Characterization of dipolar current-based metamaterials showing a single resonance in the terahertz spectrum

TL;DR

This paper investigates dipolar current-based metamaterials with a single resonance in the terahertz range, demonstrating scalable design and fabrication of frequency-selective devices with high quality factors.

Contribution

It introduces a scalable design method for dipolar current metamaterials with a single terahertz resonance, fabricated via lithography, for use as frequency selectors.

Findings

Metamaterials exhibit a single resonance from 1 to 8 THz.

Resonance quality factor remains high when scaling the design.

Fabrication using lithographic processes is simple and inexpensive.

Abstract

We will report on the electromagnetic response due to induced dipolar currents in metamaterials of 2-dimensional array of metallic elements. Used as frequency selectors, the metamaterial transmittance presents a single resonance in the region from 1 to 8 THz that can be easily selected and scaled maintaining unaltered the quality factor by choosing the size and shape of the planar metallic element and exploiting the scalability properties of the Maxwell equations. Basing on these studies, we have designed and tested a series of simple and inexpensive frequency selective metamaterials fabricated by using lithographic processes.