Enhanced diffraction from a grating on the surface of a negative-index metamaterial

被引：35

作者：

Smith, DR ^{[1
]}

Rye, PM ^{[1
]}

Mock, JJ ^{[1
]}

Vier, DC ^{[1
]}

Starr, AF ^{[1
]}

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 13期

关键词：

D O I：

10.1103/PhysRevLett.93.137405

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show by numerical simulation as well as by measurements on negative-index metamaterial wedge samples, that the unavoidable stepping of the refraction interface-due to the finite unit-cell size inherent to metamaterials-can give rise to a well-defined diffracted beam in addition to the negatively refracted beam. The direction of the diffracted beam is consistent with elementary diffraction theory; however, the coupling to this higher order beam is much larger than would be the case for a positive index material. The results confirm recent theoretical predictions of enhanced diffraction for negative-index grating surfaces.

引用

页码：137405 / 1

页数：4

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