一种紧凑的、可调的、基于缺陷共振的光开关  

A compact and tunable photonic crystal switch based on defect resonance

作　　者：吴芳芳[1] 沈义峰[1] 王永春[1] 韩奎[1] 周杰[1] 张园[1] 陈琼[1] 

机构地区：[1]中国矿业大学理学院物理系,徐州221116

出　　处：《物理学报》2011年第1期678-682,共5页Acta Physica Sinica

基　　金：中国矿业大学校基金(批准号:0K061065)资助的课题~~

摘　　要：采用平面波展开法(PWM)和时域有限差分(FDTD)法,研究光在含点缺陷的光子晶体波导中的传输特性.计算结果表明,通过引入两共振腔(点缺陷),处于共振频率附近的光波将被完全反射回光子晶体波导.由于共振频率随点缺陷的折射率的变化而改变,这种现象可用来设计可调光开关.The transmission characteristics of a 2D photonic crystal waveguide with point defects were investigated by the plane wave expansion method （PWM） and finite difference time domain （FDTD） method. It was found that by introducing two resonant cavities （point defects） in the photonic crystal waveguide,light waves near the resonance frequencies can be totally reflected back to the waveguide. Since the resonance frequencies change with the variation of the refractive index of point defects,this phenomenon may be used to design a tunable optical switch.

关 键 词：光子晶体波导 缺陷共振 光开关 透射率 

分 类 号：TN25[电子电信—物理电子学]