四方晶格光子晶体波导的高通滤波特性  

HIGH PASS PROPERTY OF SQUARE LATTICE PHOTONIC CRYSTAL WAVEGUIDES

作　　者：黄声野[1] 史俊锋[1] 王东生[1] 李伟[1] 

机构地区：[1]清华大学精密仪器系精密测量技术及仪器国家重点实验室,北京100084

出　　处：《红外与毫米波学报》2006年第3期179-182,共4页Journal of Infrared and Millimeter Waves

基　　金：国家安全重大基础预研基金(51307)资助项目1.2子专题:光子晶体波导理论研究和结构设计

摘　　要：分析了四方晶格光子晶体波导的高通滤波特性及其与波导宽度的关系,数值计算结果与微波段的实验结果相吻合.当光子晶体波导宽度在大约1.5a^2a(a为晶格常数)的范围时,透过率频谱呈现高通滤波的特性.下限截止频率随波导宽度的增加而减小.分析了光子晶体晶胞的填充率和介电常数比对高通特性的影响.利用高通特性与波导宽度的关系设计了波长-位移传感器,计算表明测量波长的相对误差达到Δλ/λ<0.0061.High pass property and its dependence on waveguide width were investigated theoretically and experimentally for square lattice photonic crystal waveguides. Good correspondences between the numerical and experimental results were shown. The high pass property can be observed while the widths of the waveguides are about 1.5a-2a. The lower limiting frequencies decrease while the widths of waveguides increase. The effect of filling ratio and dielectric constant ratio of the photonic crystal cell on the high pass property was analyzed. A wavelength-displacement sensor was designed and Δλ/λ 〈0.0061 was achieved according to our calculation.

关 键 词：光子晶体 微禁带 高通滤波 波长-位移传感器 

分 类 号：TN256[电子电信—物理电子学]