Metamaterial-Based Broadband Absorber Design
Camilla C. Moro Carmo, Rose Mary de Souza Batalha, Lucas Douglas Ribeiro, Úrsula C. Resende
Abstract
In this article, a novel metamaterial absorber is designed within the visible light regime. The structure comprises nickel (Ni) resonator disks placed over a silicon dioxide substrate in a uniform pattern, with the operating frequency between 350 and 800 THz. Additionally, the infrared (IR) and ultra-violet regions are also investigated. Numerical studies are carried out using a computational electromagnetic solver. The obtained results show nearly perfect absorption, with an average absorption of 99% between 100 and 1000 THz. The physical dimensions are optimized allowing for maximum absorption results. Due to the ultra-wideband characteristic in the visible regime, the proposed design can be used as a highly efficient absorber in several applications, including solar energy harvesting, IR detector, cloaking, sensing, and EMC projects.