Abstract:
—In this paper, we design and simulate the graphene
based metamaterial absorber (MMA) based on dual-ring
structure at terahertz frequencies using HFSS software. The
obtained results are validated by employing an equivalent circuit
model. The unit cell of proposed MMA consists of dual metallic
rings coupled with graphene, and are insulated by SiO2 from the
ground metallic plane. The dual ring MMA structure
demonstrates perfect absorption at 1.6 and 2.89 THz for a Fermi
energy of 0.2 eV. A complementary MMA has also been
demonstrated with one more absorption peak for potential
applications in terahertz imaging, detection, and sensing.
