Negative Refractive Index at the Third-Order Resonance of Flower-Shaped Metamaterial

Author

Pham Van Tuong ; Park, J.W. ; Lam, V.D. ; Jang, W.H. ; Choi, E.H. ; Nikitov, S.A. ; Lee, YoungPak

Author_Institution

Dept. of Phys., Hanyang Univ., Seoul, South Korea

Volume

30

Issue

22

fYear

2012

Firstpage

3451

Lastpage

3455

Abstract

We numerically and experimentally investigated the negative refractive index effect in a single subwavelength magnetic “meta-atom,” a flower-shaped metamaterial (MM) structure. In our effort to understand the electromagnetic properties of flower-shaped structure, the third resonance has been considered for a rather high frequency in the gigahertz range of electromagnetic wave. It is found that the negative refractive index is a result of the tail of electric gap and the magnetic resonance at the third-order resonance. The effect is switched OFF by adjusting the density of flowers. In addition, the negative refractive index behavior is accompanied by polarization insensitivity resulting from its geometry. Finally, the electromagnetic and the loss properties of the MM were clarified at the third-order gap.

Keywords

electromagnetic wave polarisation; magnetic resonance; metamaterials; refractive index; electric gap; electromagnetic properties; electromagnetic wave; flower-shaped metamaterial structure; gigahertz range; loss properties; magnetic resonance; negative refractive index behavior; polarization insensitivity; single subwavelength magnetic metaatom; third-order gap; third-order resonance; Frequency selective surfaces; Magnetic materials; Magnetic resonance; Metamaterials; Optical resonators; Refractive index; Magnetic resonance; metamaterials; multiplasmon; negative refractive index (NRI);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2220957

Filename

6316041