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

Philippe Tassin (Institutionen för teknisk fysik, Kondenserade materiens teori) ; Thomas Koschny ; Costas M. Soukoulis
Physica B: Condensed Matter (0921-4526). Vol. 407 (2012), 20, p. 4062-4065.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Effective medium, graphene, metamaterials, retrieval, silver, thin film



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Denna post skapades 2013-10-02. Senast ändrad 2015-03-05.
CPL Pubid: 184548

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kondenserade materiens teori (1900-2015)

Ämnesområden

Nanovetenskap och nanoteknik
Optisk fysik
Den kondenserade materiens fysik
Övrig elektroteknik, elektronik och fotonik

Chalmers infrastruktur