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1.


    Gardymova, A. P.
    Multistability in polymer-dispersed cholesteric liquid crystal film doped with ionic surfactant / A. P. Gardymova, V. Y. Zyryanov, V. A. Loiko // Tech. Phys. Lett. - 2011. - Vol. 37, Is. 9. - P. 805-808, DOI 10.1134/S1063785011090094. - Cited References: 12. - This study was supported in part by the Federal Targeted Program "Scientific and Pedagogical Personnel for Innovative Russia" (project no. P901) and the Siberian Branch of the Russian Academy of Sciences (project nos. 110 and 144). . - ISSN 1063-7850
РУБ Physics, Applied
Рубрики:
REFLECTIVE DISPLAYS
Аннотация: A memory effect has been discovered in composite films based on a polymer containing dispersed cholesteric liquid crystal, which is related to the modification of the surface anchoring by an ionic surfactant under the action of an applied electric field. Parameters of electric signals are selected that ensure the switching of the composite film between some stable states with different levels of optical transmittance.

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Держатели документа:
[Gardymova, A. P.] Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia
Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, Byelarus
ИФ СО РАН
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk 220072, Belarus

Доп.точки доступа:
Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Loiko, V. A.
}
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2.


   
    Electro- and magneto-optical switching of defect modes in one- dimensional photonic crystals / V. G. Arkhipkin [et al.] // J. Exp. Theor. Phys. - 2011. - Vol. 112, Is. 4. - P. 577-587, DOI 10.1134/S1063776111040017. - Cited References: 35. - We thank A. M. Parshin for help with the magneto-optical measurements. This work was supported by grant no. NSC98-2923-M-033-001-MY3; nos. 27.1 and 9.1 RAS; nos. 5 and 144 SB RAS; State contract no. 02.740.11.0220 ("Scientific and Scientific-Pedagogical Personnel of Innovational Russia" Federal Goal-Oriented Program). . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
NEMATIC LIQUID-CRYSTALS
Кл.слова (ненормированные):
Crossed polarizers -- Defect mode -- Experimental data -- Magnetic field strengths -- Magneto-optical -- Polarized light waves -- Transmission spectrums -- Defects -- Light transmission -- Magnetic fields -- Magnetos -- Optical switches -- Photonic crystals
Аннотация: The transmission spectra of polarized light waves in a photonic crystal/liquid crystal (PC/LC) cell placed between crossed polarizers and controlled by an electric or magnetic field have been studied experimentally and theoretically. Electro- and magneto-optical switching based on the interference of polarized defect modes has been demonstrated. The transmission spectra of the PC/LC cell have been calculated as a function of the voltage applied to the LC layer and the magnetic field strength. The results of the calculations agree well with the experimental data.

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Держатели документа:
[Arkhipkin, V. G.
Gunyakov, V. A.
Myslivets, S. A.
Zyryanov, V. Ya.
Shabanov, V. F.] Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
[Arkhipkin, V. G.
Gunyakov, V. A.
Myslivets, S. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Zyryanov, V. Ya.
Shabanov, V. F.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
[Lee, Wei] Chung Yuan Chistian Univ, Ctr Nanotechnol, Chungli 32023, Taiwan
[Lee, Wei] Chung Yuan Chistian Univ, Dept Phys, Chungli 32023, Taiwan
ИФ СО РАН
Krasnoyarsk Scientific Center, Kirensky Institute of Physics, Russian Academy of Science, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation
Department of Physics, Center for Nanotechnology, Chung Yuan Chistian University, Chung-Li, 32023, China

Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович; Lee, W.
}
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3.


