Broadband Mid‐Infrared Absorber Based on Dirac Semimetal Metamaterials
In this paper, a broadband terahertz absorber based on the Dirac‐semimetal AlCuFe is proposed. A classic metal–dielectric–metal (MIM) sandwich structure is adopted, consisting of a periodic AlCuFe pattern on the top, a silica dielectric spacer in the middle, and a gold reflective film at the bottom. When the Fermi leve...