Enhanced magneto-optical effects in magnetoplasmonic crystals

Belotelov, V. I.; Акимов, И. А.; Pohl, M.; Котов, В. А.; Kasture, Sachin; Vengurlekar, A. S.; Achanta, Venu Gopal; Yakovlev, D. R.; Zvezdin, A. K.; Bayer, М.

doi:10.1038/nnano.2011.54

Cited by 544 publications

(381 citation statements)

References 41 publications

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“…Plasmonic structures composed of a number of individual elements, for example, give rise to Fano resonance effects that induce electromagnetically induced transparency (EIT) [2][3][4][5][6][7][8]. Similar phenomena have also been found in magnetoplasmonic nanosystems [9], i.e., those sharing magnetic and plasmonic functionalities and that therefore allow a further degree of freedom, namely, the external control of the system response [10][11][12][13][14]. By an adequate design of their internal structure, it is possible to obtain configurations which provide enhanced magnetooptical (MO) activity upon plasmon resonance excitation [15][16][17][18], which allow one to probe the electromagnetic (EM) field distribution inside a metallic nanoelement [19], or which yield high MO activity and low optical losses with MO figures of merit comparable with those of garnet structures [13].…”

mentioning

confidence: 82%

Interaction effects on the magneto-optical response of magnetoplasmonic dimers

Sousa

Froufe‐Pérez

Armelles³

et al. 2014

Phys. Rev. B

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The effect that dipole-dipole interactions have on the magneto-optical (MO) properties of magnetoplasmonic dimers is theoretically studied. The specific plasmonic versus magnetoplasmonic nature of the dimer's metallic components and their specific location within the dimer play a crucial role in the determination of these properties. We find that it is possible to generate an induced MO activity in a purely plasmonic component, even larger than that of the MO one, therefore dominating the overall MO spectral dependence of the system. Adequate stacking of these components may allow one to obtain, for specific spectral regions, larger MO activities in systems with a reduced amount of MO metal and therefore with lower optical losses. Theoretical results are contrasted and confirmed with experiments for selected structures. Smart nanoscale systems are able to interact with light in an intricate fashion [1], which is strongly dependent on the internal electromagnetic interaction between the constituent elements of the system. Plasmonic structures composed of a number of individual elements, for example, give rise to Fano resonance effects that induce electromagnetically induced transparency (EIT) [2][3][4][5][6][7][8]. Similar phenomena have also been found in magnetoplasmonic nanosystems [9], i.e., those sharing magnetic and plasmonic functionalities and that therefore allow a further degree of freedom, namely, the external control of the system response [10][11][12][13][14]. By an adequate design of their internal structure, it is possible to obtain configurations which provide enhanced magnetooptical (MO) activity upon plasmon resonance excitation [15][16][17][18], which allow one to probe the electromagnetic (EM) field distribution inside a metallic nanoelement [19], or which yield high MO activity and low optical losses with MO figures of merit comparable with those of garnet structures [13]. Furthermore, in dimers where one of the elements is purely plasmonic and the other is of magnetoplasmonic nature, interaction effects cause the magnetoplasmonic component to induce MO activity in the plasmonic one (which intrinsically lacks MO activity) [20]. For specific interelement distances, which determine the interaction between them, this brings as a consequence the equivalent of the EIT in the MO spectrum of the system, i.e., a cancellation of the MO activity in a narrow spectral range due to the competition between the intrinsic MO contribution of the magnetoplasmonic component and the induced MO contribution of the plasmonic one [20]. As this effect exhibits a narrow spectral feature in the MO response, it may find applications in sensing and telecommunication areas, and a complete understanding will help in the development of novel sensing and biosensing architectures as well as MO devices.* a.garcia.martin@csic.esIn this context, these induced MO activity effects and their influence on the overall MO activity of the system for specific ranges of interaction lead to the consideration of additional issues where th...

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mentioning

confidence: 82%

Interaction effects on the magneto-optical response of magnetoplasmonic dimers

Sousa

Froufe‐Pérez

Armelles³

et al. 2014

Phys. Rev. B

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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%

“…In recent years, plasmons have proved capable of enhancing a number of magneto-optical effects, 4,5,8,9,36 which demonstrates their potential for ultra-thin magneto-optical devices. Using plasmons to enhance the Faraday effect has been proposed theoretically 37,38 and demonstrated experimentally.…”

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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“…Combining plasmonics with magneto-optics is of particular interest [2][3][4][5][6][7][8] , as it enables sophisticated control of magneto-optical material properties, which can lead to many optical devices where magnetism is applied. For example, by hybridizing ferromagnetic and noble metal materials, the magneto-optical polar Kerr effect was enhanced, which was termed 'magneto-plasmonics' 9,10 .…”

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confidence: 99%

Nonreciprocal plasmonics enables giant enhancement of thin-film Faraday rotation

et al. 2013

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Light propagation is usually reciprocal. However, a static magnetic field along the propagation direction can break the time-reversal symmetry in the presence of magneto-optical materials. The Faraday effect in magneto-optical materials rotates the polarization plane of light, and when light travels backward the polarization is further rotated. This is applied in optical isolators, which are of crucial importance in optical systems. Faraday isolators are typically bulky due to the weak Faraday effect of available magneto-optical materials. The growing research endeavour in integrated optics demands thin-film Faraday rotators and enhancement of the Faraday effect. Here, we report significant enhancement of Faraday rotation by hybridizing plasmonics with magneto-optics. By fabricating plasmonic nanostructures on laser-deposited magneto-optical thin films, Faraday rotation is enhanced by one order of magnitude in our experiment, while high transparency is maintained. We elucidate the enhanced Faraday effect by the interplay between plasmons and different photonic waveguide modes in our system.

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Enhanced magneto-optical effects in magnetoplasmonic crystals

Cited by 544 publications

References 41 publications

Interaction effects on the magneto-optical response of magnetoplasmonic dimers

Interaction effects on the magneto-optical response of magnetoplasmonic dimers

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

Nonreciprocal plasmonics enables giant enhancement of thin-film Faraday rotation

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