Adjusting the functionality of terahertz split-ring resonators through geometry

被引：2
作者：
Merbold, Hannes [1 ,2 ]
Bitzer, Andreas [2 ]
Carbone, Fabrizio [3 ]
Murk, Axel [2 ]
Wallauer, Jan [4 ]
Walther, Markus [4 ]
Feurer, Thomas [2 ]
机构：
[1] ABB Switzerland Ltd, Corp Res, Segelhofstr 1K, CH-5405 Baden, Switzerland
[2] Univ Bern, Inst Appl Sci, CH-3012 Bern, Switzerland
[3] Ecole Polytech Fed Lausanne, Fac Basic Sci, CH-1015 Lausanne, Switzerland
[4] Univ Freiburg, Freiburg Mat Res Ctr, D-79104 Freiburg, Germany
来源：
ULTRAFAST PHENOMENA AND NANOPHOTONICS XVI | 2012年 / 8260卷
基金：
瑞士国家科学基金会;
关键词：
THz radiation; metamaterials; split-ring resonators; FIELD ENHANCEMENT; RESONANCES; METAMATERIALS; HYBRIDIZATION;
D O I：
10.1117/12.908107
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We examine planar double split-ring resonators (SRRs) consisting of two concentric rings with either opposite, similar, or asymmetric gap orientation. Depending on the geometry we observe resonance hybridization, metamaterial induced transparency, or the excitation of dark resonances. These properties can be used for SRR based sensing applications, to realize strongly dispersive behavior, or for determining the optical properties of metals. We further find that THz SRRs featuring very narrow gaps on the micro-or nanoscale can provide in-gap enhancement factors of several 10,000, a property particularly useful for the realization of nonlinear THz experiments.
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页数：7
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