    Krakhalev, M. N.
    Electro-Optical Characteristics of Polymer-Dispersed Liquid Crystal Film Controlled by Ionic-Surfactant Method / M. N. Krakhalev, V. A. Loiko, V. Y. Zyryanov // Tech. Phys. Lett. - 2011. - Vol. 37, Is. 1. - P. 34-36, DOI 10.1134/S1063785011010056. - Cited References: 5. - This study was supported in part by Russian Federal Agencies (project nos. P901 and 02.740.11.0220), the Russian Foundation for Basic Research (project no. 08-03-01007), and the Siberian Branch of the Russian Academy of Sciences (project nos. 27.1, 110, and 144). . - ISSN 1063-7850
РУБ Physics, Applied

Аннотация: The electro-optical characteristics of a composite film based on a polymer containing dispersed nematic liquid crystal (NLC) doped with an ionic surfactant have been studied. The threshold character of the reorientation of NLC droplets as well as the dependence of the modulation amplitude of light transmission on the electric field strength has been revealed for the effect of ionic modification of surface anchoring. The dynamical parameters of the optical response have been determined.

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Держатели документа:
[Krakhalev, M. N.] Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Reshetnev Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, Byelarus
ИФ СО РАН
Kirensky Institute of Physics, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State Aerospace University, Krasnoyarsk, 660014, Russian Federation
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, 220072, Belarus

Доп.точки доступа:
Loiko, V. A.; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Крахалев, Михаил Николаевич
}
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4.


   
    Magnetic-field control of the transmission of a photonic crystal with a liquid-crystal defect / V. A. Gunyakov [et al.] // Tech. Phys. - 2010. - Vol. 55, Is. 10. - P. 1484-1489, DOI 10.1134/S1063784210100142. - Cited References: 16. - This study was supported by the Russian Academy of Sciences (grant nos. NSh-3818.2008.3, RNP.2.1.1.3455, 27.1, and 9.1), Siberian Branch, Russian Academy of Sciences (grant nos. 5 and 144), State contract no. 02. 740.11.0220, and the Federal program "Scientific Manpower and Pedagogical Staff of Innovative Russia." . - ISSN 1063-7842
РУБ Physics, Applied
Рубрики:
ORIENTATION
   LAYER

Аннотация: The method of modulation of transmittance of a multilayer photonic crystal with a nematic liquid-crystal defect upon the orientational transition from the homeotropic to the planar state is investigated. The orientation of the director of the nematic is controlled by a magnetic field in the B-effect mode. The method of recurrent relations is used for numerical simulation of transmission spectra of the photonic crystal structure under investigation.

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Держатели документа:
[Gunyakov, V. A.
Myslivets, S. A.
Parshin, A. M.
Zyryanov, V. Ya.
Arkhipkin, V. G.
Shabanov, V. F.] Russian Acad Sci, Krasnoyarsk Res Ctr, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Gunyakov, V. A.
Myslivets, S. A.
Parshin, A. M.
Zyryanov, V. Ya.
Arkhipkin, V. G.
Shabanov, V. F.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Zyryanov, V. Ya.
Shabanov, V. F.] Siberian State Aerosp Univ, Krasnoyarsk 660014, Russia
ИФ СО РАН
КНЦ СО РАН
Kirenskii Institute of Physics, Krasnoyarsk Research Center, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation
Siberian State Aerospace University, Krasnoyarsk 660014, Russian Federation

Доп.точки доступа:
Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Parshin, A. M.; Паршин, Александр Михайлович; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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5.


   
    Small-Angle Light Scattering from Polymer-Dispersed Liquid-Crystal Films / V. A. Loiko [et al.] // J. Exp. Theor. Phys. - 2008. - Vol. 107, Is. 4. - P. 692-698, DOI 10.1134/S1063776108100178. - Cited References: 20 . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
NEMATIC DROPLETS
Кл.слова (ненормированные):
ABS resins -- Angular distribution -- Drop formation -- Drops -- Light -- Light scattering -- Phase transitions -- Plastic films -- Polymer films -- Polymers -- Polynomial approximation -- Powders -- Angle light scatterings -- Anomalous diffractions -- Crystal films -- Cylindrical symmetries -- Droplet sizes -- Induced phase transitions -- Optical wavelengths -- PDLC films -- Scattered lights -- Scattering approximations -- Single layers -- Liquid crystal polymers
Аннотация: A method is developed for modeling and computing the angular distribution of light scattered forward from a single-layer polymer-dispersed liquid-crystal (PDLC) film. The method is based on effective-medium approximation, anomalous diffraction approximation, and far-field single-scattering approximation. The angular distribution of forward-scattered light is analyzed for PDLC films with droplet size larger than the optical wavelength. The method can be used to study field- and temperature-induced phase transitions in LC droplets with cylindrical symmetry by measuring polarized scattered light intensity.

