We obtain the analytical dispersion of 1D plasmonic modes on a ring from the exact solution of the hydrodynamical model with soft Coulomb potential. We compare our results with the exact plasmon dispersion in straight 1D systems and find a set of formal correspondences between the two. In light of our results, we discuss recent experiments (Schmidt et al 2014 Nat. Commun. 5 3604) where ring-confined modes in nanodiscs are found to almost coincide with plasmonic excitations in 1D metallic nanostructures. We trace the similarity to the scaling properties of the plasmonic dispersion.
Exact long-wavelength plasmon dispersion on a ring with soft Coulomb interactions / Grasselli, Federico; Bertoni, Andrea; Goldoni, Guido. - In: PHYSICA SCRIPTA. - ISSN 0031-8949. - 92:9(2017), pp. 1-5. [10.1088/1402-4896/aa81ef]
Exact long-wavelength plasmon dispersion on a ring with soft Coulomb interactions
GRASSELLI, FEDERICO;BERTONI, Andrea;GOLDONI, Guido
2017
Abstract
We obtain the analytical dispersion of 1D plasmonic modes on a ring from the exact solution of the hydrodynamical model with soft Coulomb potential. We compare our results with the exact plasmon dispersion in straight 1D systems and find a set of formal correspondences between the two. In light of our results, we discuss recent experiments (Schmidt et al 2014 Nat. Commun. 5 3604) where ring-confined modes in nanodiscs are found to almost coincide with plasmonic excitations in 1D metallic nanostructures. We trace the similarity to the scaling properties of the plasmonic dispersion.File | Dimensione | Formato | |
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Superlatt Microstr 108 73-87 (2017).pdf
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