Effective material parameter retrieval for thin sheets: Theory and application to graphene, thin silver films, and single-layer metamaterials
Artikel i vetenskaplig tidskrift, 2012

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.

metamaterials

silver

retrieval

graphene

thin film

Effective medium

Författare

Philippe Tassin

Chalmers, Teknisk fysik, Kondenserade materiens teori

Thomas Koschny

Costas M. Soukoulis

Physica B: Condensed Matter

0921-4526 (ISSN)

Vol. 407 20 4062-4065

Styrkeområden

Nanovetenskap och nanoteknik

Ämneskategorier

Atom- och molekylfysik och optik

Annan elektroteknik och elektronik

Den kondenserade materiens fysik

DOI

10.1016/j.physb.2012.01.119

Mer information

Skapat

2017-10-06