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Plasmon-enhanced magneto-optical activity in ferromagnetic membranes

AuthorsGonzález-Díaz, Juan B. ; García-Martín, José Miguel ; García-Martín, Antonio ; Navas, David ; Asenjo Barahona, Agustina ; Vázquez Villalabeitia, Manuel ; Hernández-Vélez, M.; Armelles Reig, Gaspar
Ferromagnetic materials
Kerr magneto-optical effect
Membranes, metallic thin films
Optical rotation
Refractive index
Surface plasmon resonance
Issue Date30-Jun-2009
PublisherAmerican Institute of Physics
CitationApplied Physics Letters, 94 (2009)
AbstractExperimental 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
Appears in Collections:(IMN-CNM) Artículos
(ICMM) Artículos
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