Abstract

Since realization of negative refractive index (NRI) metamaterials in 2001, which is about 20 years after its introduction as a pure academic concept in 1968, there has been much curiosity and enthusiasm for this field of study. Despite numerous potential applications, different loss mechanisms inherent to such materials have severely restricted their widespread usage. Based on this, NRI metamaterials with low losses are extensively studied in the literature. In this paper, we present a design to realize NRI at microwave frequencies which, to some degree, overcomes the limitations imposed by high intrinsic losses pertinent to such category of materials via bestowing a figure of merit (FOM) as high as 139.3. The layout includes two opposing parts, each containing a square slab in the middle of two crossing wires. The theoretical discussions unveiling the physics behind the NRI behavior, as well as effects of geometrical parameters, temperature, and the use of different metals on the FOM, are extensively discussed.

© 2022 Optica Publishing Group

Low-loss dual-band double-negative chirped metamaterial

Tun Cao, Chenwei Wei, and Martin J. Cryan
J. Opt. Soc. Am. B 32(1) 108-113 (2015)

Volumetric layered transmission-line metamaterial exhibiting a negative refractive index

Ashwin K. Iyer and George V. Eleftheriades
J. Opt. Soc. Am. B 23(3) 553-570 (2006)

Composite chiral metamaterials with negative refractive index and high values of the figure of merit

Zhaofeng Li, Kamil Boratay Alici, Humeyra Caglayan, Maria Kafesaki, Costas M. Soukoulis, and Ekmel Ozbay
Opt. Express 20(6) 6146-6156 (2012)

Negative refractive indices of a confined discrete fishnet metamaterial at visible wavelengths

Changchun Yan, Yiping Cui, Qiong Wang, and Shichuang Zhuo
J. Opt. Soc. Am. B 25(11) 1815-1819 (2008)

Dual-band, double-negative, polarization-independent metamaterial for the visible spectrum

Muhammad I. Aslam and Durdu Ö. Güney
J. Opt. Soc. Am. B 29(10) 2839-2847 (2012)