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一种带有支节的MIM型表面等离子体T型分束器

A MIM Surface Plasmon T-splitter Based on a Stub Structure

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摘要

基于金属-电介质-金属结构, 提出了一种带有支节的表面等离子体T型分束器, 采用有限时域差分法研究其透射率与结构参量之间的关系.计算结果表明: 改变T型波导中支节的宽度和长度, 输出波导表面等离子体功率周期性变化; 改变支节在T型波导支路中的纵向位置, 金属-电介质-金属波导中表面等离子体分束比周期性变化; 当分束比达到最大(或最小)时, T型分束器实现表面等离子体的定向传播.此外, 采用表面等离子体干涉理论解释了分束比呈周期性变化的原因.

Abstract

A T-shaped splitter of the surface plasmon waveguide with a stub based on metal-insulator-metal structure was proposed. The relationship between transmission and structure parameters was investigated by Finite-difference time-domain method. The simulation results show that the periodical changes of surface plasmons power can be achieved by changing the width and length of stub structure in T-shaped waveguide. Also, the periodical changes of splitting ratio for changes of surface plasmons can be obtained by changing the stub structure position of the output port in the metal-insulator-me waveguide structure. When the splitting ratio get maximum(or minimum), T-shaped splitter can achieve the unidirectional propagation of changes of surface plasmons. Besides, the periodical changes of splitting ratio was explained based on the changes of surface plasmons interference theory.

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中图分类号:TN256

DOI:10.3788/gzxb20144309.0923002

基金项目:国家自然科学基金(Nos. 21206053, 11347196, 11347214, )、江苏省自然科学基金(No. BK2012548)和国家大学生创新训练计划项目(No. 201310295038)资助

收稿日期:2014-01-17

修改稿日期:2014-03-25

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作者单位    点击查看

蒋亚兰:江南大学 理学院, 江苏 无锡 214122
王继成:江南大学 理学院, 江苏 无锡 214122
王跃科:江南大学 理学院, 江苏 无锡 214122
刘红娇:江南大学 理学院, 江苏 无锡 214122
刘诚:江南大学 理学院, 江苏 无锡 214122
高淑梅:江南大学 理学院, 江苏 无锡 214122

联系人作者:蒋亚兰(yalan1212oo@126.com)

备注:蒋亚兰(1990-), 女, 硕士研究生, 主要研究方向为微纳光学器件、表面等离子体光学.

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引用该论文

JIANG Ya-lan,WANG Ji-cheng,WANG Yue-ke,LIU Hong-jiao,LIU Cheng,GAO Shu-mei. A MIM Surface Plasmon T-splitter Based on a Stub Structure[J]. ACTA PHOTONICA SINICA, 2014, 43(9): 0923002

蒋亚兰,王继成,王跃科,刘红娇,刘诚,高淑梅. 一种带有支节的MIM型表面等离子体T型分束器[J]. 光子学报, 2014, 43(9): 0923002

被引情况

【1】陈慧斌,张志东,闫树斌,焦国太. 基于半圆形与矩形谐振腔耦合结构的Fano共振. 光子学报, 2016, 45(8): 823002--1

【2】何丙乾,李永红,曹雅楠,岳凤英. 基于MIM谐振腔内嵌金属方芯结构的可调谐Fano共振. 光子学报, 2018, 47(11): 1123003--1

【3】陆梦佳,王跃科,姚志飞,张春阳. 基于一维随机硅光栅的石墨烯表面等离子体安德森局域. 光子学报, 2019, 48(4): 424001--1

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