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RISS 인기검색어
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- 저자 : A. V. BARYSHEV (검색결과 4 건)
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Fabrication of Three-Dimensional Magnetophotonic Crystals: Opal Thin Films Filled with Bi:YIG
R. Fujikawa,A. V. Baryshev,H. Uchida,P. B. Lim,M. Inoue 한국자기학회 2006 Journal of Magnetics Vol.11 No.3
We have fabricated three-dimensional magnetophotonic crystals based on a-SiO₂ opal films. Opal thin films grown on glass substrates were filled with bismuth substituted iron garnet (Bi:YIG). Scanning electron microscopy data, optical and magnetic properties of the synthesized samples confirm the presence of the Bi:YIG content in the opal lattice. It is shown that the samples exhibit the (111) stop band, and transmissivity of the threedimensional magnetophotonic crystals is defined by both the film lattice and the Bi:YIG content.
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Frontiers in Magneto-optics of Magnetophotonic Crystals
M. Inoue,A. A. Fedyanin,A. V. Baryshev,A. B. Khanikaev,H. Uchida,A. B. Granovsky 한국자기학회 2006 Journal of Magnetics Vol.11 No.4
The recently published and new results on design and fabrication of magnetophotonic crystals of different dimensionality are surveyed. Coupling of polarized light to 3D photonic crystals based on synthetic opals was studied in the case of low dielectric contrast. Transmissivity of opals was demonstrated to strongly depend on the propagation direction of light and its polarization. It was shown that in a vicinity of the frequency of a single Bragg resonance in a 3D photonic crystal the incident linearly polarized light excites inside the crystal the TE- and TM-eigen modes which passing through the crystal is influenced by Bragg diffraction of electromagnetic field from different (hkl) sets of crystallographic planes. We also measured the Faraday effect of opals immersed in a magneto-optically active liquid. It was shown that the behavior of the Faraday rotation spectrum of the system of the opal sample and magneto-optically active liquid directly interrelates with transmittance anisotropy of the opal sample. The photonic band structure, transmittance and Faraday rotation of the light in three-dimensional magnetophotonic crystals of simple cubic and face centered cubic lattices formed from magneto-optically active spheres where studied by the layer Korringa-Kohn-Rostoker method. We found that a photonic band structure is most significantly altered by the magneto-optical activity of spheres for the high-symmetry directions where the degeneracies between TE and TM polarized modes for the corresponding non-magnetic photonic crystals exist. The significant enhancement of the Faraday rotation appears for these directions in the proximity of the band edges, because of the slowing down of the light. New approaches for one-dimensional magnetophotonic crystals fabrication optimized for the magneto-optical Faraday effect enhancement are proposed and realized. One-dimensional magnetophotonic crystals utilizing the second and the third photonic band gaps optimized for the Faraday effect enhancement have been successfully fabricated. Additionally, magnetophotonic crystals consist of a stack of ferrimagnetic Bi-substituted yttrium-iron garnet layers alternated with dielectric silicon oxide layers of the same optical thickness. High refractive index difference provides the strong spatial localization of the electromagnetic field with the wavelength corresponding to the long-wavelength edge of the photonic band gap.
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Mikhail Myagkov,Vitaliy V. Kashpur,Alexey A. Baryshev,Viacheslav L. Goiko,Evgeniy V. Shchekotin 한국외국어대학교(글로벌캠퍼스) 러시아연구소 2019 REGION Vol.8 No.1
The conservative shift taken by Russian authorities forced members of the Russian extreme right to seek shelter online. Nevertheless, they fell under censorship restrictions. The objective of this study is to reveal the distinguishing features of extreme right online groups and their participants' activity under conditions of censorship. The groups studied were identified by means of linguistic markers of extreme right sentiments and attitudes. The metrics of social network analysis were used to analyze interconnections between the groups and the internal migrations of closed communities. The study revealed that (1) extreme right online communities use the tactic of creating mirror Internet sites in case the main group is blocked; (2) blocking of the most extreme oppositional extreme right online groups induces the remaining ones to imitate obedience to law, using "softer forms" of extremist rhetoric; (3) the audience of the blocked groups continues spreading extremist ideas through channels related to other subjects. The study's authors conclude that prohibiting extreme right discourse promotes the proliferation of extreme right ideas and sentiments.
ScienceON
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