Experimental studies of cobalt ferrite nanoparticles doped silica matrix 3D magneto-photonic crystals

Diwan, E. Abou; Kékesi, Renáta; Jamon, Damien; Blanc-Mignon, M.-F.; Neveu, Sophie; Rousseau, Jean Jacques

doi:10.1117/12.2016676

Cited by 2 publications

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“…After preparing the samples, the Faraday rotation cycle was measured using a spectral polarimeter in LT2C laboratory [9],to inspect the orientation of the nanoparticles. When a linearly polarized light wave passes through the sample in the presence of a magnetic field parallel to the propagation of the light, the formers' linear polarization state will convert into an elliptical one and will be characterized by two angles; the Faraday rotation (θ F )and the Faraday ellipticity (ε F ) [9] as can be seen in figure 6.…”

Section: Resultsmentioning

confidence: 99%

“…When a linearly polarized light wave passes through the sample in the presence of a magnetic field parallel to the propagation of the light, the formers' linear polarization state will convert into an elliptical one and will be characterized by two angles; the Faraday rotation (θ F )and the Faraday ellipticity (ε F ) [9] as can be seen in figure 6. The Faraday rotation was presented as function of the applied magnetic field during the measurement at a specific wavelength chosen according to less noise factor and more signal intensity of the Faraday rotation and ellipticity cycles.…”

Section: Resultsmentioning

confidence: 99%

“…The TEOS solution is prepared by mixing the Tetraethyl orthosilicate (TEOS) with Ethanol (98% alcohol concentration) and HCL (0.1mol/L) [9]. The proportions of each ingredient depend on their number of mole as is shown in the equation 4 [9]; (4) Where m TEOS , m EtOH , m H2O and m HCL are respectively the number of mole of TEOS, EtOH, H 2 O and HCl.…”

Section: 12teos Preparationmentioning

confidence: 99%

“…The proportions of each ingredient depend on their number of mole as is shown in the equation 4 [9]; (4) Where m TEOS , m EtOH , m H2O and m HCL are respectively the number of mole of TEOS, EtOH, H 2 O and HCl. The TEOS final solution was prepared using 61.5% tetraethyl orthosilicate mixed with 28.5% ethanol.…”

Section: 12teos Preparationmentioning

confidence: 99%

“…The Faraday rotation was measured on a spectral polarimeter at LT2C laboratories [9] and consists of a light source, a polarizer, electromagnets, an analyzer and a light detector figure 5. The sample is to be placed within the electromagnet poles.…”

Section: Measurement Benchmentioning

confidence: 99%

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Self-oriented CoFe₂O₄composites for non-reciprocal microwave components

Tchangoulian¹,

Diwan²,

Vincent³

et al. 2014

EPJ Web of Conferences

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Abstract.In telecommunication systems, heavy bulky magnets are used to establish the proper functioning of a circulator by ensuring the uniform orientation of the ferrite material's magnetic moment. Thus to develop an unbiased coplanar microwave circulator, the approach based on "ferromagnetic nanowired composite substrates" was promising. The idea was to do a magnetophoretic deposition of nanocoloidal cobalt ferrite nanoparticles into porous alumina membranes and permanently orient them uniformly. Therefore, in order to check the orientation possibility of the nanoparticle, samples of magnetic thin films on glass substrates were synthetized from CoFe 2 O 4 nanoparticles dispersed in a silica sol-gel matrix using the dip-coating technique with and without a uniformly applied magnetic field. To investigate the magnetic behavior of the prepared samples, the Faraday rotation as a function of the applied magnetic field was measured using a spectral polarimeter. The unambiguous qualitative difference between the Faraday rotation hysteresis loops shows a large variation of coercive (μ 0 H c ) and remanent field ( ) values, thus proving the orientation of the nanoparticles. Such nanocomposite is a promising candidate for future miniature microwave circulators fabrication.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: 12teos Preparationmentioning

confidence: 99%

Section: 12teos Preparationmentioning

confidence: 99%

Section: Measurement Benchmentioning

confidence: 99%

See 3 more Smart Citations

Self-oriented CoFe₂O₄composites for non-reciprocal microwave components

Tchangoulian¹,

Diwan²,

Vincent³

et al. 2014

EPJ Web of Conferences

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Deep‐UV Lithography of Nanocomposite Thin Films into Magnetooptical Gratings with Submicron Periodicity

et al. 2020

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Incompatibility of conventional magneto-optical (MO) materials with photonicsystem fabrication processes constitutes a major technological roadblock limiting their integration into photonic devices, especially for micro-or nano-patterned films. This paper proposes a photolithography approach toward MO micro-and nano-patterns, based on hybrid photosensitive matrices doped with magnetic nanoparticles to concentrations as high as 20%vol. The as prepared and characterized nanocomposite thin films exhibit excellent MO properties: a high Faraday rotation (5300 °/cm), comparable with the best existing materials that nevertheless require much more involved processes. The photosensitive matrices allow patterned gratings with a wide range of periods (100 µm to 500 nm), using a simple procedure at room temperature. The fabricated gratings exhibit welldefined regular structures and resolutions suitable for optical applications, including those at telecommunications wavelengths. Finally, direct applications of the proposed material and its associated process are demonstrated on two examples: 1) a magneto-optical grating in free-space and 2) in combination with a waveguide. The obtained optical and MO results are consistent with simulations.

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Experimental studies of cobalt ferrite nanoparticles doped silica matrix 3D magneto-photonic crystals

Cited by 2 publications

References 0 publications

Self-oriented CoFe₂O₄composites for non-reciprocal microwave components

Self-oriented CoFe₂O₄composites for non-reciprocal microwave components

Deep‐UV Lithography of Nanocomposite Thin Films into Magnetooptical Gratings with Submicron Periodicity

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Experimental studies of cobalt ferrite nanoparticles doped silica matrix 3D magneto-photonic crystals

Cited by 2 publications

References 0 publications

Self-oriented CoFe2O4composites for non-reciprocal microwave components

Self-oriented CoFe2O4composites for non-reciprocal microwave components

Deep‐UV Lithography of Nanocomposite Thin Films into Magnetooptical Gratings with Submicron Periodicity

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Product

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Self-oriented CoFe₂O₄composites for non-reciprocal microwave components

Self-oriented CoFe₂O₄composites for non-reciprocal microwave components