项目名称: 电磁波在类石墨烯光子晶体中的传播特性研究
项目编号: No.11304258
项目类型: 青年科学基金项目
立项/批准年度: 2014
项目学科: 数理科学和化学
项目作者: 徐金英
作者单位: 福州大学
项目金额: 25万元
中文摘要: 电磁波和电子在超材料中传播时展现出许多不同于一般固体材料的新奇物理特性,使得这些材料及其物理特性的研究受到了人们的关注。最近的研究表明,正方格子光子晶体中也存在线性色散关系,即存在狄拉克点。对于带状类石墨烯结构的光子晶体,不同的边界类型其边缘态的特征也不一样,且两种不同参数的类石墨烯光子晶体的界面会出现界面态。本项目将利用层间Korringa-Kohn-Rostoker-Ohtako方法,研究电磁波在类石墨烯结构光子晶体中传播的相关问题。首先研究运动电子束产生的电磁波与零折射率类石墨烯光子晶体之间的相互作用。利用这种相互作用产生的电子能量损失谱来研究这种材料在狄拉克点附近的表面态特征,以及在零折射的频率处的能量损失特征。利用电子能量损失来研究带状类石墨烯光子晶体的边缘态,以及两种类石墨烯光子晶体的界面态特征。
中文关键词: 左手材料;石墨烯;电磁辐射压力;手性分子;等离子体
英文摘要: It exhibits novel physical characteristics when electromagnetic wave and electrons propagate in the metamaterials which are different from the common solid materials. Therefore the study of these materials and their physical properties has attracted people's attention. Recent studies have shown that Linear dispersion and Dirac cones can be obtained at the point (k=0) using a simple two-dimensional (2D) photonic crystal consisting of a square lattice of dielectric rods. In the graphene-like photonic crystal structure, the edge states are difference for different boundary types. Therefore, there will appear interface state at the interface between two graphene-like photonic crystal with different parameters. In this work, we will use the layer Korringa-Kohn-Rostoker-Ohtako method, study on problems related to the electromagnetic wave propagation in the graphene-like photonic crystals. First, we will study the interaction of photonic crystal with Dirac cones and electron beams and test the electron energy loss in the zero-refractive-index frequency. We will use the spectra of energy loss to study the edge states in honeycomb photonic crystals and the interface states formed in a heterostructure composed of two semi-infinite photonic crystals with different filling fractions.
英文关键词: Left-handed materials; Graphene;Electromagnetic force;Chiral molecules;Plasmonic particles