基于开口谐振环的多频太赫兹透射特性研究

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

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

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

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/Abstract

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

中图分类号:

O539

潘旭，李民权，汪善栋，周永光，沈纯纯，李玄玄. 基于开口谐振环的多频太赫兹透射特性研究[J]. J4, 2017, 34(3): 333-338.

参考文献

[1]Zhang ping, Wang xinke, Li haitai, et al.Recognition of terahertz spectrum based on the fractal theory[J].量子电子学报, 2007, 24(6):672-677
[2]He Ming xia, Li Jing yan, Liu Guan lin.Progress of terahertz active control functional devices[J].电子测量与仪器学报, 2012, 26(7):567-576
[3]EbbesenTW, LezecHJ, GhaemiHF, et al.Extraordinary optical transmission through sub wavelength hole arrays[J].Nature, 1998, 391(6668):667-669
[4]HayashiS, OkamotoT.Plasmonics:visit the past to know the future[J].Journal of Physics D, 2012, 45(43):1-24
[5]Henri Lezec, Tineke Thio.Diffracted evanescent wave model for enhanced and suppressedoptical transmission through subwavelength hole arrays[J].Opt. Express, 2004, 12(16):3629-3651
[6]BaidaFI, BelkhirA, LabekeDV, et al.Sub-wavelength metallic coaxial waveguides in the optical range:Role of the plasmonic modes[J].Physical Review B, 2006, 74(20):3840-3845
[7]YenTJ, PadillaWJ, FangN,[J]. Terahertz Magnetic Response from Artificial Materials[J].Science, 2004, 303(5663):1494-1496
[8]XiaS, YangD X, LiT, et al.Role of surface plasmon resonant modes in anomalous terahertz transmission through double-layer metal loop arrays[J].Optics Letters, 2014, 39(5):1270-3
[9]EnghetaN. Circuits with light at nanoscales: optical nanocircuits inspired bymetamaterials[J].Science, 2007, 317(5845):1698-1702
[10]ChenCJ, ChenJS, ChenYB.Optical responses from lossymetallic slit arrays under the excitation of a magnetic polariton[J].Journal of the Optical Society, 2011, 28(8):1798-1806
[11]Xia S, Yang D X.Research on surface plasmon modes for terahertz transmission through double-layer metal loop arrays [J].Laser & Infrared（激光与红外）, 2014, 44(8):927-932
[12]DegironA, EbbesenTW.The role of localized surface plasmon modes in the enhanced transmission of periodic subwavelength apertures[J].Journal of Optics A Pure & Applied Optics, 2005, 7(5):5648-5657
[13]Wang Y W, Liu M L, Liu R J, et al.Fabry-Perot resonance on extraordinary transmission through one-dimensional metallic gratings with sub-wavelength under transverse electric wave excitation[J].物理学报, 2011, 60(2):352-356