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Plasmonic Au/Co/Au Nanosandwiches with Enhanced Magneto-optical Activity


  • Financial support from the Spanish Ministry of Science and Education (NAN2004-09195-C04 and MAT2005-05524-C02-01), and UE (NoE-Phoremost) is gratefully acknowledged.


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A nanostructure composed of Au/Co/Au nanodisks is fabricated. The behaviour of this system is completely different to that of a continuous Au/Co/Au layer. There is a relative enhancement of the Kerr rotation and ellipticity, as well as a strong dependence on the particle size. The origin of these properties is the plasmonlike structure that is supported by the nanosandwiches.