含缺陷平板光子晶体十字波导传输特性研究  

Transmission Characteristics of Photonic Crystal Cross Waveguide Containing Defect Structures

作　　者：雍振[1] 傅海威[1] 乔学光[2] 李岩[1] 赵大壮[1] 葛朋[1] 

机构地区：[1]西安石油大学光电油气测井与检测教育部重点实验室,陕西西安710065 [2]西北大学,陕西西安710069

出　　处：《光学学报》2009年第4期1070-1074,共5页Acta Optica Sinica

基　　金：国家自然科学基金(60654001;69877025);国家863计划(2007AA032413;2002AA313150);西安市重大技术创新(GG06004)资助

摘　　要：提出一种在光子晶体十字波导中加入点阵缺陷的特殊结构波导。采用时域有限差分法(FDTD)对该结构的导波特性进行数值模拟,计算结果表明:含缺陷结构的光子晶体波导的透射光谱较不含缺陷结构光子晶体波导的透射光谱带宽变得更窄,此结构具有窄带滤波作用。当改变波导中缺陷结构折射率取值时,该波导透射光的中心频率随缺陷介质折射率的增大而线性减小。改变中心缺陷介质柱直径时,该波导透射光波中心频率随介质柱直径的增大也呈逐渐减小趋势。这种光子晶体十字波导可作为一种窄带滤波器、分光器和可调式选频器等器件,具有一定的应用前景。A new kind of photonic crystal cross waveguides with defect structure is propesed. The transmission characteristics are simulated by finite difference time domain method （FDTD）. The obtained results show that the spectrum line-width of transmitted light through the photonic crystal waveguide containing defect structure is much narrower than that in the prototype waveguide without defect structure. This waveguide possesses narrow band filtering function. When the defect medium refractive index is increased, the center frequency of the transmitted spectrum decreases linearly. When the diameter of defect medium center pillar in increased, the center frequency of the transmitted spectrum is reduced. It is expected that this type of defect photonic crystal wave guides may serve as new narrow band filter, light splitter and tunable frequency selector.

关 键 词：光子晶体十字波导 窄带滤波 选频 时域有限差分法 

分 类 号：O436[机械工程—光学工程]