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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
(a) Extension cross-section spectra for different inter-particle distance. Near electric field distribution for: (b) Multi-polar resonant structure; (c) Modified bow-tie particle; and (d) The core/shell particles at the resonant PMMA-Graphene plasma wavelength (572 nm).