Plasmonics has proven to be a powerful tool to improve the performance of optical devices. The possibility of modulating the emission, propagation and/or detection of radiation constitutes a promising aspect to expand the limits of the currently used technologies. In this sense, fast and contactless actuation on plasmon resonances via the Magneto-Optical (MO) effect has been put forward by the inclusion of ferromagnetic components into noble metal layers and nanostructures, yet up to now restricted to the visible and near-infrared ranges. Recently it has been shown that this magnetic field modulation can be extended to the mid -IR and THz region by the use of the Magneto-Refractive (MR) effect, i., a change in the optical properties of the system by magnetic field controlled electrical resistivity1,2,3 . In this talk we will review the effect that a magnetic field has on the plasmon properties and in particular this new alternative for magnetic modulation in the mid and far IR range using different plasmonic metasurfaces.

Trabajo presentado en el 10th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META), celebrado en Lisboa (Portugal), del 23 al 26 de julio de 2019