光子晶体的非严格周期性对其传输特性的影响  

The Transmission Properties of Photonic Crystals without Strict Periodicity

作　　者：朱志宏[1] 叶卫民[1] 季家镕[1] 袁晓东[1] 曾淳[1] 张晚云[1] 

机构地区：[1]国防科技大学光子声子研究中心,长沙410073

出　　处：《光学学报》2004年第6期847-850,共4页Acta Optica Sinica

基　　金：国家 973计划资助课题

摘　　要：将时域有限差分法 (FDTD)用于光子晶体传输特性研究 ,以二维方格子光子晶体TM模为研究对象 ,分别讨论了光子晶体制作过程中圆柱半径和晶格常量误差对光子晶体传输特性和光子晶体器件性能的影响。研究表明 ,圆柱半径和晶格常量的误差越大 ,光子晶体的带隙效果越差 ,在一定的误差范围里 ,光子晶体的传输特性能够被很好地保持 ;由于误差的存在 ,光子晶体点缺陷所形成的微腔的共振频率位置与理想情况发生了漂移 ;加工精度误差对光子晶体器件性能有较大影响。The Finite-difference time-domain (FDTD) method is used for the study of the transmission properties of two-dimensional square lattice photonic crystals. The influence of the errors either of the radius of columns or of the lattice constant on the transmission properties of photonic crystals is investigated. The numerical results indicate: The bigger the errors of the radius of columns and the lattice constant are, the worse the transmission properties of photonic crystals are. Within certain scope of the errors, the transmission properties of photonic crystals can be retained. Because of the errors, the resonance frequency of photonic crystals cavity has an excursion to that of the ideal circumstance. The error of machining accuracy has relatively great influence on the performance of the photonic crystal device.

关 键 词：光子晶体 周期性 光子禁带 误差分析 导波与光纤光学 时域有限差分法 

分 类 号：O734[理学—晶体学] TN25[电子电信—物理电子学]