非线性光子晶体环型腔线缺陷波导的慢光特性研究  

Research on Slow Light Characteristics of Nonlinear Photonic Crystal Line Defect Waveguide with Ring-shaped Holes

作　　者：易佳 朱娜[1] YI Jia;ZHU Na(School of Computer Science and Telecommunication Engineering, Jiangsu University, Zhenjiang Jiangsu 212013, CHN)

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》2018年第1期55-57,62,共4页Optoelectronic Technology

摘　　要：线性光子晶体中可获得较低的慢光速度是以牺牲带宽为代价的。本文通过在光子晶体圆环型腔内加入克尔型非线性材料,分别构建以三角晶格和正方晶格排列的非线性环型腔线缺陷波导,利用有限元法对其慢光特性进行了仿真模拟。结果表明:正方晶格具有更好的慢光效应,获得的最佳慢光群速度为0.0055c,在保证10-3c慢光条件下,可达到0.001的相对带宽;与线性光子晶体线缺陷耦合腔波导相比,带宽提高了两倍,实现了具有低群速度、高带宽特性的慢光效果,对进一步发展光子晶体的光缓存有着重要意义。In the linear photonic crystal,the lower slow light speed light can be obtained at the expense of bandwidth.The nonlinear line defect waveguides with ring-shaped-hole arranged in triangular-lattice and square-lattice were constructed by adding Kerr-type nonlinear materials into the photonic crystal ring cavity.The slow-light characteristics were studied by Finite Element Method.The simulation results show that the square lattice has a better slow light effect,and the optimal slow light group velocity is 0.0055 c,which can obtain the relative bandwidth of 0.001 under the condition of 10^-3 c slow light.Compared with the linear photonic crystal line defect coupled-cavity waveguide,the bandwidth is doubled,realizing the slow light effect with low group velocity and high bandwidth,which is of great significance for further development of photonic crystal.

关 键 词：慢光 非线性光子晶体 环型腔 线缺陷 

分 类 号：TN914[电子电信—通信与信息系统]