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Держатели документа:
[Loiko, V. A.
Konkolovich, A. V.
Misckevich, A. A.] Natl Acad Sci Belarus, BI Stepanov Phys Inst, Minsk 220072, Byelarus
[Maschke, U.] Univ Sci & Technol Lille, Lab Chim Macromol, F-59655 Villeneuve Dascq, France
[Zyryanov, V. Ya.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk 220072, Belarus
Laboratoire de Chimie Macromoleculaire, Universite des Sciences et Technologies de Lille, Villeneuve d'Ascq Cedex F-59655, France
Kirenskii Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Loiko, V. A.; Maschke, U.; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Konkolovich, A. V.; Misckevich, A. A.
}
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6.


   
    Magnetic-field-assisted formation of alignment polymer coatings in liquid crystal cells / A. M. Parshin [et al.] // Tech. Phys. Lett. - 2008. - Vol. 34, Is. 7. - P. 571-573, DOI 10.1134/S1063785008070109. - Cited References: 8 . - ISSN 1063-7850
РУБ Physics, Applied
Рубрики:
FRANK CONSTANTS
Аннотация: We describe a new method for obtaining liquid crystal (LC) layers with planar orientation in plane-parallel cells, which is based on the technology of LC-polymer interface formation in solution under the action of an applied magnetic field. The azimuthal anchoring energy of LC at the polymer surface has been determined by measuring the angle of orientation of the nematic LC director on the substrate surface as a function of the magnetic field. The LC orientation provided by the proposed method is stable, and the anisotropy of LC anchoring is comparable with that achieved using well-known methods of alignment polymer film preparation by rubbing.

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Держатели документа:
[Parshin, A. M.] Russian Acad Sci, LV Kirensky Phys Inst, Krasnoyarsk Sci Ctr, Siberian Branch, Krasnoyarsk, Russia
Siberian Fed Univ, Krasnoyarsk, Russia
ИФ СО РАН

Доп.точки доступа:
Parshin, A. M.; Паршин, Александр Михайлович; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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7.


   
    One-dimensional photonic crystals with a planar oriented nematic layer: Temperature and angular dependence of the spectra of defect modes / V. G. Arkhipkin [et al.] // J. Exp. Theor. Phys. - 2008. - Vol. 106, Is. 2. - P. 388-398, DOI 10.1134/S1063776108020179. - Cited References: 58 . - ISSN 1063-7761
РУБ Physics, Multidisciplinary
Рубрики:
LIQUID-CRYSTAL
   TRANSMISSION SPECTRUM

