特异电磁材料和等离子体在控制电磁波的传播和对光场的局域方面，具备广泛的研究和应用，尤其是在太赫兹和光学波段。然而在大多数电磁结构中使用到了金属材料，同时利用了金属结构的共振特性，在高频波段对电磁波的耗散损耗比较严重，也不利于宽频响应的实现。工作在太赫兹波段，同时可以被外置偏压轻松调控的掺杂石墨烯材料，被引入到了特异电磁材料和等离子体器件中来。本项目拟理论设计基于石墨烯材料的等离子体波导、杂化等离子体波导、石墨烯特异电磁材料及石墨烯等离子体器件，并研究它们的电磁散射特性。主要的研究内容包括：(1) 研究石墨烯等离子体波导之间的耦合作用，以及耦合作用产生的场增强效应和等离子体波导间的横向光学力；(2) 理论设计并研究石墨烯杂化等离子体波导，以获得极小的模式面积和较大的传播长度；(3) 理论设计基于石墨烯材料的特异电磁材料及等离子体器件，并研究其电磁散射特性。

Metamaterials and plasmonics, in order to control the propagation of electromagnetic waves and confine the optical fields, have attracted lots of researchers and emerged a number of optical devices with novel electromagnetic properties, in particular at terahertz and optical frequencies. Unfortunately, significant dissipative loss must be considered for high working frequencies, because the noble metals are used for the designs of most man-made metamaterials or plasmonic systems. And these optical devices, usually based on the resonant metallic structures, are difficult to be obtained with wide frequency response. Other material systems are under consideration to reduce the dissipative loss. Graphene, which works at terahertz and can be tunable by bias voltage, is introduced into the metamaterials and plasmonic systems. The present project is devoted to the theoretical designs of graphene based plasmonic waveguides, hybrid plasmonic waveguides, graphene metamaterials and graphene plasmonic devices, and to the theoretical studies for the electromagnetic scattering properties of them. Our researches are going to concern (i) investigating the coupling of evanescent waves between two graphene plasmonic waveguides, the field enhancement, and the transverse optical force; (ii) theoretical designs and studies of graphene hybrid plasmonic waveguides, in order to obtain extremely small mode area and long propagation of surface plasmon waves; (iii) theoretical designs of graphene based metamaterials and plasmonic devices, and researches of their electromagnetic scattering properties.