A Novel Structure for Double Negative NIMs towards UV Spectrum with High FOM

TL;DR

This paper introduces a new ring structure for double negative metamaterials with high FOM at visible wavelengths, and extends the design towards UV spectrum using disk and nanowire structures.

Contribution

It presents a novel ring-based design for low-loss double negative NIMs with high FOM, and explores UV spectrum extension through alternative structures.

Findings

Achieved high FOM (~11) at 583 nm wavelength.

Demonstrated physical explanation via equivalent circuit model.

Extended design concepts towards UV spectrum.

Abstract

A novel ring structure is proposed for double negative NIMs at visible light spectrum with high FOM (e.g. about 11 at a wavelength of 583 nm) and low loss. Besides the effective medium theory, an equivalent circuit model is also given to explain physically why our novel structure can give double negative behavior with low loss. Adapted from the original ring structure, two other types of structures, namely, disk and nanowire structures, are also given to further push double negative NIMs toward ultraviolet (UV) spectrum.