A Broadband Three-Dimensionally Isotropic Negative-Refractive-Index Medium

被引：26

作者：

Rudolph, Scott Michael ^{[1
]}

Grbic, Anthony ^{[2
]}

机构：

[1] USN, Tact Elect Warfare Div, Res Lab, Washington, DC 20375 USA

[2] Univ Michigan, Dept Elect Engn & Comp Sci, Ann Arbor, MI 48109 USA

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2012年 / 60卷 / 08期

关键词：

Metamaterials; negative index of refraction; negative permeability; periodic structures; super resolution; TRANSMISSION-LINE; METAMATERIAL; DESIGN;

D O I：

10.1109/TAP.2012.2201079

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：

When designing negative-refractive-index (NRI) metamaterials, scientists have struggled to overcome three primary obstacles: polarization dependence, narrow bandwidth, and fabrication challenges. Here, we address these issues with the design of a three-dimensional, fully isotropic, broadband NRI medium that can be produced on a large scale. The simulated structure exhibits a NRI bandwidth of 24.1%, more than twice that achievable using a typical split-ring resonator/wire medium. A four-hundred-unit-cell slab measuring 15 cm x 15 cm x 6 cm is fabricated and used as a flat NRI lens. The lens produces a super-resolved focus independent of the type of source or its polarization.

引用

页码：3661 / 3669

页数：9

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