A d.c. magnetic metamaterial

被引：113

作者：

Magnus, F. ^{[1
]}

Wood, B. ^{[1
]}

Moore, J. ^{[1
]}

Morrison, K. ^{[1
]}

Perkins, G. ^{[1
]}

Fyson, J. ^{[2
]}

Wiltshire, M. C. K. ^{[1
,3
]}

Caplin, D. ^{[1
]}

Cohen, L. F. ^{[1
]}

Pendry, J. B. ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Phys, London SW7 2AZ, England

[2] Kodak Ltd, European Res, Cambridge CB4 0WN, England

[3] Univ London Imperial Coll Sci Technol & Med, Imaging Sci Dept, London W12 0NN, England

来源：

NATURE MATERIALS | 2008年 / 7卷 / 04期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1038/nmat2126

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Electromagnetic metamaterials(1-3) are a class of materials that have been artificially structured on a subwavelength scale. They are currently the focus of a great deal of interest because they allow access to previously unrealizable properties such as a negative refractive index(4). Most metamaterial designs have so far been based on resonant elements, such as split rings(5), and research has concentrated on microwave frequencies and above. Here, we present the first experimental realization of a non-resonant metamaterial designed to operate at zero frequency. Our samples are based on a recently proposed template(6) for an anisotropic magnetic metamaterial consisting of an array of superconducting plates. Magnetometry experiments show a strong, adjustable diamagnetic response when a field is applied perpendicular to the plates. We have calculated the corresponding effective permeability, which agrees well with theoretical predictions. Applications for this metamaterial may include non-intrusive screening of weak d.c. magnetic fields.

引用

页码：295 / 297

页数：3

共 21 条

[1]

Caloz C, 2006, ELECTROMAGNETIC METAMATERIALS: TRANSMISSION LINE THEORY AND MICROWAVE APPLICATIONS: THE ENGINEERING APPROACH, P1

[2] Demagnetizing factors for rectangular prisms [J].