Dual band enhanced transmission through a subwavelength aperture based on two split-ring-resonators

被引：1

作者：

Huang, C. ^{[1
]}

Zhao, Z. ^{[1
]}

Feng, Q. ^{[1
]}

Luo, X. ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China

来源：

APPLIED PHYSICS B-LASERS AND OPTICS | 2010年 / 101卷 / 1-2期

关键词：

EXTRAORDINARY OPTICAL-TRANSMISSION; HOLE ARRAYS; METAMATERIAL; LIGHT;

D O I：

10.1007/s00340-010-4163-y

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Enhanced transmission through a subwavelength aperture is observed at two frequency bands with employment of two split-ring-resonators (SRR) of different sizes. Each of the SRR is excited to produce resonance and the electric field energy localized in its gap and split region can be coupled into a small hole with a radius of 2.3 mm around the respective resonance frequency. The simulation results show that the energy through the small hole is increased at 5.94 GHz (r/lambda (1)=0.045) and 7.03 GHz (r/lambda (2)=0.054), where 1042-fold and 88-fold enhancements are obtained, respectively, in comparison with the case of a single isolated hole. Moreover, it is found that placing two identical SRR structures in front of the hole can realize higher enhanced transmission with respect to the case of only one SRR utilized. The electric field coupling-enhancement mechanism is well described by studying the electric field distribution.

引用

页码：297 / 303

页数：7

共 48 条

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