Plasmon resonance enhancement of Faraday rotation of liquid phase epitaxy grown garnet films populated with gold nanoparticles on the film surfaces

Abstract

Enhancement of the Faraday rotation of rare-earth iron garnet thin films offers the promise for development of compact and higher performance polarization dependent optical devices. Faraday rotation enhancement has been achieved utilizing strong localized electric fields induced by the excitation of plasmon resonances in gold nanoparticles deposited on garnet films. This paper presents experimental results that reveal strong Faraday rotation enhancement in bismuth-doped garnet films with gold nanoparticles of various dimensions and separations deposited on the epitaxial films. Stronger enhancements can be obtained by increasing the height and relative spacing between the nanoparticles formed on the garnet film surfaces.

Enhanced magneto-optical effects in composite coaxial nanowires embedded with Ag nanoparticles

“…Nanowire (NW) arrays are preferred and widely used for this optimization because of their low reflectance and cavity effect 14 15 16 . Additionally, nanostructures decorated with noble metals have been extensively introduced to enhance the Faraday effect through surface plasmon polariton (SPP) or localized surface plasmon resonance (LSPR) effects 5 11 12 17 18 19 20 21 22 23 24 25 . These effects generate strong light scattering and intensive absorption bands and also enhance the local electromagnetic fields 26 .…”

“…For example, Belotelov et al . 24 fabricated an MO material consisting of a nanostructured gold film on top of an FM dielectric and reported SPP-enhanced MO effects. Jain et al .…”