We study the surface state-dependent magneto-optical properties of an ultrathin Floquet topological insulator (FTI) under influence external perpendicular magnetic field in terahertz frequency regime. Under picture, we treat circularly polarized off-resonant light as perturbation that introduces a mass gap at Dirac cone, thus, making state fermions massive. By tuning optical energy FTI thin-fil...

Magneto-plasmonics is a designation generally associated with ferromagnetic-plasmonic materials because such optical responses from nonmagnetic materials alone are considered weak. Here, we show that there exists a switching transition between linear and nonlinear magneto-optical behaviors in noble-metal nanocolloids that is observable at ultralow illumination intensities and direct current mag...