expansion method, numerical results show that when the normalized radius of dielectric rods increases, the band gap frequency decreases and the width of band gap firstly increases and then declines. Moreover, the width of band gap increases and the mid-gap frequency declines as dielectric constant ratio increases. In particular, when the lattice constant a,normalized radius r/a and dielectric constant ratio are 0.594μm,0.16 and 13, respectively, the corresponding mid-gap wavelength is 1.55μm and the normalized band gap is 0.15.

关 键 词： 光子晶体 带隙 平面波展开法

领　　域： [电子电信]