Cut-wire-pair structures as two-dimensional magnetic metamaterials

TL;DR

This paper introduces a new two-dimensional magnetic metamaterial design using cut-wire pairs, demonstrating microwave frequency operation with promising properties for optical scaling and unique magnetic stop-band features.

Contribution

The study presents the first experimental and numerical analysis of cut-wire pair based magnetic metamaterials suitable for optical frequency scaling.

Findings

Successful fabrication of microwave frequency cut-wire metamaterials

Good agreement between experiments and simulations

Presence of a magnetic stop-band due to nearest-neighbor coupling

Abstract

We study numerically and experimentally magnetic metamaterials based on cut-wire pairs instead of split-ring resonators. The cut-wire pair planar structure is extended in order to create a truly two-dimensional metamaterial suitable for scaling to optical frequencies. We fabricate the cut-wire metamaterial operating at microwave frequencies with lattice spacing around 10% of the free-space wavelength, and find good agreement with direct numerical simulations. Unlike the structures based on split-ring resonators, the nearest-neighbor coupling in cut-wire pairs can result in a magnetic stop-band with propagation in the transverse direction.