光子晶体慢光波导的设计及传感研究  

Design and sensing research of photonic crystal slow light waveguide

作　　者：韩学文 贾东方[1] 孔德飞 王肇颖[1] 葛春风[1] 杨天新[1] 

机构地区：[1]天津大学精密仪器与光电子工程学院光电信息技术科学教育部重点实验室,天津300072

出　　处：《激光杂志》2017年第12期14-17,共4页Laser Journal

基　　金：国家自然科学基金资助项目(61377078;61575143;61275084)

摘　　要：慢光可以增强与光与物质的相互作用,在非线性光学、光信号处理等领域具有很好的应用前景。设计了一种新型的二维正方晶格光子晶体慢光波导,并对其传感性能进行了研究。在平面波展开法和线缺陷波导的能带理论基础上,调整缺陷通道的梯度,得到了低至0.00142c的群速度。将设计的光子晶体慢光波导应用于折射率传感,在环境折射率为1至1.56的范围内,灵敏度达到2μm/RIU以上,表现出非常好的传感性能,这为二维光子晶体慢光波导在传感领域的应用提供了理论依据。Slow light can enhance the interactions between light and materials, which makes it a good prospect in the fields such as nonlinear optics and optical signal processing. This paper designs a new type of two-dimensional square lattice photonie crystal slow light waveguide and studies the sensing properties. Based on the plane wave expan- sion method and line defect waveguide band theory, the group velocity can be reduced to 0.00142c by adjusting the gradient of defect channel. The designed photonie crystal slow light waveguide is used for refractive index sensing. In the index range from 1 to 1.56, the waveguide shows very good sensing performance with a sensitivity more than 2 μm/ RIU. The result provides a theoretical basis for the two-dimensional photonie crystal slow light waveguide in sensing application.

关 键 词：慢光 光子晶体波导 传感 

分 类 号：TN252[电子电信—物理电子学]