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- Title
Near-field-induced tunability of surface plasmon polaritons in composite metallic nanostructures.
- Authors
Christ, A; Lévêque, G; Martin, O J F; Zentgraf, T; Kuhl, J; Bauer, C; Giessen, H; Tikhodeev, S G
- Abstract
We numerically study near-field-induced coupling effects in metal nanowire-based composite nanostructures. Our multi-layer system is composed of individual gold nanowires supporting localized particle plasmons at optical wavelengths, and a spatially separated homogeneous silver slab supporting delocalized surface plasmons. We show that the localized plasmon modes of the composite structure, forming so-called magnetic atoms, can be controlled over a large spectral range by changing the thickness of the nearby metal slab. The optical response of single-wire and array-based metallic structures are compared. Spectral shifts due to wire-mirror interaction as well as the coupling between localized and delocalized surface plasmon modes in a magnetic photonic crystal are demonstrated. The presented effects are important for the optimization of metal-based nanodevices and may lead to the realization of metamaterials with novel plasmonic functionalities.
- Publication
Journal of microscopy, 2008, Vol 229, Issue Pt 2, p344
- ISSN
1365-2818
- Publication type
Journal Article
- DOI
10.1111/j.1365-2818.2008.01911.x