Design of plasmonic toroidal metamaterials at optical frequencies

被引：159

作者：

Huang, Yao-Wei ^{[1
]}

Chen, Wei Ting ^{[1
]}

Wu, Pin Chieh ^{[1
,2
]}

Fedotov, Vassili ^{[3
,4
]}

Savinov, Vassili ^{[3
,4
]}

Ho, You Zhe ^{[2
]}

Chau, Yuan-Fong ^{[5
]}

Zheludev, Nikolay I. ^{[3
,4
]}

Tsai, Din Ping ^{[1
,2
,6
,7
]}

机构：

[1] Natl Taiwan Univ, Grad Inst Appl Phys, Taipei 10617, Taiwan

[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[3] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

[4] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, Hants, England

[5] Ching Yun Univ, Dept Elect Engn, Chungli 320, Taiwan

[6] Natl Appl Res Labs, Instrument Technol Res Ctr, Hsinchu 300, Taiwan

[7] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

NEGATIVE REFRACTIVE-INDEX; MAGNETIC RESPONSE;

D O I：

10.1364/OE.20.001760

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Toroidal multipoles are the subject of growing interest because of their unusual electromagnetic properties different from the electric and magnetic multipoles. In this paper, we present two new related classes of plasmonic metamaterial composed of purposely arranged of four U-shaped split ring resonators (SRRs) that show profound resonant toroidal responses at optical frequencies. The toroidal and magnetic responses were investigated by the finite-element simulations. A phenomenon of reversed toroidal responses at higher and lower resonant frequencies has also been reported between this two related metamaterials which results from the electric and magnetic dipoles interaction. Finally, we propose a physical model based on coupled LC circuits to quantitatively analyze the coupled system of the plasmonic toroidal metamaterials. (C) 2012 Optical Society of America

引用

页码：1760 / 1768

页数：9

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