同轴纳米柱对亚波长金属牛眼结构EOT的调控  

Control of EOT of subwavelength metal bullseye structures by coaxial nano-columns

作　　者：杨泽华 宋阳[2] 陈爽 高亚臣[1] Yang Zehua;Song Yang;Chen Shuang;Gao Yachen(College of Electronic Engineering,Heilongjiang University,Harbin,Heilongjiang 150080,China;Department of Information Engineering,Chaoyang Teachers'College,Chaoyang,Liaoning 122000,China)

机构地区：[1]黑龙江大学电子工程学院,黑龙江哈尔滨150080 [2]辽宁省朝阳师范高等专科学校信息工程系,辽宁朝阳122000

出　　处：《光电工程》2018年第11期48-56,共9页Opto-Electronic Engineering

基　　金：黑龙江省自然科学基金资助项目(F2018027)~~

摘　　要：牛眼结构是一种典型的纳米光学结构。本文设计了一种带有同轴纳米柱的牛眼结构,利用时域有限差分法(FDTD)研究了该结构的增强透射效应。研究发现,柱的半径和高度对透射特性具有显著的影响,恰当选择柱的半径和高度会得到最大的透射强度。另外,牛眼结构对环境折射率有较高的灵敏度。理论分析表明,该种结构的透射增强效应是由局域表面等离激元与表面极化等离激元相互作用产生。这为纳米光学元件的研发与应用提供一个新的思路。The bullseye structure is a classic nano-optical structure.This article designs a new bullseye structure with coaxial nano-pillars.We used the time-domain finite difference method(FDTD)to study the EOT of the structure.Studies show that the radius and height of the column have a significant impact on the transmission characteristics.The proper choice of the radius and height of the column will support the maximum transmission intensity.In addition,the bullseye structure has a higher sensitivity to the environmental refractive index.Theoretical analyses show that the enhancement transmission effect of the structure is caused by the interaction between the local surface plasmon and the surface plasmon polarization.This provides a new idea for the development and application of nano-photonic components.

关 键 词：表面等离激元 光异常透射 牛眼结构 时域有限差分法 

分 类 号：O734[理学—晶体学]