Effect of the Metallization on the Resonances of THz Fishnet Metamaterials

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SABAH C., Roskos H. G.

JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS, vol.7, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 7
  • Publication Date: 2012
  • Doi Number: 10.2971/jeos.2012.12005
  • Journal Name: JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Keywords: Metamaterials, Fishnet Metamaterials, Surface-Plasmon-Polaritons, Negative Permeability, Negative Permittivity, Negative Refractive Index, THz Wave, Multiple Resonances, NEGATIVE-INDEX, METALS
  • Middle East Technical University Northern Cyprus Campus Affiliated: No

Abstract

In this numerical study, the influence of the choice of metal (and hence of the conductivity) used for the fabrication of THz fishnet metamaterials is investigated. We explore an exemplary structure for which surface-plasmon-polaritons offer - assuming sufficiently good conductivity - pronounced extraordinary transmission and strong multiple magnetic resonances with negative permeability. We analyze the dependence of these signatures on the type of metallization. Studying five different metals, we find that the metallization is important for achieving the multiple resonances. A reduction of the conductivity can lead to a dramatic weakening and even a near-disappearance of magnetic resonances if they lose their diamagnetic character. [DOI: http://dx.doi.org/10.2971/jeos.2012.12005]