空气环型散射元光子晶体慢光特性研究  

Investigation on Slow Light in Photonic Crystal with Air Ring

作　　者：刘文楷[1] 邓建收 董小伟[2] 

机构地区：[1]北方工业大学计算机学院,北京100144 [2]北方工业大学电子信息工程学院,北京100144

出　　处：《中国激光》2016年第1期142-147,共6页Chinese Journal of Lasers

基　　金：北京市自然科学基金(1144010);北京市优秀人才培养项目(2013D005002000002);北京市属高等学校高层次人才引进与培养计划(CITQTCD201304001);北方工业大学科研人才提升计划(CCXZ201307)

摘　　要：以三角晶格空气环光子晶体线波导结构为研究对象，分析了空气环散射元内半径Rin和外半径Rout对波导慢光特性的影响，结果表明Rin/Rout的值在0.15~0.35之间时，能够获得宽带慢光，而且邻近波导两侧首排空气环的外半径Rfout相对于其内半径Rfin对慢光特性的影响更大。当波导两侧首排散射元为空气孔时有利于慢光群速度的降低、为空气环时有利于获得更宽的带宽。当波导两侧首排散射元由空气孔和空气环交替排布构成新型非对称线缺陷波导结构，同时具有了两类散射元的优点，它的群速度与带宽特性优于对称型波导，实现了群速度为0.0086 c、波长范围为6.588 nm 的低色散慢光。The line defect waveguide structure of triangular lattice photonic crystal with air ring is studied. The influence of scatter inner radius Rin and outer radius Rout on the slow light properties is studied. These results indicate that the ratio of Rin/Rout in 0.15~0.35 is favorite to obtain the broadband slow light. The outer radius Rfout of the air ring rows next to the waveguide channel has the more impact on the properties than the inner radius Rfin of the air ring rows next to the waveguide channel. The air holes scattering element on both sides of the waveguide are benefit to reduce the group velocity, while the air rings are helpful to get wider slow light bandwidth. However, the ideal slow light phenomenon is obtained in the asymmetric line defect waveguide which is combined air holes with air rings. The group velocity 0.0086 c which has low dispersion is obtained with the wavelength range of 6.588 nm.

关 键 词：集成光学 光子晶体波导 慢光 带宽 群速度 归一化延时带宽积 

分 类 号：TN252[电子电信—物理电子学]