Single and multiband THz Metamaterial Polarizers

TL;DR

This paper presents the design, fabrication, and characterization of single and multiband terahertz metamaterial polarizers using cut-wire structures on Gallium Arsenide, demonstrating tunable resonance frequencies.

Contribution

It introduces a novel approach to creating multiband THz polarizers with precise resonance control via finite element design and electron beam lithography.

Findings

Successful fabrication of single and multiband THz polarizers

Resonance frequency tuning based on cut-wire length

Validation of the transmission line model for resonance prediction

Abstract

We report single and multiband linear polarizers for terahertz (THz) frequencies using cut-wire metamaterials (MM). The MMs are designed by finite element method, fabricated by electron beam lithography, and characterized by THz time-domain spectroscopy. The MM unit cells consist of single or multiple length cut-wire pads of gold on semi-insulating Gallium Arsenide for single or multiple band polarizers. The dependence of the resonance frequency of the single band polarizer on the length of the cut-wires is explained based a transmission line model.