title: Magneto-Optical Activity in High Index Dielectric Nanoantennas.
abstract: The magneto-optical activity, namely the polarization conversion capabilities of high-index, non-absorbing, core-shell dielectric nanospheres is theoretically analyzed. We show that, in analogy with their plasmonic counterparts, the polarization conversion in resonant dielectric particles is linked to the amount of electromagnetic field probing the magneto-optical material in the system. However, in strong contrast with plasmon nanoparticles, due to the peculiar distribution of the internal fields in resonant dielectric spheres, the magneto-optical response is fully governed by the magnetic (dipolar and quadrupolar) resonances with little effect of the electric ones.
authors.affiliation: Departamento de Física de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto "Nicolás Cabrera", Universidad Autónoma de Madrid, 28049, Madrid, Spain.|Donostia International Physics Center (DIPC), P. Manuel de Lardizabal 4, Donostia-San Sebastián 20018, Spain.
authors.forename: N
authors.initials: N
authors.lastname: de Sousa
authors.affiliation: Department of Physics, University of Fribourg, Chemin du Musée 3, CH-1700 Fribourg, Switzerland.
authors.forename: L S
authors.initials: LS
authors.lastname: Froufe-Pérez
authors.affiliation: Donostia International Physics Center (DIPC), P. Manuel de Lardizabal 4, Donostia-San Sebastián 20018, Spain.|IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain.
authors.forename: J J
authors.initials: JJ
authors.lastname: Sáenz
authors.affiliation: IMM - Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, E-28760 Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: García-Martín