Epitaxial Bi–Gd–Sc iron-garnet films for magnetophotonic applications

Prokopov, A. R.; Vetoshko, P. M.; Shumilov, A. G.; Shaposhnikov, A. N.; Kuzmichev, A. N.; Koshlyakova, Natalia N.; Berzhansky, V. N.; Zvezdin, A. K.; Belotelov, V. I.

doi:10.1016/j.jallcom.2016.02.036

Cited by 54 publications

(24 citation statements)

References 35 publications

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“…The most pronounced enhancement of the MO effects takes place for highquality resonances that are achieved if the ferromagnetic metal is substituted by a low absorptive noble one and the dielectric layer is magnetized. Probably, the best candidates for magnetic dielectric are bismuth rare-earth iron garnet films of composition BixR3-xFe5O12, where R is a rare-earth element [84]. Therefore, we will consider main properties of MPCs taking this kind of structures as exemples and study their properties in detail.…”

Section: B Magnetoplasmonic Crystalsmentioning

confidence: 99%

Nanoscale magnetophotonics

Maccaferri

Zubritskaya

Razdolski

et al. 2020

Journal of Applied Physics

125

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This Perspective surveys the state-of-the-art and future prospects of science and technology employing the nanoconfined light (nanophotonics and nanoplasmonics) in combination with magnetism. We denote this field broadly as nanoscale magnetophotonics. We include a general introduction to the field and describe the emerging magneto-optical effects in magnetoplasmonic and magnetophotonic nanostructures supporting localized and propagating plasmons. Special attention is given to magnetoplasmonic crystals with transverse magnetization and the associated nanophotonic non-reciprocal effects, and to magneto-optical effects in periodic arrays of nanostructures. We give also an overview of the applications of these systems in biological and chemical sensing, as well as in light polarization and phase control. We further review the area of nonlinear magnetophotonics, the semiconductor spin-plasmonics, and the general principles and applications of opto-magnetism and nano-optical ultrafast control of magnetism and spintronics.

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Section: B Magnetoplasmonic Crystalsmentioning

confidence: 99%

Nanoscale magnetophotonics

Maccaferri

Zubritskaya

Razdolski

et al. 2020

Journal of Applied Physics

125

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“…The need for on-chip isolator integration for the manufacturing of optical circuits, especially for telecommunication purposes, has led to extensive research on and prototyping of these devices over the years [11][12][13][14][15]. Smart (or engineered/designed) magnetophotonic crystal and magnetoplasmonic structures incorporating bismuth-substituted iron-garnet films were demonstrated [16][17][18][19]. However, better and stronger non-reciprocal efficiency than at present is still needed by industry to further miniaturize these systems down to nanometer size.…”

mentioning

confidence: 99%

Faraday rotation in iron garnet films beyond elemental substitutions

Levy¹,

Borovkova²,

Sheidler³

et al. 2019

Optica

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In previous decades significant efforts have been devoted to increasing the magneto-optical efficiency of iron garnet materials for the miniaturization of nonreciprocal devices such as isolators and circulators. Elemental substitutions or proper nano-structuring to benefit from optical resonances have been pursued. However, all these approaches still require film thicknesses of at least several tens of microns to deliver useful device applications, and suffer from narrow bandwidths in the case of optical resonance effects. This Letter reports on a newly discovered enhancement of the Faraday Effect observed experimentally in nanoscale bismuth-substituted iron garnet films. It is shown here that this enhancement is not due to elemental substitution or compositional variations. Nor is it due to photon trapping or resonance effects. Comprehensive experimental and theoretical analysis of the Faraday rotation reveals a dramatic seven-fold amplification in the magneto-optic gyrotropy within only 2 nm of the air-surface interface, corresponding to just a couple of atomic monolayers as a result of symmetry-breaking at the airfilm interface. This finding opens up an avenue to the application of monolayer magnetic garnets for the control of light.Rare-earth iron garnet films are technologically important since they are among the main materials used in magneto-photonics, ultrafast magnetism and spintronics [1,2]. In particular, they are used extensively in optical circuits for the fabrication of nonreciprocal optical devices. Isolators and circulators, operating as optical filters rely on the non-reciprocal functionality of iron garnets to protect laser sources from reflected downstream light that might otherwise enter the cavity and destabilize the signal [2-4].Magneto-optical light modulators and magnetic sensors utilize iron garnet films for efficient magneto-optical response and outstanding performance [3][4][5]. On the other hand, iron garnet thin

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“…Sample 1 was an array of gold nanocylinders placed on a 500 nm‐thick iron garnet film with a composition Bi 1.4 Y 1.6 Al 1.55 Sc 0.2 Fe 3.25 O 12 (BiIG‐a) and covered by 100 nm of sapphire (Figure a). BiIG‐a was fabricated by liquid phase epitaxy . Sample 2 was an array of gold nanocylinders placed on a 30 nm‐thick iron garnet film (BiIG‐b) with the composition Bi 3 Fe 5 O 12 and covered by another 90 nm‐thick iron garnet film (BiIG‐c) composed of Bi 2.8 Y 0.2 Fe 5 O 12 (Figure b).…”

Section: Methodsmentioning

confidence: 99%

“…BiIG-a was fabricated by liquid phase epitaxy. [24] Sample 2 was an array of gold nanocylinders placed on a 30 nm-thick iron garnet film (BiIG-b) with the composition Bi 3 Fe 5 O 12 and covered by another 90 nm-thick iron garnet film (BiIG-c) composed of Bi 2.8 Y 0.2 Fe 5 O 12 (Figure 1b). The bottom iron garnet film was fabricated by pulsed laser deposition on the gadolinium gallium garnet (GGG) substrate, whereas the top one was grown by reactive magnetron sputtering.…”

Section: Methodsmentioning

confidence: 99%

Influence of the Plasmonic Nanodisk Positions Inside a Magnetic Medium on the Faraday Effect Enhancement

Kuzmichev

Sylgacheva

Kozhaev

et al. 2020

Physica Rapid Research Ltrs

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Light localization by metal particles of nanometer size allows to not only control the propagation of light, but also enhance magneto‐optical effects. The influence of the immersion of gold nanodisks inside a transparent magnetic medium, namely, Bi‐substituted iron garnet, is investigated, and the optimal position of the nanoparticles within the magnetic material for a strong enhancement of the effect is unraveled. Three samples with periodic arrays of Au cylinders are studied: disks on the surface of the magnetic dielectric film, inside the magnetic film, and directly under the magnetic film. The largest enhancement of the Faraday effect mediated by a localized surface plasmon resonance takes place when nanodisks are submerged inside the magnetic film at a few nanometers below its upper surface. It is shown that the most prominent influence on the Faraday effect enhancement is provided by the magnetic medium between the nanodisks. The experimental results are in good agreement with the numerical analysis.

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Epitaxial Bi–Gd–Sc iron-garnet films for magnetophotonic applications

Cited by 54 publications

References 35 publications

Nanoscale magnetophotonics

Nanoscale magnetophotonics

Faraday rotation in iron garnet films beyond elemental substitutions

Influence of the Plasmonic Nanodisk Positions Inside a Magnetic Medium on the Faraday Effect Enhancement

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