Design, theory, and measurement of a polarization insensitive absorber for terahertz imaging

TL;DR

This paper introduces a polarization-insensitive metamaterial absorber for terahertz imaging, providing a theoretical framework, design methodology, and experimental validation with high absorption efficiency.

Contribution

It presents a novel design approach for polarization-insensitive terahertz absorbers, including theoretical conditions and practical realization achieving 78% absorption.

Findings

Achieved 78% absorptivity at 1.145 THz

Derived geometrical-independent conditions for effective medium absorbers

Validated design through fabrication and measurement

Abstract

We present the theory, design, and realization of a polarization-insensitive metamaterial absorber for terahertz frequencies. We derive geometrical-independent conditions for effective medium absorbers in general, and for resonant metamaterials specically. Our fabricated design reaches and absorptivity of 78% at 1.145 Thz