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纳米狭缝耦合金属圆-矩形复合孔阵列结构增强光透射

Extraordinary Optic Transmission of Metallic Circle-rectangular Compound Hole Array with Nano-slit Coupling

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摘要

采用时域有限差分方法研究了纳米狭缝的宽度,圆孔半径、矩形的长和宽对纳米狭缝耦合金属圆 -矩形复合孔阵列结构增强光透射特性的影响。研究发现该结构与圆孔阵列、圆 -矩形复合孔阵列两种结构相比较,光的透射率得到了显著的增加,这表明本文提出的纳米狭缝耦合金属圆 -矩形复合孔阵列结构中的表面等离激元和局域表面等离激元两种模式相互耦合起了关键作用。纳米狭缝宽度是影响光透射的主要因素,纳米狭缝宽度为 55 nm时,透射率达到 89%,半宽度达 129 nm;圆孔半径、矩形孔的长和宽、周围环境介电常数等参数也影响透射率与共振峰位置:随着圆孔半径、矩形孔宽度的增大,透射率明显增强,同时共振峰蓝移;随着矩形孔长度和周围环境介电常数的增加,共振峰有规律的红移。

Abstract

The effects of the radius of the circle, the length and width of the rectangular and the width of the nano-slit on extraordinary optic transmission of metallic circle -rectangular compound hole array with nano-slit coupling are investigated using the finite-difference time-domain method. The results show that, compared to circle hole array and circle-rectangular compound hole array, the transmittance of the optical transmission for the structure is significantly increased, which suggests that coupling effect of surface pasmon polartion and localized surface plasmon by nano-slit is the key role. The main factor that affects the optic transmission is the width of the nano-slit, and the transmittance is 89% and the full width at half maximum is 129 nm when the width of the nano-slit is 55 nm; the parameters such as the radiusm The effects of the radius of the circle, the length and width of the rectangular and the width of the nano-slit on extraordinary optic transmission of metallic circle -rectangular compound hole array with nano-slit coupling are investigated using the finite-difference time-domain method. The results show that, compared to circle hole array and circle-rectangular compound hole array, the transmittance of the optical transmission for the structure is significantly increased, which suggests that coupling effect of surface pasmon polartion and localized surface plasmon by nano-slit is the key role. The main factor that affects the optic transmission is the width of the nano-slit, and the transmittance is 89% and the full width at half maximum is 129 nm when the width of the nano-slit is 55 nm; the parameters such as the radius

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中图分类号:O436

DOI:10.3969/j.issn.1003-501x.2016.08.002

所属栏目:微纳光学

基金项目:国家自然科学基金项目 (11264009,61465004);广西自然科学基金项目 (2013GXNSFAA019338);桂林电子科技大学研究生教育创新计划资助项目 (YJCXS201514)

收稿日期:2015-10-14

修改稿日期:2015-12-23

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岳宏卫:桂林电子科技大学 a.信息与通信学院
邓进丽:桂林电子科技大学 a.信息与通信学院
朱智勇:桂林电子科技大学 a.信息与通信学院
杨宏艳:桂林电子科技大学 b. 计算机科学与工程学院,广西桂林 541004
王宏庆:桂林电子科技大学 a.信息与通信学院
郑龙:桂林电子科技大学 a.信息与通信学院
刘新英:桂林电子科技大学 a.信息与通信学院
肖功利:桂林电子科技大学 a.信息与通信学院广西信息科学实验中心,广西桂林 541004

联系人作者:岳宏卫(guetyhw@163.com)

备注:岳宏卫(1967-),男(汉族),广西贺州人。博士,副教授,主要从事超导电子学器件与毫米波源和微纳器件方面的研究。

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引用该论文

YUE Hongwei,DENG Jinli,ZHU Zhiyong,YANG Hongyan,WANG Hongqing,ZHENG Long,LIU Xinying,XIAO Gongli. Extraordinary Optic Transmission of Metallic Circle-rectangular Compound Hole Array with Nano-slit Coupling[J]. Opto-Electronic Engineering, 2016, 43(8): 7-12

岳宏卫,邓进丽,朱智勇,杨宏艳,王宏庆,郑龙,刘新英,肖功利. 纳米狭缝耦合金属圆-矩形复合孔阵列结构增强光透射[J]. 光电工程, 2016, 43(8): 7-12

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