Terahertz near-field imaging of electric and magnetic resonances of a planar metamaterial

被引：100

作者：

Bitzer, Andreas ^{[1
]}

Merbold, Hannes ^{[2
]}

Thoman, Andreas ^{[1
]}

Feurer, Thomas ^{[2
]}

Helm, Hanspeter ^{[1
]}

Walther, Markus ^{[1
]}

机构：

[1] Univ Freiburg, Freiburg Mat Res Ctr, D-79104 Freiburg, Germany

[2] Univ Bern, Inst Appl Phys, CH-3012 Bern, Switzerland

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 05期

关键词：

NEGATIVE REFRACTIVE-INDEX; LENS;

D O I：

10.1364/OE.17.003826

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Experimental investigations of the microscopic electric and in particular the magnetic near-fields in metamaterials remain highly challenging and current studies rely mostly on numerical simulations. Here we report a terahertz near-field imaging approach which provides spatially resolved measurements of the amplitude, phase and polarization of the electric field from which we extract the microscopic magnetic near-field signatures in a planar metamaterial constructed of split-ring resonators (SRRs). In addition to studying the fundamental resonances of an individual double SRR unit we further investigate the interaction with neighboring elements. (C) 2009 Optical Society of America

引用

页码：3826 / 3834

页数：9

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