Experimental Realization of Strong DC Magnetic Enhancement with Transformation Optics

被引：12

作者：

Liu, Kexin ^{[1
]}

Jiang, Wei ^{[1
]}

Sun, Fei ^{[1
,2
]}

He, Sailing ^{[1
,2
]}

机构：

[1] Zhejiang Univ, JORCEP Sino Swedish Joint Res Ctr Photon, Zhejiang Prov Key Lab Sensing Technol, Ctr Opt & Electromagnet Res, Hangzhou 310058, Zhejiang, Peoples R China

[2] Royal Inst Technol KTH, Sch Elect Engn, Dept Electromagnet Engn, S-10044 Stockholm, Sweden

来源：

PROGRESS IN ELECTROMAGNETICS RESEARCH-PIER | 2014年 / 146卷

基金：

中国国家自然科学基金;

关键词：

FIELD; CLOAK;

D O I：

10.2528/PIER14042704

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：

A passive DC magnetic concentrator is designed with transformation optics (TO) and realized by meta-materials. The passive DC magnetic concentrator based on space compression transformation can greatly enhance the magnetic field in a free space region and can be used for e.g., improving the sensitivity of magnetic sensors and increasing the efficiency of wireless energy transmission. The magnetic property of the medium obtained by TO is extremely anisotropic. To solve this, we use magnetic metamaterials made of alternated high-permeability ferromagnetic (HPF) materials and high-temperature superconductor (HTS) materials. We optimize our structure by conducting simulations using the finite element method (FEM) and experimentally demonstrate a strong, 4.74-time enhancement of the DC magnetic field by our meta-material magnetic concentrator. We also demonstrate that a simplified structure with only HPF materials working at room temperature can still gives 3.84-time enhancement of the DC magnetic field. The experimental results are in good agreement with the numerical simulations based on FEM.

引用

页码：187 / 194

页数：8

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