Tunable composite nanoparticle for plasmonics |
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Authors: | Lévêque Gaëtan Martin Olivier J F |
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Institution: | Nanaophotonics and Metrology Laboratory, Ecole Polytechique Féderale de Lausanne, Switzerland. gaetan.leveque@epfl.ch |
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Abstract: | We present a numerical study of the tunability properties of a plasmonic subwavelength particle deposited on a metallic slab. The particle is composed of a metallic part, supporting a localized plasmon mode, separated from the slab by a dielectric spacer. It is shown that the position of the resonance wavelength can be modified over a large spectral range by changing either the spacer thickness by a few tens of nanometers or its susceptibility within the range of usual dielectrics. A linear relation is observed between the resonance wavelength and the spacer permittivity. |
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