Negative Refraction and Planar Focusing Based on Parity-Time Symmetric Metasurfaces

被引：245

作者：

Fleury, Romain ^{[1
]}

Sounas, Dimitrios L. ^{[1
]}

Alu, Andrea ^{[1
]}

机构：

[1] Univ Texas Austin, Dept Elect & Comp Engn, Austin, TX 78712 USA

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 113卷 / 02期

关键词：

Light refraction - Metamaterials;

D O I：

10.1103/PhysRevLett.113.023903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce a new mechanism to realize negative refraction and planar focusing using a pair of parity-time symmetric metasurfaces. In contrast to existing solutions that achieve these effects with negative-index metamaterials or phase conjugating surfaces, the proposed parity-time symmetric lens enables loss-free, all-angle negative refraction and planar focusing in free space, without relying on bulk metamaterials or nonlinear effects. This concept may represent a pivotal step towards loss-free negative refraction and highly efficient planar focusing by exploiting the largely uncharted scattering properties of parity-time symmetric systems.

引用

页数：5

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