Surface-enhanced magneto-optics in metallic multilayer films

Hermann, C.; Kosobukin, V. A.; Lampel, G.; Peretti, J.; Safarov, V. I.; Poumellec, Bertrand

doi:10.1103/physrevb.64.235422

Cited by 165 publications

(107 citation statements)

References 16 publications

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“…The MO effects of a MP multilayer are strongly amplified when the SPP excitation condition is satisfied, [17][18][19] which is reflected in a great enhancement of ⌬R pp / R pp ͓see Fig. 1͑b͔͒ in resonance condition.…”

Section: Introductionmentioning

confidence: 99%

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

Regatos¹,

Fariña²,

Calle³

et al. 2010

Journal of Applied Physics

100

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In this paper, we analyze the magnetoplasmonic ͑MP͒ features and sensing capabilities of Au/Fe/Au trilayer structures, as transducers of the magneto-optic surface plasmon resonance ͑MOSPR͒ biosensor. This biosensor, which can surpass the sensitivity of the standard SPR sensor, is based on a MP modulation technique generated by the simultaneous stimulation of the surface plasmon polaritons ͑SPP͒ and the transversal magneto-optical Kerr effect ͑TMOKE͒. We study the magneto-optical activity of the trilayers as a function of the thickness and position of the Fe layer. We first demonstrate that this kind of structure allows modulating the SPP through an external magnetic field and moreover, induce a strong enhancement of the TMOKE effect. The modulation of the SPP is linearly proportional to the thickness of Fe layer and inversely proportional to the distance between the Fe layer and the external dielectric medium. Finally, we experimentally confirm a twofold increase in the MOSPR sensitivity with respect to the intensity-interrogated SPR biosensor in bulk refractive-index changes, keeping a similar chemical resistance and stability, unprecedented in other MP transducers, and biofunctionalization protocols.

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Section: Introductionmentioning

confidence: 99%

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

Regatos¹,

Fariña²,

Calle³

et al. 2010

Journal of Applied Physics

100

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“…Very recently, Liu et al 29 reported also on the generation of Ni nanoparticles by ultrafast PLD, but no magnetic characterization was included. In addition, the influence of surface-plasmon resonances in the magneto-optical ͑magne-toplasmonic͒ activity of noble-metal/ferromagnet/noblemetal continuous films and nanodiscs has recently been highlighted, [32][33][34][35] and there is a growing interest in exploring similar phenomena in systems fabricated using innovative methods.…”

Section: Introductionmentioning

confidence: 99%

Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition

Cebollada

Martin²,

Clavero³

et al. 2009

Phys. Rev. B

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We present a detailed study on the morphology and magnetic properties of Co nanostructures deposited onto oxidized Si substrates by femtosecond pulsed laser deposition. Generally, Co disks of nanometric dimensions are obtained just above the ablation threshold, with a size distribution characterized by an increasingly larger number of disks as their size diminishes, and with a maximum disk size that depends on the laser power density. In Au/Co/Au structures, in-plane magnetic anisotropy is observed in all cases, with no indication of superparamagnetism regardless of the amount of material or the laser power density. Magnetic force microscopy observations show coexistence of single-domain and vortex states for the magnetic domain structure of the disks. Superconducting quantum interference device magnetometry and x-ray magnetic circular dichroism measurements point to saturation magnetization values lower than the bulk, probably due to partial oxidation of the Co resulting from incomplete coverage by the Au capping layer.

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“…[8] In these so called magnetoplasmonic systems high values of MO activity may be achieved upon plasmon excitation. [9,10,11,12] Moreover, due to their magneto-optical activity, plasmonic properties can be modulated under the action of an external magnetic field. [13] These two effects find application niches in, for example, sensing or telecommunications.…”

Section: Introductionmentioning

confidence: 99%

Magnetic field modulation of chirooptical effects in magnetoplasmonic structures

et al. 2014

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In this work we analyse the magnetic field effects on the chirooptical properties of nm has a larger chirooptical response than the resonance at 650 nm, which, on the other hand, exhibits a larger magnetic field modulation of its chirooptical response.This dissimilar behaviour is due to the different physical origin of the chirooptical and magneto-optical responses. Whereas the chirooptical effects are due to the geometry of the structures, the magneto-optical response is related to the intensity of the electromagnetic field in the magnetic (Co) layers. We also show that the optical chirality can be modulated by the applied magnetic field, which suggests

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Surface-enhanced magneto-optics in metallic multilayer films

Cited by 165 publications

References 16 publications

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

Au/Fe/Au multilayer transducers for magneto-optic surface plasmon resonance sensing

Growth and magnetic characterization of Co nanoparticles obtained by femtosecond pulsed laser deposition

Magnetic field modulation of chirooptical effects in magnetoplasmonic structures

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