16 September 2016 Accessing high-order resonances in plasmonic nanostructures
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The optical excitation of high-order plasmonic resonant modes in nanostructures is important for the enhancement of light-matter interactions at the nanoscale. Due to the fast spatial variation of the electromagnetic field distribution associated with high-order modes, their excitation by conventional optical methods is extremely challenging. Here we describe a novel nonlinear scheme devised to access high-order plasmonic resonances. The proposed method is based on the temporal modulation of the permittivity of the medium surrounding a plasmonic nanoparticle. Analytical results are presented for the case of spherical nanoparticle demonstrating the effectiveness of the proposed method.
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Alessandro Salandrino, Alessandro Salandrino, Eli D. Symm, Eli D. Symm, "Accessing high-order resonances in plasmonic nanostructures", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99182B (16 September 2016); doi: 10.1117/12.2237076; https://doi.org/10.1117/12.2237076

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