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The influence of wire shape on surface plasmon mode distribution

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Abstract

The influence of the nanowire shape on the excitation of surface plasmon polaritons at metallic nanowire arrays is studied numerically. For a system of silver nanowires housed on a polymer substrate, nanowires with rectangular and elliptical cross sections are compared. It was found that in the case of rectangular nanowires the excitation efficiency is higher for surface plasmons at the polymer–metal interface than for surface plasmons at the air–metal interface. Conversely, in the case of elliptical nanowires the air–metal plasmon modes are stronger. Further, it is noted that the nanowire shape directly influences the position of the surface plasmon resonance.

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Authors and Affiliations

  1. Institut für Physik and Institut für Mikro- und Nanotechnologien, Technische Universität Ilmenau, 98693, Ilmenau, Germany

    P. Scholz, S. Schwieger & E. Runge

  2. School of Physics, University College Dublin (UCD), Science Center North, Dublin, 4, Ireland

    B. Ashall & D. Zerulla

Authors
  1. P. Scholz
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  2. S. Schwieger
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  3. B. Ashall
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  4. D. Zerulla
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  5. E. Runge
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Correspondence to E. Runge.

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Scholz, P., Schwieger, S., Ashall, B. et al. The influence of wire shape on surface plasmon mode distribution. Appl. Phys. B 93, 111–115 (2008). https://doi.org/10.1007/s00340-008-3208-y

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  • DOI: https://doi.org/10.1007/s00340-008-3208-y

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