3D magneto-photonic crystal made with cobalt ferrite nanoparticles silica composite structured as inverse opal

Kékesi, Renáta; Royer, F.; Jamon, Damien; Mignon, M. F. Blanc; Diwan, E. Abou; Chatelon, Jean-Pierre; Neveu, Sophie; Tombácz, Etelka

doi:10.1364/ome.3.000935

Cited by 22 publications

(5 citation statements)

References 26 publications

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“…It corresponds to an NP volume fraction of 15% in the matrix. Based on these results, the 1D Si 3 N 4 grating template has been impregnated with a sol–gel solution containing a suitable quantity of CoFe 2 O 4 NPs previously crystallized during a co-precipitation process in water . The device is finally submitted to soft thermal annealing at 100 °C, leading to a MO refractive index of 1.69 (see Methods).…”

Section: Results and Discussionmentioning

confidence: 99%

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

et al. 2020

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We report on the design, fabrication, and characterization of an all-dielectric one-dimensional (1D) resonant device formed by a silicon nitride grating impregnated by a low-index magneto-optical silica-type matrix. This impregnation is realized through the dipping of the 966 nm periodic template in a sol−gel solution previously doped with CoFe 2 O 4 nanoparticles, and able to fill the grating slits. By a proper adjustment of the geometrical parameters of such a photonic crystal membrane, simultaneous excitation of transverse electric (TE) and transverse magnetic (TM) polarization resonances is nearly achieved at 1570 nm. This TE/TM phase-matching situation leads to a fivefold enhancement of the Faraday effect in the resonance area with an increased merit factor of 0.32°. Moreover, the device demonstrates its ability to enhance longitudinal and transverse Kerr effects for the other directions of the applied magnetic field. Taking benefits from the ability of the nanocomposite material to be processed on photonic platforms, and despite its quite low magneto-optical activity compared to classical magnetic materials, this work proves that an alldielectric 1D device can produce a high magneto-optical sensitivity to every magnetic field directions.

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Section: Results and Discussionmentioning

confidence: 99%

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

et al. 2020

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“…Typically, dialysis of 20 mL of ferrofluid initially concentrated at 1.45 vol% for 24 h with agitation results in a highly viscous ferrofluid with an MNPs concentration of about 10 vol% (corresponding to a concentration of a factor of ~ 7). By introducing dialyzed ferrofluids into a matrix, it has been possible to achieve doping levels of up to 20 vol%, which is comparable to the highest level of MNPs in nanocomposites described in the literature 44 . The advantage of using a dialyzed ferrofluid is to introduce more magnetic nanoparticles without adding more water to the mixture.…”

Section: Methodsmentioning

confidence: 80%

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

Clémentine

Berling

Jamon

et al. 2021

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This paper is aimed at investigating the process of photocrosslinking under Deep-UV irradiation of nanocomposite thin films doped with cobalt ferrite magnetic nanoparticles (MNPs). This material is composed of a hybrid sol–gel matrix in which MNP can be introduced with high concentrations up to 20 vol%. Deep-UV (193 nm) is not only interesting for high-resolution patterning but we also show an efficient photopolymerization pathway even in the presence of high concentration of MNPs. In this study, we demonstrate that the photocrosslinking is based on the free radical polymerization of the methacrylate functions of the hybrid precursor. This process is initiated by Titanium-oxo clusters. The impact of the nanoparticles on the photopolymerization kinetic and photopatterning is investigated. We finally show that the photosensitive nanocomposite is suitable to obtain micropatterns with sub-micron resolution, with a simple and versatile process, which opens many opportunities for fabrication of miniaturized magneto-optical devices for photonic applications.

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“…It is made by circular air holes of r = 0.27 µm, arranged in a triangular lattice of period a = 0.75 µm and embedded in SiO 2 /ZrO 2 matrix. The matrix has a permittivity ε = 2.2801 and the magnitude of the o-diagonal elements of ε mo = 0, corresponding to the SiO 2 /ZrO 2 at optical communication wavelength λ 0 = 1550 nm [19,20]. Figure 2, shows the band diagrams of non-magnetic structure of 2D photonic crystal (with ε mo = 0) for TE (blue) and TM (red) modes of the polarization.…”

Section: Dispersion Diagram Of 2d Photonic Crystalmentioning

confidence: 99%

Mode Conversion in 2D Magneto Photonic Crystals Made of SiO₂/ZrO₂Matrix Doped With Magnetic Nanoparticles

2015

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In this work, we theoretically study the use of magneto-photonic crystal for amplication of the magnetooptical eects, to improve the merit factor. A two dimensional magneto-photonic waveguide device, formed by a triangular lattice of air holes, embedded in SiO2/ZrO2 matrix doped with magnetic nanoparticles, is used to study the inuence of the volume fraction (VF %) on the mode conversion. We have used the beam propagation method (BPM) to simulate the eciency coecient in a planar 2D magneto-photonic waveguide. The inuence of VF % on propagation length is studied, and an enhancement in Faraday rotation in 2D magneto photonic crystal is achieved, which proves the ability of the structure to produce magneto-photonic crystal isolator.

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3D magneto-photonic crystal made with cobalt ferrite nanoparticles silica composite structured as inverse opal

Cited by 22 publications

References 26 publications

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

Mode Conversion in 2D Magneto Photonic Crystals Made of SiO₂/ZrO₂Matrix Doped With Magnetic Nanoparticles

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3D magneto-photonic crystal made with cobalt ferrite nanoparticles silica composite structured as inverse opal

Cited by 22 publications

References 26 publications

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

Enhancement of Both Faraday and Kerr Effects with an All-Dielectric Grating Based on a Magneto-Optical Nanocomposite Material

Photocrosslinking and photopatterning of magneto-optical nanocomposite sol–gel thin film under deep-UV irradiation

Mode Conversion in 2D Magneto Photonic Crystals Made of SiO2/ZrO2Matrix Doped With Magnetic Nanoparticles

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Mode Conversion in 2D Magneto Photonic Crystals Made of SiO₂/ZrO₂Matrix Doped With Magnetic Nanoparticles