Modulating broadband terahertz in a Graphene assisted dielectric Metamaterial

In this article, we report a polarization-sensitive tunable metamaterial modulator, which staking of a dielectric slab of a complementary cylindrical shell, graphene nanoribbons, dielectric spacer and a metallic layer. Our design promises more than 95% absorption in the range of 1.2 THz to 1.7 THz for TM polarization. In contrast, we get negligible absorption for the TE polarization. We further investigate the tunable absorption in our proposed metamaterial configuration by changing the Fermi energy of graphene. The study could be significant to construct broadband polarization-sensitive devices in the THz regime.