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The Research On The Electromagnetic Properties And The Control Of Surface Plasmon Polaritons Based On The Metamaterial

Posted on:2015-03-10Degree:MasterType:Thesis
Country:ChinaCandidate:W R ZhangFull Text:PDF
GTID:2268330431451028Subject:Electronic and communication engineering
Abstract/Summary:PDF Full Text Request
Recently, the surface plasmon polaritons is used to overcome the diffraction limit of the traditional dielectric optical device. The conventional surface plasmon polaritons is an evanescent wave in the excited state which is confined to the metallic surface. It is the result of the interaction between the free electron and the photon. It travels along the interface of metal and dielectric, and works in the optical spectrum. In order to extend the application of the surface plasmon polaritons, the metamaterials and the surface plasmon polaritons are combined, and its electromagnetic properties are studied. Metamaterials are man-made composite with periodic or pseudo-periodic structures and fascinating electromagnetic properties. The graphene and the material with negative permeability were used in this paper.A point proposed in this paper was that the graphene and material with negative permeability in the ribbons structure could support the propagation of the surface plasmon polaritons. And then theoretical derivation, numerical calculation and simulation verification were carried out. By analyzing and calculating the conductivity, dispersion relation, wavelength and the field distribution of graphene, a conclusion that the nanoscale graphene is able to support the surface plasmon polaritons at the terahertz frequencies was got. The research on the material with negative permeability was divided into two parts. In first part, only a single interface is as a situation. That is, the material is thick enough for the waves on the top and bottom surface of the material without interference with each other. In this situation, the wavelength of the wave in the interface of material and dielectirc is millimeter-sized. First, the dispersion relation formula was deduced for obtaining equations of the wavelength, propagation distance and skin depth. Then those values were calculated, and verified the proposed viewpoint by comparing the simulation results with the values from Matlab. The second part is the situation that the material is thin enough. Because of the coupling effect between the waves on the top and bottom surface of the material, the analysis of multilayered medium was chosen. The thickness of material and the wavelength of the surface plasmon polaritons are both micron-sized. And the operating frequency is in the microwave band just as the first part. The similar theoretical derivation was carried on to get the intrinsic equation. The wavelength is also achieved by the Matlab, and the verification by the simulation is also made.The studies show that the graphene and the material with negative permeability indeed can provide a platform for the propagation of the surface plasmon polaritons. This paper offers the theoretic foundation for the comprehensive application of the surface plasmon polaritons in the fields of the device fabrication.
Keywords/Search Tags:Surface Plasmon Polaritons, Metamaterials, Graphene, Material with negativepermeability, Magnetic permeability
PDF Full Text Request
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