Magneto-Optical Activity in High Index Dielectric Nanoantennas

Sousa, N. de; Froufe-Pérez, Luis S.; Sáenz, Juan José; García-Martín, A.

doi:10.1038/srep30803

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Journal article

Magneto-Optical Activity in High Index Dielectric Nanoantennas

Sousa, N. de Departamento de Física de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto “Nicolás Cabrera”, Universidad Autónoma de Madrid, Spain - Donostia International Physics Center (DIPC), Donostia-San Sebastián, Spain
Froufe-Pérez, Luis S. Department of Physics, University of Fribourg, Switzerland
Sáenz, Juan José Donostia International Physics Center (DIPC), Donostia-San Sebastián, Spain - IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
García-Martín, A. IMM - Instituto de Microelectrónica de Madrid (CNM-CSIC), Spain

04.08.2016

Published in:

Scientific Reports. - 2016, vol. 6, p. 30803

English 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.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language