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Applied Physics B

, Volume 84, Issue 1–2, pp 139–148 | Cite as

Evaluation of gold nanowire pairs as a potential negative index material

  • F. GarweEmail author
  • C. Rockstuhl
  • C. Etrich
  • U. Hübner
  • U. Bauerschäfer
  • F. Setzpfandt
  • M. Augustin
  • T. Pertsch
  • A. Tünnermann
  • F. Lederer
Article

Abstract

A metamaterial consisting of pairs of metallic nanowires, separated by a dielectric spacer, has been fabricated and spectrally characterized in the visible and near-infrared spectral domain. It is shown, that the structure exhibits both a plasmonic and a magnetic resonance depending on its geometry and orientation with respect to the illuminating wave field. In particular, we investigate the influence of the thickness of the spacer layer on the spectral position of the resonances and show that, for an appropriate adjustment, both resonances coincide. Measurements of the amplitude and the phase of the transmitted wave are presented. It is also shown that the material is highly anisotropic with respect to the angle of incidence, as the plasmonic resonance wavelength depends strongly on it whereas the magnetic resonance does not show this sensitivity. All experimental results are supported by numerical simulations.

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • F. Garwe
    • 1
    • 2
    Email author
  • C. Rockstuhl
    • 2
  • C. Etrich
    • 2
  • U. Hübner
    • 1
  • U. Bauerschäfer
    • 3
  • F. Setzpfandt
    • 2
  • M. Augustin
    • 2
  • T. Pertsch
    • 2
  • A. Tünnermann
    • 2
  • F. Lederer
    • 2
  1. 1.Institute for Physical High TechnologyJenaGermany
  2. 2.Friedrich-Schiller-Universität JenaJenaGermany
  3. 3.GmBUHalle/S.Germany

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