Large enhancement of Faraday rotation by localized surface plasmon resonance in Au nanoparticles embedded in Bi:YIG film

Uchida, Hironaga; Masuda, Yoshiki; Fujikawa, R.; Baryshev, A. V.; Inoue, M.

doi:10.1016/j.jmmm.2008.11.064

Cited by 89 publications

(57 citation statements)

References 11 publications

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“…This observation contradicts to the results for the Bi:YIG/Au composite films 4,8,9) . Since Ag is chemically active material, plasmonic Ag particles were separated from Bi:YIG by nonmagnetic Ag compounds.…”

Section: Methodscontrasting

confidence: 87%

“…Disagreement of wavelengths of the LSPR bands in Fig. 1 and 2 was induced by low temperature heating at 500 °C for the particle formations, since particles formed by low temperature tended to have the LSPR in long wavelength region with large deviation 4,9) . How can we prevent forming the compound shells around Ag particles?…”

Section: Methodsmentioning

confidence: 94%

“…Spectral position of LSPR depends on material and size of particles. We have recently reported that particles with large sizes provide small influence on the MO response 9) . Fabrication of Ag particles supporting LSPR is demonstrated 10) ; spectral position of LSPR significantly shifts to shorter wavelength as compared with that for Au particles.…”

Section: Introductionmentioning

confidence: 99%

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Magneto-optical plasmonic Bi:YIG composite films with Ag and Au-Ag alloy particles

et al. 2009

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To obtain enhancement and wavelength tuning of the magneto-optical (MO) response associated with the localized surface plasmon resonance (LSPR), bismuth-substituted yttrium iron garnet (Bi:YIG) composite films with Ag particles and Au-Ag alloy particles were studied. The Bi:YIG composite film with Ag particles did not show any enhancement of Faraday rotation. On the contrary, the Bi:YIG composite films with Au-Ag particles exhibited the enhancement of the MO response for different wavelengths of LSPR. We observed the enhanced Faraday rotation for the Bi:YIG/Au-Ag composite films with volume ratios of Ag up to 0.6. In addition, when changing the volume ratio of Ag, the peak of rotation shifted to short wavelengths. Disappearance of enhancement for the Bi:YIG/Ag composite film can be addressed to modifying the interfacial medium between the MO host and Ag. Since chemically active Ag particles can form nonmagnetic Ag compound shells separating Bi:YIG and the plasmonic subsystem, the LSPR of Ag particles did not affect the MO response. The Au-Ag alloy particles were chemically stable in the Bi:YIG/Au-Ag composite films.

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Section: Methodscontrasting

confidence: 87%

Section: Methodsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Magneto-optical plasmonic Bi:YIG composite films with Ag and Au-Ag alloy particles

et al. 2009

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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 .…”

mentioning

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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“…14 Localized surface plasmon excitation in MO composites containing metal nanoparticles (NPs) also promise to strongly enhance the MO response of these materials. [15][16][17][18][19][20] A different type of the MO enhancement attributed to the phenomenon of extraordinary optical transmittance was observed in systems with magnetic metallic gratings 21,22 and perforated periodic structures. [23][24][25] In this paper, we propose another approach to resonance MO enhancement.…”

Section: Introductionmentioning

confidence: 99%

Magneto-optics enhancement with gain-assisted plasmonic subdiffraction chains

2015

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We study the enhancement of the magneto-optical effect in subdiffraction plasmonic chains. We show that in a periodic chain of the plasmonic nanoparticles embedded in a magneto-optical medium, propagation of a guided mode is accompanied by rotation of electrical dipoles (the Faraday effect). The angle of rotation per 1 μm is two orders of magnitude greater than that in the same bulk magneto-optical medium. We also demonstrate that the effect of Ohmic losses can be significantly reduced by using a gain-assisted chain composed of active core-shell nanoparticles (spasers). The dipole mode in such an array of magneto-optical spasers exhibits high values of the Faraday rotation and propagation length.

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Large enhancement of Faraday rotation by localized surface plasmon resonance in Au nanoparticles embedded in Bi:YIG film

Cited by 89 publications

References 11 publications

Magneto-optical plasmonic Bi:YIG composite films with Ag and Au-Ag alloy particles

Magneto-optical plasmonic Bi:YIG composite films with Ag and Au-Ag alloy particles

Nonreciprocal plasmonics enables giant enhancement of thin-film Faraday rotation

Magneto-optics enhancement with gain-assisted plasmonic subdiffraction chains

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