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Toroidal eigenmodes in all-dielectric metamolecules

TitleToroidal eigenmodes in all-dielectric metamolecules
Publication TypeJournal Article
Year of Publication2016
AuthorsTasolamprou, AC, Tsilipakos, O, Kafesaki, M, Soukoulis, CM, Economou, EN
JournalPhysical Review B
Date Published11
Type of ArticleArticle
ISBN Number2469-9950
Accession NumberWOS:000388820200019
Keywordsanapole moments, dipole, field, generation, metamaterial, nanoparticles, parity nonconservation, physics, ring, state

d to the leaky nature of the constituent modes. Importantly, we observe that ensembles of an odd number of rods produce larger frequency separation between the toroidal mode and its neighbor than the ones with an even number of rods. This increased spectral isolation, along with the low quality factor exhibited by the toroidal mode, favors the coupling of the commonly silent toroidal dipole to the outside world, rendering the proposed structure a prime candidate for controlling the observation of toroidal excitations and their interaction with the usually present electric dipole.

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Alternate JournalPhys. Rev. B