不同介电常数材料光子晶体慢光特性研究  

Research on Slow Light Properties of Photonic Crystal with Different Dielectric Constant Material

作　　者：成超[1] 朱娜[1] 汪杰[1] 颜晓[1] 

机构地区：[1]江苏大学计算机科学与通信工程学院,江苏镇江212013

出　　处：《光电子技术》2011年第3期174-178,共5页Optoelectronic Technology

基　　金：国家自然科学基金资助项目(60702056)

摘　　要：在研究光子晶体慢光波导中,能带结构和色散特性是两个最重要的问题。采用平面波展开法及相关的数学理论推导,研究不同的介电常数材料对光子晶体线缺陷波导中慢光传播性质的影响,对二维线缺陷光子晶体慢光特性进行模拟和计算。仿真结果显示:随着材料介电常数的增大,慢光波导的相对禁带宽度增加,缺陷模式导光频率降低,群速度减小。因此,选择不同介电常数材料的慢光波导,可以控制慢光传输频率以及群速度,并且可以控制光子晶体波导的零色散点和色散平坦性质,从而有效利用其中存在的高色散系数。The band structure and dispersion property are both important in the research of photonic crystal optical waveguide. The property of the line defect in two--dimensional photonic crystal is simulated and calculated using plane wave expansion method and mathematic theory. The simulation results show that the gap bands＇ width was increased as the dielectric constant of material increased, while the light frequency in defect model and the group velocity decreased. Hence, the frequency and the group velocity of slow light can be controlled by using different di- electric constant, as well as the dispersion flat property and zero dispersion. In this way, high dispersion coefficient among the photonic crystal waveguide can be effectively used.

关 键 词：光子晶体 慢光波导 群速度 色散 色散平坦区域 

分 类 号：TN253[电子电信—物理电子学]