Nano- and Micro- Engineering for Design of Smart Magnetic Metamaterials as Microwave-Absorbing

Abstract

Electromagnetic (EM) wave-absorbing materials are of paramount importance in communication applications, radar stealth technology, and electromagnetic interference shielding. The design and analysis of a Smart Magnetic Metamaterial based on Split Ring Resonators (SRR) are explored in this study to achieve broadband and high absorption of Terahertz (THz) waves. Unlike conventional materials, metamaterials offer the ability to engineer their electromagnetic properties, specifically the complex permittivity and complex permeability, to achieve optimal Impedance Matching and energy dissipation. The unit cell of the absorber was designed and analyzed, and the surface current distribution was examined to determine the resonance mechanism. Simulation results indicated that high absorption is achieved by the proposed absorber in a broad band centered around 1.5‒1.6 THz. The effect of geometric variations, specifically the gap width (d), on the absorption characteristics and Group Delay was also analyzed. The potential of this design for developing ultra-broadband and efficient absorbing devices in the THz range is confirmed by the results.