函数缺陷对波导带隙结构的调制  

Modulation of waveguide bandgap structure by function point defect

作　　者：吴向尧[1] 屈春宏 熊圣洁 马美玲 刘掌辉 王梦飞 王保亮 王艺洁 宋雨生 张晓茹[1] WU Xiang-yao;QU Chun-hong;XIONG Sheng-jie;MA Mei-ling;LIU Zhang-hui;WANG Meng-fei;WANG Bao-liang;WANG Yi-jie;SONG Yu-sheng;ZHANG Xiao-ru(College of Physics,Jilin Normal University,Siping 136000,China)

机构地区：[1]吉林师范大学物理学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2019年第2期73-80,共8页Journal of Jilin Normal University:Natural Science Edition

基　　金：吉林师范大学博士科研启动项目(2017005);吉林师范大学研究生创新项目(研创新201627)

摘　　要：在二维函数光子晶体研究的基础上,进一步研究波导中加入两排函数线缺陷时,通过调节函数线缺陷的介质柱介电常数参数值,可实现波导带隙结构的调制情况.本文选取线缺陷介质柱介电常数函数形式为εr(r)=kr+b,其中,k为函数系数,b为参数.上述参量的变化,可由电光效应实现,即通过调节外加电场强度和电场分布来实现.当改变函数线缺陷介质柱介电常数参数k和b的值时,波导的带隙位置、带隙数目以及电场分布都会发生改变.因此,在波导中加入两排函数线缺陷就可实现带隙结构的调制,得到所需要的带隙结构和电场分布.这些结论可以为光学器件的设计提供理论基础和新的设计思路.In this paper,the modulation of the photonic bandgap structure was studied by adjusting the dielectric constant parameters k and b of the point defect dielectric column when the two-dimensional photonic crystal waveguide added two row of function point defects close to center of the waveguide.The functions form of dielectric constant of dielectric column was ε r=kr+b, in which the parameters k and b could be realized by electro-optical effect.When dielectric constant parameters k and b of the point defect dielectric column changed,the bandgap position,bandgap number,the electric field distribution of the two-dimensional photonic crystal waveguide can be adjusted,i.e.,the photonic bandgap structure and the electric field position can be adjusted by changing the dielectric constant parameters k and b of the point defect dielectric column.This results will provide a theoretical basis and a new design idea for optical device design.

关 键 词：函数点缺陷 带隙结构 波导 

分 类 号：O539[理学—等离子体物理]