Light localisation and magneto-optic enhancement in Ni anti-dot arrays
Abstract
The excitation of surface plasmons in magnetic nano-structures can strongly influence their magneto-optical properties. Here, we use photoemission electron microscopy to map the spatial distribution of the electric near-field on a nano-patterned magnetic surface that supports plasmon polaritons. By using different photon energies and polarization states of the incident light we reveal that the electric near-field is either concentrated in spots forming a hexagonal lattice with the same symmetry as the Ni nano-pattern or in stripes oriented along the -K direction of the lattice and perpendicular to the polarization direction. We show that the polarization-dependent near-field enhancement on the patterned surface is directly correlated to both the excitation of surface plasmon polaritons on the patterned surface as well as the enhancement of the polar magneto-optical Kerr effect.
Keywords
Cite
@article{arxiv.1507.05538,
title = {Light localisation and magneto-optic enhancement in Ni anti-dot arrays},
author = {Markus Rollinger and Philip Thielen and Emil Melander and Erik Östman and Vassilios Kapaklis and Björn Obry Mirko Cinchetti and A. Garcia-Martin and Martin Aeschlimann and Evangelos Th. Papaioannou},
journal= {arXiv preprint arXiv:1507.05538},
year = {2016}
}