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Open Access item Plasmon-enhanced magneto-optical activity in ferromagnetic membranes

Authors:González Díaz, Juan Bautista
García-Martín, José Miguel
García-Martín, Antonio
Navas, D.
Asenjo, Agustina
Vázquez, M.
Hernández Vélez, M.
Armelles Reig, Gaspar
Keywords:Electrodes, Ferromagnetic materials, Kerr magneto-optical effect, Membranes, metallic thin films, Nickel, Optical rotation, Refractive index, Surface plasmon resonance
Issue Date:30-Jun-2009
Publisher:American Institute of Physics
Citation:Applied Physics Letters, 94 (2009)
Abstract:Experimental and theoretical evidence of plasmon-enhanced Kerr rotation in purely ferromagnetic membranes with sufficiently small dimensions to be out of extraordinary optical transmission conditions (45 nm pore diameter, 90nm lattice constant), is reported in this work. It is shown that the spectral location of the enhanced Kerr rotation region varies as the refractive index of the material inside the pore is modified. A similar behavior is obtained if the pore radius changes while keeping the pore concentration unchanged. Those are clear signatures indicating that localized surface plasmon resonances propagating along the pores govern the magneto-optical response of the membrane
Publisher version (URL):http://link.aip.org
http://dx.doi.org/10.1063/1.3167297
URI:http://hdl.handle.net/10261/15232
ISSN:0003-6951
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