Proposal of an infrared electro-optic switch based on grapheme–silicone–graphene metamaterial with electrically dynamic tunability

The electrically dynamic tunability of a proposed metamaterial switch based on graphene–silicene–graphene heterogeneous structure is theoretically investigated in the terahertz range using the finite difference time domain (FDTD) method. The resonant frequency of the proposed switch can be controlled by the chemical potential of graphene and silicene sheets, independently. As a result, we can easily control the operating frequency of the fixed proposed structure in a desired wide range from 4 to 18 μm, as an electro-optic switch. The proposed switch surface area, insertion losses (IL), extinction ratio (ER) and quality factor (Q) are equal to 0.3 × 5 µm2, 0.15 dB, 30 dB and 40, respectively.