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Applied Physics Letters / Volume 97 / Issue 8 / STRUCTURAL, MECHANICAL, THERMODYNAMIC, AND OPTICAL PROPERTIES OF CONDENSED MATTER

Appl. Phys. Lett. 97, 081901 (2010); http://dx.doi.org/10.1063/1.3457448 (3 pages)

Chiral metamaterials with negative refractive index based on four “U” split ring resonators

Zhaofeng Li1, Rongkuo Zhao2,3, Thomas Koschny2,4, Maria Kafesaki4, Kamil Boratay Alici1, Evrim Colak1, Humeyra Caglayan1, Ekmel Ozbay1,5, and C. M. Soukoulis2,4

1Nanotechnology Research Center and Department of Physics, Bilkent University, Bilkent, 06800 Ankara, Turkey
2Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
3Applied Optics Beijing Area Major Laboratory, Department of Physics, Beijing Normal University, Beijing 100875, China
4Institute of Electronic Structure and Laser, FORTH, and Department of Materials Science and Technology, University of Crete, 71110 Heraklion, Crete, Greece
5Department of Electrical and Electronics Engineering, Bilkent University, Bilkent, 06800 Ankara, Turkey

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(Received 5 February 2010; accepted 4 June 2010; published online 23 August 2010)

A uniaxial chiral metamaterial is constructed by double-layered four “U” split ring resonators mutually twisted by 90°. It shows a giant optical activity and circular dichroism. The retrieval results reveal that a negative refractive index is realized for circularly polarized waves due to the large chirality. The experimental results are in good agreement with the numerical results.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

chirality, circular dichroism, metamaterials, refractive index

PACS

  • 78.67.Pt

    Multilayers; superlattices; photonic structures; metamaterials

  • 78.20.Fm

    Birefringence

  • 78.20.Ek

    Optical activity

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3457448

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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