Applicability of point-dipoles approximation to all-dielectric metamaterials

S. M. Kuznetsova, Andrei Andryieuski, Andrei Lavrinenko

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All-dielectric metamaterials consisting of high-dielectric inclusions in a low-dielectric matrix are considered as a low-loss alternative to resonant metal-based metamaterials. In this paper we investigate the applicability of the point electric and magnetic dipoles approximation to dielectric meta-atoms on the example of a dielectric ring metamaterial. Despite the large electrical size of high-dielectric meta-atoms, the dipole approximation allows for accurate prediction of the metamaterials properties for the rings with diameters up to approximate to 0.8 of the lattice constant. The results provide important guidelines for design and optimization of all-dielectric metamaterials.
Original languageEnglish
JournalPhysical Review B
Issue number3
Number of pages10
Publication statusPublished - 2015

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