石墨烯表面等离子体波的传输特性及相关器件的应用基础研究

发布时间：2018-05-28 10:36

本文选题：石墨烯纳米带 + 表面等离子体波　；参考：《东南大学》2015年硕士论文

【摘要】：石墨烯(Graphene)是由单层碳原子紧密堆积成并呈现出蜂窝状晶体结构的二维材料。作为新兴的二维晶体材料,它具有非同寻常的导电性能、极高的电子迁移率、极低的电阻率、极好的透光率和超高的机械强度。与传统材料金属上的表面等离子体波相比,石墨烯所支持的表面等离子体波具有以下几个明显的优势：其一,具有很强的束缚性,即突破衍射极限的能力更强；其二,具有可调性,可以通过外加电压、化学掺杂、电场、磁场等手段来实现对石墨烯表面等离子体波特性的调控；其三,具有柔性,石墨烯表面等离子体波可以实现一些柔性器件的设计。本文围绕石墨烯表面等离子体波传输特性及其相关器件的设计进行深入研究,为进一步研究石墨烯的应用奠定基础。本论文的主要研究内容安排如下：(1)石墨烯及其表面等离子体波的简介以及对目前石墨烯表面等离子体波的研究进展的综述。(2)研究石墨烯的电磁特性——复表面电导率以及分析了其在不同条件下的化简形式；对石墨烯进行准确电磁建模并结合麦克斯韦方程组推导出相关的等效介电常数；在此基础上,分析并给出石墨烯表面等离子体波的特征电参数。(3)对石墨烯纳米带的模式进行分析,分析石墨烯纳米带宽度变化对偶边缘模式、奇边缘模式、波导模式的传输特性的影响；接下来,就其中偶边缘模式的传输特性进行详细的分析,研究石墨烯的化学势、石墨烯纳米带宽度对偶边缘模式传输特性的调控。(4)基于石墨烯纳米带偶边缘模式设计一款立体等离子体波导谐振器,研究并分析几何尺寸和化学势对谐振器的调控；最后,同样基于石墨烯纳米带的偶边缘模式,通过理论设计与数值实验实现基本逻辑门的设计。
[Abstract]:Graphene (Graphene) is a two-dimensional material composed of single-layer carbon atoms and honeycomb crystal structure. As a new two-dimensional crystal material, it has extraordinary conductivity, high electron mobility, very low resistivity, excellent transmittance and high mechanical strength. Compared with the surface plasma wave on the metal of traditional materials, the surface plasma wave supported by graphene has the following obvious advantages: first, it has strong binding ability, that is, the ability to break through the diffraction limit is stronger; second, the surface plasma wave supported by graphene has the following obvious advantages: first, the ability to break through the diffraction limit is stronger; It can regulate the surface plasma wave characteristics of graphene by means of applied voltage, chemical doping, electric field, magnetic field and so on. Some flexible devices can be designed by surface plasma wave of graphene. In this paper, the surface plasma wave propagation characteristics of graphene and the design of related devices are studied in depth, which lays a foundation for further research on the application of graphene. The main research contents of this thesis are as follows: (1) introduction of graphene and its surface plasma waves and a review of recent progress in the research of graphene surface plasma waves. Conductivity and its simplified form under different conditions are analyzed. On the basis of accurate electromagnetic modeling of graphene and Maxwell's equations, the equivalent dielectric constant is derived. The characteristic electric parameters of graphene surface plasma wave are analyzed and the modes of graphene nanobelts are analyzed. The effects of the width variation of graphene nanobelts on the propagation characteristics of dual edge mode odd-edge mode and waveguide mode are analyzed. Then, the transport characteristics of the even edge mode are analyzed in detail, and the chemical potential of graphene is studied. Based on graphene nanobandle pair edge mode, a three-dimensional plasma waveguide resonator is designed to study and analyze the geometric size and chemical potential of the resonator. Based on the even edge model of graphene nanoribbons, the basic logic gate is designed by theoretical design and numerical experiment.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ127.11;TN629.1

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