J4 ›› 2017, Vol. 34 ›› Issue (3): 333-338.

• 激光技术与器件 • 上一篇    下一篇

基于开口谐振环的多频太赫兹透射特性研究

潘 旭, 李民权, 汪善栋, 周永光, 沈纯纯, 李玄玄   

  1. 安徽大学计算智能与信号处理教育部重点实验室,安徽 合肥 230601
  • 收稿日期:2016-11-09 修回日期:2017-02-27 出版日期:2017-05-28 发布日期:2017-05-22
  • 通讯作者: 李民权(1968-),安徽宿州人,博士,教授,主要研究方向为天线与馈电、微波器件。 E-mail:limq@ahu.edu.cn
  • 作者简介:潘 旭(1991-),安徽淮南人,硕士,研究方向为表面等离子体与微波器件。E-mail:pancy0427@163.com

Transmission characteristics of multi-frequency terahertz based on split ring resonators

  1. Key Laboratory of Intelligent Computing and Signal Processing, Ministry of Education, Anhui University, Hefei 230601, China
  • Received:2016-11-09 Revised:2017-02-27 Published:2017-05-28 Online:2017-05-22

摘要: 通过在双层金属开圆孔阵列并嵌入对称开口谐振环结构,设计了一种新型金属-介质-金属透射增强结构。用电磁仿真软件对该结构的透射特性进行模拟,研究了单元结构的几何参数对透射峰的影响。结果表明:增加开口谐振环可以有效增加透射峰数量,实现了0.2~1.1 THz内的多频超强透射。根据透射峰处金属表面的场分布,透射峰与磁谐振、局域型表面等离子体、传播型表面等离子体、法布里-珀罗谐振及他们之间的杂化耦合有关。结果对深入研究超强透射特性及透射机理具有一定的指导意义,也为太赫兹微波器件设计和性能分析提供了重要参考。

关键词: 薄膜光学;透射增强;太赫兹波;磁谐振;表面等离子体;法布里-珀罗谐振

Abstract: A novel metal-dielectric-metal structure with extraordinary optical transmission(EOT) is designed by punching the circular hole array in double-layer metal and embedding the symmetrical split ring resonators(SRR) in the circular hole. Transmission characteristics of the structure are simulated by the electromagnetic simulation software. Influences of geometrical parameters of the cell structure on the transmission peaks are investigated. Results show that the number of transmission peaks can be increased effectively by increasing SRR,and the multi-frequency enhanced transmission in 0.2~1.1 THz can be realized. According to the field distribution of metal surface at transmission peaks,the transmission peaks are related to the magnetic plasmon resonance(MP), localized surface plasmon(LSP), propagating surface plasmon(PSP), Fabry-Perot resonance(F-P) and the hybrid coupling among them. Results have some guiding significance for the further study of transmission characteristics and transmission mechanism on EOT. It also provides an important reference for the design and performance analysis of terahertz microwave devices.

Key words: thin film optics; extraordinary optical transmission; terahert; magnetic resonance; surface plasmon; Fabry-Perot resonance

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