Analysis and simulation of terahertz graphene-based plasmonic waveguide

We present a theoretical approach for a terahertz graphene-based plasmonic waveguide (TGPW) structure. TGPW is combination of two silicon micro-wires located in a SiO₂ surroundings on both sides of graphene layers where each one supports two independent propagating surface plasmon polariton waves on both surfaces. It also investigates properties of TGPW and how sub-terahertz frequency impact them. In this structure, we employed two graphene plates and a silver layer. The results show that the structure under study can confine light in the wavelength ranging from λ = 300 μm to λ = 3000 μm with a propagation length ranging from 0.5 to 8.2 μm. The highly compact configuration can be chiefly applicable in areas such as trapping optical force, transporting biomolecules and also in high-density integrated circuits.