非线性光子晶体环型腔线缺陷波导的慢光特性研究

易佳; 朱娜

doi:doi:10.19453/j.cnki.1005-488x.2018.01.010

光电子技术, 2018, 38 (1): 55, 网络出版: 2018-04-26

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

论文大纲

易佳 ^*朱娜

作者单位

江苏大学计算机科学与通信工程学院, 江苏镇江 212013

慢光非线性光子晶体环型腔线缺陷 slow light nonlinear photonic crystal ring-shaped cavity line defect

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。

Abstract

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 0.0055c, which can obtain the relative bandwidth of 0.001 under the condition of 10-3c 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.

参考文献

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易佳, 朱娜. 非线性光子晶体环型腔线缺陷波导的慢光特性研究[J]. 光电子技术, 2018, 38(1): 55. YI Jia, ZHU Na. Research on Slow Light Characteristics of Nonlinear Photonic Crystal Line Defect Waveguide with Ring-shaped Holes[J]. Optoelectronic Technology, 2018, 38(1): 55.

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