Study Of The Application Of Graphene Surface Plasmons Transmission Properties And Related Devices

Graphene is a 2D material, atomically thick single layer of carbon atoms arranged in a honeycomb lattice. As a new two-dimensional crystalline material, it exhibits many unique properties including unusual conductivity, high electron mobility, low resistivity, excellent light transmittance and ultra-high mechanical strength. Compared to conventional noble metal, graphene surface plasmons has following obvious advantages:first, strong confinement--stronger beyond the diffraction limit; second, tunability--graphene surface plasmons can be tuned by applying a voltage, electric field, magnetic field, chemical doping and so on; third, flexibility--flexibility devices can be realized using graphene surface plasmons. In this paper, we will study the transmission properties of graphene surface plasmons and the application of related devices, our work will pave way for the application of graphene.The main contents of this dissertation are as follows:(1) Make a introduction for graphene and surface plasmons and review the progress in the research of graphene surface plasmons.(2) Study the electromagnetic characteristics of graphene:surface conductivity and analysis its reduced form under different conditions; accurate electromagnetic modeling of graphene and derive the effective permittivity based on Maxwell equation; on this basis, analysis the characteristics of electric parameters of graphene surface plasmons.(3) Study modes of graphene nanoribbons and analysis the influence of the width of graphene nanoribbons on transmission properties of edge and waveguide mode; study and analysis the influence of chemical potential and the width on the transmission of even edge mode.(4) Design a tunable plasmonic resonator using graphene nanoribbons, study and analysis the tunability by changing the structure size and chemical potential; design and simulate logic gate based on even edge mode in graphene nanoribbons.