Magneto-optical effects in plasmonic slot waveguides

We studied two optical modes of the gyrotropic slot waveguide consisted of a magnetic dielectric sandwiched between to different metal walls. Different types of modes are identified including backward anti-symmetric plasmonic mode that has opposite direction of the phase and group velocities. Effect of the magneto-optical nonreciprocity in a transversal magnetic field is revealed and its pecularities for the backward mode are studied.