title: Unusual magneto-optical behavior induced by local dielectric variations under localized surface plasmon excitations.
abstract: We study the effect of global and local dielectric variations on the polarization conversion rps response of ordered nickel nanowires embedded in an alumina matrix. When considering local changes, we observe a non-monotonous behavior of the rps, its intensity unusually modified far beyond to what it is expected for a monotonous change of the whole refractive index of the embedding medium. This is related to the local redistribution of the electromagnetic field when a localized surface plasmon is excited. This finding may be employed to develop and improve new biosensing magnetoplasmonic devices.
authors.affiliation: IMM-Instituto de Microelectrónica de Madrid (CNM-CSIC), Isaac Newton 8, PTM, Tres Cantos, E-28760 Madrid, Spain. juanb@imm.cnm.csic.es.
authors.forename: Juan B
authors.initials: JB
authors.lastname: González-Díaz
authors.forename: Antonio
authors.initials: A
authors.lastname: García-Martín
authors.forename: Gaspar Armelles
authors.initials: GA
authors.lastname: Reig