2维光子晶体中的掺杂效应数值研究
Numerical study of impurity-doping effects in two-dimensional photonic crystals
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摘要: 把平面波展开方法(PWM)用于2维光子晶体掺杂情况下透射特性的研究，计算得到了粗细不同的空气柱掺杂、相同半径不同介质柱掺杂、不同柱体形状掺杂情况下2维光子晶体的透射系数与入射光频率的关系曲线。结果表明2维光子晶体的禁带的宽度、位置、透过率与掺杂体半径、掺杂体介电常数、掺杂体柱体几何形状等因素有关，掺杂因素相差越大透射曲线变化越明显，特别是损耗介质的掺入更使得禁带可调要素增加。Abstract: Influence of doping on transmission properties of two-dimensional photonic crystals is analyzed numerically in the paper. The crystals’ transmission spectra are obtained by numerical calculation with plane wave expansion method. The results show that the width and position of photonic band gaps as well as transmittivities relate to the dielectric constants and the difference between radii of dielectric cylinders. In addition, the width of photonic band gap can be adjusted by changing air cylinder geometry.
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