• 文献标题:   Fast convergent Fourier modal method for the analysis of periodic arrays of graphene ribbons
  • 文献类型:   Article
  • 作  者:   KHAVASI A
  • 作者关键词:  
  • 出版物名称:   OPTICS LETTERS
  • ISSN:   0146-9592 EI 1539-4794
  • 通讯作者地址:   Sharif Univ Technol
  • 被引频次:   17
  • DOI:   10.1364/OL.38.003009
  • 出版年:   2013

▎ 摘  要

Li's Fourier factorization rules [J. Opt. Soc. Am. A 13, 1870 (1996)] should be applied to achieve a fast convergence rate in the analysis of diffraction gratings with the Fourier modal method. I show, however, that Li's inverse rule cannot be applied for periodic patterns of graphene when the conventional boundary condition is used. I derive an approximate boundary condition in which a nonzero but sufficiently small height is assumed for the boundary. The proposed boundary condition enables us to apply the inverse rule, leading to a significantly improved convergence rate. A periodic array of graphene ribbons is in fact a special type of finite-conductivity strip grating, and thus the proposed approach is also applicable to these kinds of structures. (C) 2013 Optical Society of America