Abstract

An amplification of the transverse magneto-optical Kerr effect in the magneto-plasmonic nanostructures with gain is reported. The ferromagnetic dielectric doped with the rear-earth ions plays the role of gain material in the magneto-plasmonic nanostructure. The stimulated emission of dopants in the external field of the surface plasmon polariton wave allows to compensate Ohmic losses in the ferromagnetic dielectric. It leads to an amplification of the surface plasmon polariton wave, and to the decrease of the magneto-optical resonance width in the nanostructure. Therefore, a Q-factor of magneto-optical resonance in the transmission rises significantly.

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