慢光在光子晶体弯折波导中的高透射传播  

High transmission of slow light in the photonic crystal waveguide bends

作　　者：杜晓宇[1] 郑婉华[1] 张冶金[1] 任刚[1] 王科[1] 邢名欣[1] 陈良惠[1] 

机构地区：[1]中国科学院半导体研究所纳米光电子实验室,北京100083

出　　处：《物理学报》2008年第11期7005-7011,共7页Acta Physica Sinica

基　　金：国家自然科学基金重点项目(批准号:10634080);国家自然科学基金(批准号:60677046);国家重点基础研究发展计划(973)(批准号:2006CB921700);国家高技术研究发展计划(863)(批准号:2006AA03Z403)资助的课题~~

摘　　要：研究了慢光模式在SOI(silicon-on-insulator)材料光子晶体线缺陷弯折波导中的传输特性.通过优化波导弯折处的结构参数,慢光模式在光子晶体60°与120°弯折波导中的透射率提高10倍以上,归一化透射率分别达到80%和60%以上.为了进一步减慢光速,设计了新颖的高Q值耦合腔弯折波导结构,在归一化透射率达到75%的基础上,光波群速度低至c/170(c为真空光速).研究结果对于增强光子晶体的慢光效应,提高光子晶体慢光器件的微型化和集成化都有一定的积极意义.We present the research on the transmission characteristic of slow-light-mode in the photonic crystal line-defect waveguide bends on SOI.After optimizing the structure parameters in the vicinity of the bends,the normalized transmission efficiency of slow-light-mode through the photonic crystal 60 degree and 120 degree waveguide bends are as high as 80% and 60% respectively,which are 10 times higher than that in the undeformed case.To slow down light further,we design novel coupled cavity waveguide bend structures with high qulity-factor.High normalized transmission efficiency of 75% and low group velocity of c/170（c is the light velocity in vacuum） are realized.These results are beneficial to enhance the slow light effect of photonic crystal structures and improve the miniaturization and integration of photonic crystal slow light devices.

关 键 词：光子晶体 慢光 弯折波导 透射率 

分 类 号：O734[理学—晶体学] TN252[电子电信—物理电子学]