Coupled mode enhanced giant magnetoplasmonics transverse Kerr effect

Halagačka, Lukáš; Vanwolleghem, Mathias; Postava, Kamil; Dagens, B.; Pištora, Jaromı́r

doi:10.1364/oe.21.021741

Cited by 53 publications

(44 citation statements)

References 35 publications

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“…Therefore, the T‐MOKE signal is defined as the reflectivity difference between the two opposite saturated magnetization states of the Co layer normalized by the reflectivity in demagnetized state R (0)

\frac{Δ R}{R} = \frac{R (+ M_{y}^{normals}) - R (- M_{y}^{normals})}{R (0)},

where

R (\pm M_{normaly}^{normals})

are the reflectivity for opposite magnetizations. This definition gives contrast of the change in reflectivity against the unperturbed reflectivity R (0), but introduces an artificial enhancement in the T‐MOKE signal as result of the reflectivity minimum close to plasmon resonance angle . Therefore, we use an alternative definition of the T‐MOKE signal measurement, i.e., the change in reflectivity under magnetization inversion

Δ R = R (+ M_{y}^{normals}) - R (- M_{y}^{normals}) .

…”

Section: Theoretical Methodsmentioning

confidence: 99%

“…This definition gives contrast of the change in reflectivity against the unperturbed reflectivity R (0), but introduces an artificial enhancement in the T‐MOKE signal as result of the reflectivity minimum close to plasmon resonance angle . Therefore, we use an alternative definition of the T‐MOKE signal measurement, i.e., the change in reflectivity under magnetization inversion

Δ R = R (+ M_{y}^{normals}) - R (- M_{y}^{normals}) .

…”

Section: Theoretical Methodsmentioning

confidence: 99%

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Maximization of surface-enhanced transversal magneto-optic Kerr effect in Au/Co/Au thin films

Herreño-Fierro

Patiño

2014

Phys. Status Solidi B

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In order to maximize the transversal magneto optic Kerr effect (T-MOKE) of a Au/Co/Au structure we propose a method to obtain the optimum thickness values. A criteria based on preserving good plasmonic properties has been included as part of this method. Using the theoretical prediction we grew Au/Co/Au trilayers and perform optical and MO characterization using the Kretschmann configuration.The results admit very easy interpretation in terms of the interaction between the magneto-optical and plasmonic properties dictating the optimal thicknesses of the structure. Moreover we have grown and characterized the optimized structure finding good agreement with theory reaching, for a 532 nm green laser, a maximal surface magneto-optic (MO) signal enhancement of close to nine folds with respect to the signal without plasmonic excitation. IntroductionThe interaction of electromagnetic field with electrons at the interface between a metal and a dielectric leads to a collective oscillation of conduction electrons known as surface plasmon polaritons (SPPs). These collective oscillations can be excited by incident light that matches its frequency and linear momentum. Furthermore it has been broadly demonstrated that SPPs enhance the magnetooptical activity of nano-structured systems . This occurs even for those structures made of purely nonferromagnetic metals under small magnetic fields [10]. This effect has been found to enhanced the sensing capabilities of biosensors [23,24] and novel magnetoplasmonic devices [25,26]. Such devices are currently a very active area of research. The aim is to achieve control of the SPP properties by external magnetic field [27,28]. One way to achieve such control is to intercalate noble and ferromagnetic metals in a metal/ferromagnet/metal trilayer structure [5,15,16,18,19,21]. In such structures called magnetoplasmonic (MP) materials, the noble-metal layers provide

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\frac{Δ R}{R} = \frac{R (+ M_{y}^{normals}) - R (- M_{y}^{normals})}{R (0)},

where

R (\pm M_{normaly}^{normals})

Δ R = R (+ M_{y}^{normals}) - R (- M_{y}^{normals}) .

…”

Section: Theoretical Methodsmentioning

confidence: 99%

Δ R = R (+ M_{y}^{normals}) - R (- M_{y}^{normals}) .

