Title :
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
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);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2012.2220957
