Tailoring effective media by Mie resonances of radially-anisotropic cylinders

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2015
Major/Subject
Mcode
Degree programme
Language
en
Pages
509-526
Series
Photonics, Volume 2, issue 2
Abstract
This paper studies constructing advanced effective materials using arrays of circular radially-anisotropic (RA) cylinders. Homogenization of such cylinders is considered in an electrodynamic case based on Mie scattering theory. The homogenization procedure consists of two steps. First, we present an effectively isotropic model for individual cylinders, and second, we discuss the modeling of a lattice of RA cylinders. Radial anisotropy brings us extra parameters, which makes it possible to adjust the desired effective response for a fixed frequency. The analysis still remains simple enough, enabling a derivation of analytical design equations. The considered applications include generating artificial magnetism using all-dielectric cylinders, which is currently a very sought-after phenomenon in optical frequencies. We also study how negative refraction is achieved using magnetodielectric RA cylinders.
Description
Keywords
radial anisotropy, Mie scattering, artificial magnetism, double-negative media, metamaterials, homogenization
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Citation
Kettunen , H , Wallén , H & SIhvola , A 2015 , ' Tailoring effective media by Mie resonances of radially-anisotropic cylinders ' , Photonics , vol. 2 , no. 2 , pp. 509-526 . https://doi.org/10.3390/photonics2020509