Plasmon-phonon interaction effects on the magneto refractive response of spintronic-plasmonic/dielectric structures

We study the electromagnetic interactions and the magnetic modulation of the optical response of resonant spintronic-plasmonic structures coupled to a dielectric. The resonant nature of the spintronic system is provided by arrays of slits whose localized plasmon resonance interacts with the phonon band of the dielectric located in the mid infrared spectral range. This interaction can be tuned by changing the length of the slits and the thickness of the dielectric. In addition, the electromagnetic interaction also endorses with magnetic modulation capabilities to the phonon band, originating from a non-ferromagnetic material. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement