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Title: Plasmon-enhanced magneto-optical activity in ferromagnetic membranes
Authors: González Díaz, Juan Bautista; García-Martín, José Miguel; García-Martín, Antonio; Navas, David; Asenjo Barahona, Agustina; Vázquez, M.; Hernández-Vélez, M.; Armelles Reig, Gaspar
Keywords: Electrodes
Ferromagnetic materials
Kerr magneto-optical effect
Membranes, metallic thin films
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
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ISSN: 0003-6951
DOI: 10.1063/1.3167297
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