• 文献标题:   Effective material parameter retrieval for thin sheets: Theory and application to graphene, thin silver films, and single-layer metamaterials
  • 文献类型:   Article, Proceedings Paper
  • 作  者:   TASSIN P, KOSCHNY T, SOUKOULIS C
  • 作者关键词:   metamaterial, retrieval, effective medium, thin film, silver, graphene
  • 出版物名称:   PHYSICA BCONDENSED MATTER
  • ISSN:   0921-4526 EI 1873-2135
  • 通讯作者地址:   US DOE
  • 被引频次:   43
  • DOI:   10.1016/j.physb.2012.01.119
  • 出版年:   2012

▎ 摘  要

An important tool in the field of metamaterials is the extraction of effective material parameters from simulated or measured scattering parameters of a sample. Here we discuss a retrieval method for thin-film structures that can be approximated by a two-dimensional scattering sheet. We determine the effective sheet conductivity from the scattering parameters and we point out the importance of the magnetic sheet current to avoid an overdetermined inversion problem. Subsequently, we present two applications of the sheet retrieval method. First, we determine the effective sheet conductivity of thin silver films and we compare the resulting conductivities with the sheet conductivity of graphene. Second, we apply the method to a cut-wire metamaterial with an electric dipole resonance. The method is valid for thin-film structures such as two-dimensional metamaterials and frequency-selective surfaces and can be easily generalized for anisotropic or chiral media. (c) 2012 Elsevier B.V. All rights reserved.