Adaptable Terahertz absorber using circular shaped Graphene Metamaterial for LO Technology

Terahertz (THz) technology, which is one of the emerging sectors, has greater demand for high-performance devices. It has a wide range of applications in time domain spectroscopy, highly sensitive sensing, security monitoring, biological imaging, and high-speed communication. Therefore, one of the milestones of terahertz technology is an efficient shielding of THz radiation which absorbs it rather than radiating. Hence, designed an absorber that uses graphene as a metamaterial that has a resonant frequency at 3THz and an absorption bandwidth range from 1. 3THz$\sim$4.5THz. The Bandwidth, resonant frequency and absorption of the absorber can be varied by changing different geometric parameters of metamaterial and substrate which makes it a tunable absorber. And at frequencies 2THz and 4. 3THz, the absorber works effectively and has an absorption rate of nearly 100% which makes it applicable to various terahertz applications. It can be effectively used in LO (Low Observable) technology.