Localized magnetic plasmons in all-dielectric μ < metastructures
Entity
UAM. Departamento de Física de la Materia CondensadaPublisher
American Physical SocietyDate
2015-06-11Citation
10.1103/PhysRevB.91.235120
Physical Review B - Condensed Matter and Materials Physics 91.23 (2015): 235120
ISSN
1098-0121 (print); 1550-235X (online)DOI
10.1103/PhysRevB.91.235120Funded by
This work was supported by the Spanish MINECO (FIS2012-31070 and FIS2012-36113) and Consolider-Ingenio EMET (CSD2008-00066)Project
Gobierno de España. FIS2012-31070; Gobierno de España. FIS2012-36113Editor's Version
http://dx.doi.org/10.1103/PhysRevB.91.235120Subjects
Metamaterials; Magnetic plasmons; Permeability; Sphere; FísicaRights
©2015 American Physical SocietyAbstract
Metamaterials are known to exhibit a variety of electromagnetic properties nonexisting in nature. We show that an all-dielectric (nonmagnetic) system consisting of deep-subwavelength, high-permittivity resonant spheres possesses effective negative magnetic permeability (dielectric permittivity being positive and small). Due to the symmetry of the electromagnetic wave equations in classical electrodynamics, localized “magnetic” plasmon resonances can be excited in a metasphere made of such metamaterial. This is theoretically demonstrated by the coupled-dipole approximation and numerically for real spheres, in full agreement with the exact analytical
solution for the scattering process by the same metasphere with effectivematerial properties predicted by effective medium theory. The emergence of this phenomenon as a function of structural order within the metastructures is also studied. Universal conditions enabling effective negative magnetic permeability relate subwavelength sphere
permittivity and size with critical filling fraction. Our proposal paves the way towards (all-dielectric) magnetic plasmonics, with a wealth of fascinating applications
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Google Scholar:Paniagua-Domínguez, R.
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Froufe-Pérez, Luis S.
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Sáenz Gutiérrez, Juan José
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Sánchez-Gil, J. A.
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