Abstract
We investigate the resonances in the scattering and absorption of TE-polarized light by a solid circular silver wire and a silver tube larger than the wavelength radius and nanoscale thickness using the analytical solution and experimental data for the silver complex permittivity. We find that the resonances are well observed both in the visible and infra-red ranges if the scatterer radius is smaller than a certain value. They can be explained as the resonances on the standing surface-plasmon waves running along a curved metal-air interface or a metal layer, respectively. Still, each of them corresponds to one of the multipole localized surface plasmon modes of the circular wire or tube. This bridges the gap between localized and delocalized plasmons, which are complementary descriptions of the same physical effect intrinsic for metals in the visible range.
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