Dual-wavelength active and tunable modulation at telecommunication wavelengths using graphene-metal hybrid metamaterial based on plasmon induced transparency

چکیده مقاله

Classic optical systems with a similar response to electromagnetically induced transparency (EIT) have received considerable attention. Plasmonically induced transparency (PIT) response is usually achieved by near-field coupling between resonators' bright and dark modes. Most PIT structures are based on metamaterials and have a constant near-infrared spectral response; manipulating the PIT spectral response without changing the geometric structure and modifying the substrate or electrical biasing is impossible. A graphene-metal metamaterial structure is proposed to create an active tunable near-IR transparency window. In the proposed two-layer structure, the metal bars act as bright resonators in the upper layer. In the lower layer, the metal nanoribbons act as dark resonators and two sets of bilayer graphene are placed separately below the bright resonators and above the dark resonators.