The Faraday effect in magnetoplasmonic nanostructures with spatial modulation of magnetization

TL;DR

This paper investigates how spatial modulation of magnetization in magnetoplasmonic nanostructures can resonantly enhance the Faraday effect, enabling spectrally selective detection of short spin waves in magnetic materials.

Contribution

It demonstrates that nonuniform, periodically modulated magnetization in nanostructures can cause resonant enhancement of the Faraday effect across plasmonic and waveguide modes.

Findings

Resonant enhancement of Faraday effect observed in modulated nanostructures.

Both s- and p-polarized light exhibit this enhancement.

Potential for spectrally selective detection of spin waves.

Abstract

The magneto-optical Faraday effect in the magnetoplasmonic nanostructures with nonuniform, periodically modulated spatial distribution of the magnetization is considered. It is shown that in such nanostructures the Faraday effect can experience the resonant enhancement in the spectral range of the plasmonic and waveguide optical modes excitation. It happens both for $s$ and $p$-polarized light. Such an effect can serve for the spectrally selective detection of the short spin waves in the magnetic materials.