…”

Section: Theoretical Methodsmentioning

confidence: 99%

Maximization of surface-enhanced transversal magneto-optic Kerr effect in Au/Co/Au thin films

Herreño-Fierro

Patiño

2014

Phys. Status Solidi B

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“…The dispersion of modes is taken with respect to a variation of the geometry of the grating as was previously theoretically discussed. 18 …”

Section: Mueller Matrix Ellipsometrymentioning

confidence: 99%

“…18,19 We demonstrate experimentally and compare with numerical simulations how the nonreciprocal optical response, i.e. spectral position of SPPs peak, is affected by the interaction with the FP cavity mode.…”

Section: Introductionmentioning

confidence: 97%

Experimental demonstration of anomalous nonreciprocal optical response of 1D periodic magnetoplasmonic nanostructures

Halagačka

Vanwolleghem

Vaurette

et al. 2014

Integrated Optics: Devices, Materials, and Technologies XVIII

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In this paper we analyze the optical and transversal magnetooptical (MO) response of magnetoplasmonic (MP) nanostructures. The MP structure is a 1D periodic gold grating fabricated by lift-off technique on the MO dielectric substrate (Bi-substituted yttrium iron garnet BixY3−xFe5O12). Following our recent theoretical work (Opt. Express 21, pp. 2174121755, Sep 2013.), we confirm here experimentally the predicted dependence of the MO response on the geometry of the grating, that is directly attributed to the anticrossing behavior of the Fabry-Perot (FP) resonance in the grating's slits and the surface plasmon resonances (SPPs) at its interfaces. The experimental results were achieved by Mueller matrix spectroscopic ellipsometry. Observed fine tuning of the transverse magneto-optic Kerr opens up new possibilities for the design of compact nonreciprocal devices

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“…The attainment of a large TMOKE response is important for many practical applications that include, but not limited to, 3D imaging [2], magnonics [3, 4], and MO data storage [1].The natural TMOKE response of continuous single magnetic thin-films is weak and its detection is challenging. Consequently, a large and growing body of research investigates different mechanisms of the enhancement of the TMOKE in thin-film multilayers [5], magneto-plasmonic crystals [6][7][8][9][10][11], and nanoantennas [12,13]. All nanostructures mentioned above consist solely of ferromagnetic and nonmagnetic (e.g., gold) metals or contain a nonmagnetic metal nanostructure combined with a magneto-insulating layer.Pure ferromagnetic magneto-plasmonic nanostructures made, e.g., of nickel (Ni) or permalloy (Py=Ni 80 Fe 20 ) [8,9,12,13] are gaining increasing attention due to their potential for integration with microwave magnonics devices (magnons are the quanta of magnetisation precession in ferromagnetic media).…”

mentioning

confidence: 99%

Transverse magneto-optical Kerr effect in subwavelength dielectric gratings

Maksymov¹,

Hutomo²,

Kostylev³

2014

Opt. Express

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We demonstrate theoretically a large transverse magneto-optical Kerr effect (TMOKE) in subwavelength gratings consisting of alternating magneto-insulating and nonmagnetic dielectric nanostripes. The reflectivity of the grating reaches 96% at the frequencies corresponding to the maximum of the TMOKE response. The combination of a large TMOKE response and high reflectivity is important for applications in 3D imaging, magneto-optical data storage, and magnonics.

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Coupled mode enhanced giant magnetoplasmonics transverse Kerr effect

Cited by 53 publications

References 35 publications

Maximization of surface-enhanced transversal magneto-optic Kerr effect in Au/Co/Au thin films

Maximization of surface-enhanced transversal magneto-optic Kerr effect in Au/Co/Au thin films

Experimental demonstration of anomalous nonreciprocal optical response of 1D periodic magnetoplasmonic nanostructures

Transverse magneto-optical Kerr effect in subwavelength dielectric gratings

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