High Magneto‐Optical Activity and Low Optical Losses in Metal‐Dielectric Au/Co/Au–SiO₂ Magnetoplasmonic Nanodisks

Abstract

Metal-dielectric Au-Co-SiO(2) magnetoplasmonic nanodisks are found to exhibit large magneto-optical activity and low optical losses. The internal architecture of the nanodisks is such that, in resonant conditions, the electromagnetic field undertakes a particular spatial distribution. This makes it possible to maximize the electromagnetic field at the magneto-optically active layers and minimize it in the other, optically lossy ones.