Surface plasmon driven enhancement of linear and nonlinear magneto-optical Kerr effects in bimetallic magnetoplasmonic crystals in conical diffraction

Abstract

Nowadays, control of light based on the manipulation of surface plasmon polaritons (SPPs) in plasmonic crystals becomes a cornerstone of photonics. The authors study the SPP-driven enhancement of linear and nonlinear magneto-optical effects in magnetoplasmonic crystals (MPCs) based on corrugated gold and ferromagnetic films. A signature of the considered MPCs is the magnetic anisotropy mediated by the surface profile of a thin ferromagnetic layer, which allows to intertwine plasmonic effects with nonuniform magnetization, providing an extra venue for control of magneto-optical effects.