Efficient terahertz radiation absorption using a graphene and InSb pixel-based metasurface absorber: design and simulation

• DOI: 10.1364/josab.546983
• Publication Date: 2025-02-14T15:00:10Z
• Authors: Mohit Kumar Singh; Govindam Sharma; Kamisetty Likhita...; G. Lalitha; M. Likhith Krishn...; Subramaniam Rajas...

Metasurfaces offer a fascinating approach for THz absorption applications due to their exceptional ability to manipulate electromagnetic wave properties. Our study involved simulating metasurface containing pixels made of graphene and InSb for the absorption of terahertz waves. The metasurface consisted of an array of pixelated meta-atoms on a dielectric substrate supported by a perfect electric conductor. Simulations were conducted using the well-explored commercially available software CST Microwave Studio Suite. A metasurface comprising six graphene, two InSb, and one unpatched meta-atom achieved a remarkable absorptance of 0.99 across a broad spectral regime of 1.5 THz spanning between 2.20 and 3.70 THz.