亚波长十字型MIM等离子波导滤波器  

Subwavelength Cross-shaped MIM Plasmonic Waveguide Filters

作　　者：李伟军[1] 向东[2] 李小华[2] 贾鹏[1] 

机构地区：[1]南华大学数理学院,湖南衡阳421001 [2]南华大学核科学技术学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2012年第4期61-64,共4页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(11205083);湖南省自然科学基金资助项目(12JJ4009)

摘　　要：运用时域有限差分方法(FDTD)方法数值研究了一种亚波长十字型金属—绝缘体—金属(MIM)等离子波导结构的透射属性.结果表明该结构的透射极小值与十字型切口的长度密切相关,表现出良好的滤波性质.十字型切口被直MIM等离子波导分为上下两段,每一段独立构成一个驻波谐振腔.当各段长度独立满足驻波谐振条件时,该结构均会产生透射极小值.A subwavelength cross-shaped metal-insulator-metal （MIM） plasmonic waveguide structure is numerically researched by using the finite-difference time-domain （FDTD） method. The results show that the minima of transmission of the structure have great relationships with the depth of the cross-shaped cut, and the filter capability of the structure is very good. The cross-shaped waveguide, and each part is looked as a cut is separated into two parts by the straight MIM self-existent resonant cavity. When the depths of the each part satisfy with the standing wave resonant condition, the minima of transmission of the cross-shaped MIM wave^uide structure annear.

关 键 词：亚波长 表面等离子激元 等离子波导 滤波器 

分 类 号：O436[机械工程—光学工程] TN252[理学—光学]