title: Tuning the magneto-optical response of nanosize ferromagnetic Ni disks using the phase of localized plasmons.
abstract: We explore the influence of the phase of localized plasmon resonances on the magneto-optical activity of nanoferromagnets. We demonstrate that these systems can be described as two orthogonal damped oscillators coupled by the spin-orbit interaction. We prove that only the spin-orbit induced transverse plasmon plays an active role on the magneto-optical properties by controlling the relative amplitude and phase lag between the two oscillators. Our theoretical predictions are fully confirmed by magneto-optical Kerr effect and optical extinction measurements in nanostructures of different size and shape.
authors.affiliation: CIC nanoGUNE Consolider, 20018 Donostia-San Sebastian, Spain.
authors.forename: Nicolò
authors.initials: N
authors.lastname: Maccaferri
authors.forename: Andreas
authors.initials: A
authors.lastname: Berger
authors.forename: Stefano
authors.initials: S
authors.lastname: Bonetti
authors.forename: Valentina
authors.initials: V
authors.lastname: Bonanni
authors.forename: Mikko
authors.initials: M
authors.lastname: Kataja
authors.forename: Qi Hang
authors.initials: QH
authors.lastname: Qin
authors.forename: Sebastiaan
authors.initials: S
authors.lastname: van Dijken
authors.forename: Zhaleh
authors.initials: Z
authors.lastname: Pirzadeh
authors.forename: Alexandre
authors.initials: A
authors.lastname: Dmitriev
authors.forename: Josep
authors.initials: J
authors.lastname: Nogués
authors.forename: Johan
authors.initials: J
authors.lastname: Åkerman
authors.forename: Paolo
authors.initials: P
authors.lastname: Vavassori