High magneto-optical activity and low optical losses in metal-dielectric Au/Co/Au-SiO 2 magnetoplasmonic nanodisks

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. Copyright © 2012 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim.The authors acknowledge funding support from the EU (NMP3-SL-2008- 214107-Nanomagma), the Spanish MICINN (“FUNCOAT” CONSOLIDER INGENIO 2010 CSD2008-00023, MAGPLAS MAT2008-06765-C02-01/ NAN and PLASMAR MAT2010-10123-E), and the Comunidad de Madrid (“NANOBIOMAGNET”, S2009/MAT-1726 and “MICROSERES-CM”, S2009/TIC-1476, and JAE Doc fellowship for D.M.-R.).Peer Reviewe