光学学报, 2018, 38 (2): 0223002, 网络出版: 2018-08-30
涂覆石墨烯的并行电介质纳米线中的模式分析 下载: 778次
Analysis of Modes in Graphene-Coated Parallel Dielectric Nanowires
摘要
采用多极方法对涂覆石墨烯的并行电介质纳米线中的模式特性进行了解析分析,详细研究了工作频率、电介质纳米线的几何结构参数和石墨烯的费米能对模式的有效折射率和传播长度的影响。结果表明,通过改变工作频率和石墨烯的费米能可以便捷地调节模式特性。此外,纳米线的半径或间距小于50 nm时,对模式特性有调节作用;然而,当这两个参数继续增大时,它们对模式特性的影响逐渐减小。对比显示多极方法的解析结果与有限元法的数值结果非常吻合。
Abstract
Mode properties of parallel dielectric nanowires coated with graphene are analyzed by using the multipole method. The effects of the operating frequency, the geometrical parameters of the dielectric nanowires, and the Fermi energy of the graphene on the effective refractive index and the propagation length are investigated in detail. The results show that mode properties can be easily adjusted by changing the operating frequency and the Fermi energy of graphene. In addition, the radius or the spacing can be used to adjust mode properties within the range of 50 nm. However, the effects of the two parameters decrease gradually when their values continue to increase. The comparison shows that the analytical results of the multipole method are in good agreement with the numerical results of the finite element method.
彭艳玲, 薛文瑞, 卫壮志, 李昌勇. 涂覆石墨烯的并行电介质纳米线中的模式分析[J]. 光学学报, 2018, 38(2): 0223002. Yanling Peng, Wenrui Xue, Zhuangzhi Wei, Changyong Li. Analysis of Modes in Graphene-Coated Parallel Dielectric Nanowires[J]. Acta Optica Sinica, 2018, 38(2): 0223002.