Experimental demonstration of terahertz metamaterial absorbers with a broad and flat high absorption band

TL;DR

This paper demonstrates the design, simulation, and experimental validation of terahertz metamaterial absorbers that achieve broad, flat high absorption bands for different polarizations and wide angles, promising for THz applications.

Contribution

It introduces a novel metamaterial absorber design with dual resonators that produce a broad, flat absorption spectrum, validated through experiments and simulations.

Findings

Experimental results match simulations closely

Achieves high absorption over a broad bandwidth

Effective for both TE and TM polarizations

Abstract

We present the design, numerical simulations and experimental measurements of THz metamaterial absorbers with a broad and flat absorption top both for transverse electric and transverse magnetic polarizations over a wide incidence angle range. The metamaterial absorber unit cell consists of two sets of structures resonating at different but close frequencies. The overall absorption spectrum is the superposition of individual components and becomes flat at the top over a significant bandwidth. The experimental results are in excellent agreement with numerical simulations.