Metamaterials: Optical Activity without Chirality

被引：524

作者：

Plum, E. ^{[1
]}

Liu, X. -X. ^{[1
,2
]}

Fedotov, V. A. ^{[1
]}

Chen, Y. ^{[3
]}

Tsai, D. P. ^{[2
]}

Zheludev, N. I. ^{[1
]}

机构：

[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

[2] Natl Taiwan Univ, Dept Phys, Taipei 10617, Taiwan

[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 11期

基金：

英国工程与自然科学研究理事会;

关键词：

NEGATIVE-INDEX; REFRACTION; DESIGN; SLAB;

D O I：

10.1103/PhysRevLett.102.113902

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report that the classical phenomenon of optical activity, which is traditionally associated with chirality (helicity) of organic molecules, proteins, and inorganic structures, can be observed in artificial planar media which exhibit neither 3D nor 2D chirality. We observe the effect in the microwave and optical parts of the spectrum at oblique incidence to regular arrays of nonchiral subwavelength metamolecules in the form of strong circular dichroism and birefringence indistinguishable from those of chiral three-dimensional media.

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