In paper the results of modeling, synthesis and research of a double-resonant plasmonic structure for excitation the various mode of surface plasmon-polaritons (SPP) are presents. It's demonstrated the possibility for excitation of SPP resonances by combining the Kretschmann and Otto configurations on one asymmetric multilayer structure. The parameters of such structure were optimized for obtaining the most effective SPP excitation. It's considered the possibilities for using the proposed double-resonance plasmonic structure as an individual SPP-sensor and as a sensitive element of a plasmonic biosensor.

In article the synthesis and investigation results of magneto-optical (MO) properties of thin-film nanocomposite, which is a bismuth-substituted Bi: YIG ferrite garnet layer with Au plasmon nanoparticles are representative. The effect of vertical shift of MO hysteresis loops (relative to the origin of coordinates) was detected with study of MO properties during remagnetization of the magnetoplasmon composite structure. It’s shown that the observed effect is most pronounced near the condition of localized plasmon resonance in the metal nanoparticles system which make up the magnetoplasmonic composite.