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, cilt.7, 2012 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 7
  • Basım Tarihi: 2012
  • Doi Numarası: 10.2971/jeos.2012.12005
  • Dergi Adı: JOURNAL OF THE EUROPEAN OPTICAL SOCIETY-RAPID PUBLICATIONS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Metamaterials, Fishnet Metamaterials, Surface-Plasmon-Polaritons, Negative Permeability, Negative Permittivity, Negative Refractive Index, THz Wave, Multiple Resonances, NEGATIVE-INDEX, METALS
  • Orta Doğu Teknik Üniversitesi Kuzey Kıbrıs Kampüsü Adresli: Hayır

Özet

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]