Magneto-optical Kerr spectra of nickel

Višňovský, Š.; Parizek, V.; Nývlt, M.; Kielar, P.; Prosser, V.; Krishnan, R.

doi:10.1016/0304-8853(93)90206-h

Cited by 57 publications

(26 citation statements)

References 6 publications

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“…For instance, an external magnetic field is capable of changing the rotation of polarization by a thin layer of magneto-optical material, which is termed the Faraday effect in transmission geometry 1,2 and polar Kerr effect in reflection geometry. [3][4][5][6] Such a magnetic field can also influence the intensity of light transmitted and reflected in scenarios of the transverse magneto-optical Kerr effect [7][8][9] and longitudinal magneto-photonic intensity effect. 10 Applying a magnetic field to magneto-optical materials can also change the nonlinear optical effects of the material.…”

Section: Introductionmentioning

confidence: 99%

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

et al. 2015

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We experimentally demonstrate an ultra-thin plasmonic optical rotator in the visible regime that induces a polarization rotation that is continuously tunable and switchable by an external magnetic field. The rotator is a magneto-plasmonic hybrid structure consisting of a magneto-optical EuSe slab and a one-dimensional plasmonic gold grating. At low temperatures, EuSe possesses a large Verdet constant and exhibits Faraday rotation, which does not saturate over a regime of several Tesla. By combining these properties with plasmonic Faraday rotation enhancement, a large tuning range of the polarization rotation of up to 8.46 for a film thickness of 220 nm is achieved. Furthermore, through experiments and simulations, we demonstrate that the unique dispersion properties of the structure enable us to tailor the wavelengths of the tunable polarization rotation to arbitrary spectral positions within the transparency window of the magneto-optical slab. The demonstrated concept might lead to important, highly integrated, non-reciprocal, photonic devices for light modulation, optical isolation, and magnetic field optical sensing. The simple fabrication of EuSe nanostructures by physical vapor deposition opens the way for many potentially interesting magneto-plasmonic systems and three-dimensional magneto-optical metamaterials.

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Section: Introductionmentioning

confidence: 99%

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

et al. 2015

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“…6(a) and 6(b)) and the calculated values (Figs. 6(c) and 6(d)) using dielectric optical and MO susceptibilities data sets taken from literature [72,73]. It is worthy to point out that the agreement is obtained without the need of any adjustable parameters.…”

Section: Comparison With Experimentsmentioning

confidence: 76%

Polarizability and magnetoplasmonic properties of magnetic general nanoellipsoids

et al. 2013

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An approach to compute the polarizability tensor of magnetic nanoparticles having general ellipsoidal shape is presented. We find a surprisingly excellent quantitative agreement between calculated and experimental magneto-optical spectra measured in the polar Kerr configuration from nickel nanodisks of large size (exceeding 100 nm) with circular and elliptical shape. In spite of its approximations and simplicity, the formalism presented here captures the essential physics of the interplay between magneto-optical activity and the plasmonic resonance of the individual particle. The results highlight the key role of the dynamic depolarization effects to account for the magneto-optical properties of plasmonic nanostructures. ©2013 Optical Society of AmericaOCIS codes: (290.5850) Scattering, particles; (160.1190) Anisotropic optical materials; (160.3820) Magneto-optical materials. References and links1. M. Sandtke and L. Kuipers, "Slow guided surface plasmons at telecom frequencies," Nat. Photonics 1(10), 573-576 (2007). 2. V. E. Ferry, L. A. Sweatlock, D. Pacifici, and H. A. Atwater, "Plasmonic nanostructure design for efficient light coupling into solar cells," Nano Lett. 8(12), 4391-4397 (2008). 3. S. Lal, S. Link, and N. J. Halas, "Nano-optics from sensing to waveguiding," Nat. Photonics 1(11), 641-648 (2007 5333-5338 (2011). 12. J. Chen, P. Albella, Z. Pirzadeh, P. Alonso-González, F. Huth, S. Bonetti, V. Bonanni, J. Åkerman, J. Nogués, P.Vavassori, A. Dmitriev, J. Aizpurua, and R. Hillenbrand, "Plasmonic nickel nanoantennas," Small 7 ( Ration. Mech. Anal. 188(1), 93-116 (2008). 47. W. L. Bragg and A. B. Pippard, "The form birefringence of macromolecules," Acta Crystallogr. 6(11), 865-867 (1953). 48. One should consider also the phase difference due to the incoming light hitting a finite size body. There are several ways to account for this phase difference reported in literature [30,32, 49]. Although, we verified that inclusion of these corrections have negligible effects, and therefore for sake of clarity we neglect them. We point out, in addition, that for the particular geometry used in our experiments, namely perpendicular incidence over flat disks, this phase difference effects are rigorously zero. 385-420 (1904). 60. A. Lakhtakia, "General theory of Maxwell-Garnett model for particulate composites with bi-isotropic host materials," Int. J. Electron. 73(6), 1355-1362 (1992). 61. M. Abe, "Derivation of non-diagonal effective dielectric-permeability tensors for magnetized granular composites," Phys. Rev. B 53(11), 7065-7075 (1996). 62. M. Abe and T. Suwa, "Surface plasma resonance and magneto-optical enhancement in composites containing multicore-shell structured nanoparticles," Phys. 50(15), 950-952 (1987). 64. T. K. Xia, P. M. Hui, and D. Stroud, "Theory of Faraday rotation in granular magnetic materials," J.

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“…1(a)]. Having obtained the effective ε ↔ med , we calculate the Faraday rotation and ellipticity using Yeh's formalism [26][27][28][29] (see details in the Appendix). The main difficulty in this approach is the calculation of the effective permittivity tensor ε ↔ med of the composite system, which is discussed in the following.…”

Section: Description Of the Effective-medium Modelmentioning

confidence: 99%

Expanding Effective-Medium Theory to Optical Diamagnetic Responses in Magnetoplasmonic Colloids

et al. 2014

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Plasmon resonances are widely used to enhance the magneto-optical responses of ferromagnetic materials. Yet, the possibility of exploiting plasmonics to boost the magneto-optic signals of diamagnetic systems is far less common. Here, we develop a comprehensive effective-medium model that anticipates with high accuracy both the ferromagnetic and diamagnetic magneto-optical responses of magnetic colloids. Experiments validate our model, for which the effective-medium Verdet constant is strongly increased by localized plasmon resonances. Our work underlines the potential of plasmon-enhanced diamagnetic optical responses for high-magnetic-field applications and plasmon-based detection.

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Magneto-optical Kerr spectra of nickel

Cited by 57 publications

References 6 publications

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

Tunable and switchable polarization rotation with non-reciprocal plasmonic thin films at designated wavelengths

Polarizability and magnetoplasmonic properties of magnetic general nanoellipsoids

Expanding Effective-Medium Theory to Optical Diamagnetic Responses in Magnetoplasmonic Colloids

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