Plasmonic Au/Co/Au nanosandwiches with enhanced magneto-optical activity

J. B. Gonzalez-Diaz; A. Garcia-Martin; J. M. Garcia-Martin; A. Cebollada; G. Armelles; Borja Sepulveda; Yury Alaverdyan; Mikael Käll

doi:10.1002/smll.200700594

Plasmonic Au/Co/Au nanosandwiches with enhanced magneto-optical activity
Artikel i vetenskaplig tidskrift, 2008

A study was conducted to analyzed magneto-optical (MO) activity of thin films prepared by Au/Co/Au trilayers as surface plasmon polaritons. Trilyers exhibit a magnetic-field-induced nonreciprocal effect in the surface plasmon polariton propagation. The Au/Co/Au nanosandwiches, prepared by a self-assembly process, show localized surface plasmon resonances (LSPRs) that affect the optical properties of metallic nanostructures. The fabrication of the nanostructures was performed using colloidal lithography (CL). An atomic force microscopy was used to analyze the structure of thin films. The polar Kerr ellipticity and rotation spectra for an array of nanoparticles with identical dimensions were examined. Metal trilyer films were sputtered onto glass substrates. Results show that nanoparticles can be used for the development of high-sensitive magnetoplasmonic nanosensors with multiplexing capabilities.

METAL NANOPARTICLES

nanoparticles

ferromagnetic materials

OPTICAL-PROPERTIES

RESONANCE

plasmonics

optics

WAVE-GUIDES

SIZE

SENSITIVITY

magneto-optical activity

SILVER NANOPARTICLES

SPECTROSCOPY

GOLD

COLLOIDAL LITHOGRAPHY