   BANDGAP STRUCTURES

   PERIODIC STRUCTURE

   REFRACTIVE-INDEX

   LATTICE-DEFECTS

   LASER

   ENHANCEMENT

   SILICON

   MICROCAVITIES

Аннотация: Transmission spectra of a one-dimensional photonic crystal (PC) formed by two multilayer dielectric mirrors and a planar oriented layer of 5CB nematic liquid crystal (LC) that is sandwiched between these mirrors and serves as a structure defect are investigated experimentally. Specific features of the behavior of the spectrum of defect modes as a function of the angle of incidence of light on the crystal are studied for two polarizations: parallel and perpendicular to the director of the LC; the director either lies in the plane of incidence or is perpendicular to it. It is shown that, for the configurations considered, the maxima of the defect modes shift toward the short-wavelength region as the tilt angle of incidence radiation increases; this tendency is more manifest for the parallel-polarized component, when the director lies in the plane of incidence. In the latter case, the width of the photonic band gap (PBG) appreciably decreases. The temperature dependence of the polarization components of the transmission spectra of a PC is investigated in the case of normal incidence of light. The spectral shift of defect modes due to the variation of the refractive index of the LC at the nematic-isotropic liquid phase transition point is measured. It is shown that, in real PCs, the amplitude of defect modes decreases when approaching the center of the band gap, as well as when the number of layers in the dielectric mirrors increases. Theoretical transmission spectra of the PCs calculated by the method of recurrence relations with regard to the decay of defect modes are in good agreement with experimental data.

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Держатели документа:
[Arkhipkin, V. G.
Gunyakov, V. A.
Myslivets, S. A.
Gerasimov, V. P.
Zyryanov, V. Ya.
Vetrov, S. Ya.
Shabanov, V. F.] Russian Acad Sci, Siberian Branch, Kirenskii Inst Phys, Krasnoyarsk 660036, Russia
ИФ СО РАН

Доп.точки доступа:
Arkhipkin, V. G.; Архипкин, Василий Григорьевич; Gunyakov, V. A.; Гуняков, Владимир Алексеевич; Myslivets, S. A.; Мысливец, Сергей Александрович; Gerasimov, V. P.; Герасимов, Виктор Петрович; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Vetrov, S. Y.; Shabanov, V. F.; Шабанов, Василий Филиппович
}
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8.


   
    Orientational structure transformations caused by the electric-field-induced ionic modification of the interface in nematic droplets / V. Y. Zyryanov [et al.] // JETP Letters. - 2007. - Vol. 86, Is. 6. - P. 383-388, DOI 10.1134/S0021364007180087. - Cited References: 18 . - ISSN 0021-3640
РУБ Physics, Multidisciplinary
Рубрики:
LIQUID
   TRANSITIONS

   FILMS

Аннотация: The films of a polymer-dispersed nematic liquid crystal doped with an ionic surfactant were studied. The surface-anchoring modification effect caused by the local increase in the concentration of surface-active ions was observed at the polymer-liquid crystal interface under the action of an electric field. The modification of the boundary conditions leads to the transformation of the orientational structure of the nematic droplets and, as a result, to an appreciable change in their texture patterns and light-scattering efficiency at the interfaces. The monopolar director configurations (normal and curved) arising in the process of orientational structure transformations are considered and their typical textures are demonstrated. The possibility that the monopolar structure can be formed is theoretically substantiated by the computer simulation of the director field in a nematic droplet with the boundary conditions corresponding to the experiment.

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Держатели документа:
Russian Acad Sci, Krasnoyarsk Sci Ctr, Siberian Branch, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Krasnoyarsk 660041, Russia
ИФ СО РАН
Krasnoyarsk Scientific Center, Kirensky Institute of Physics, Russian Academy of Sciences, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, Krasnoyarsk 660041, Russian Federation

Доп.точки доступа:
Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Krakhalev, M. N.; Крахалев, Михаил Николаевич; Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич
}
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9.


   
    Friedericksz threshold field in bipolar nematic droplets with strong surface anchoring / O. O. Prishchepa [et al.] // JETP Letters. - 2007. - Vol. 84, Is. 11. - P. 607-612, DOI 10.1134/S0021364006230081. - Cited References: 11 . - ISSN 0021-3640
РУБ Physics, Multidisciplinary
Рубрики:
FRANK CONSTANTS
Кл.слова (ненормированные):
61.30.-v
Аннотация: A numerical method has been developed for calculating the director configuration in ellipsoidal droplets of a nematic liquid crystal with strong tangential anchoring in a uniform magnetic field of an arbitrary orientation. A relation has been obtained for determining the Friedericksz threshold corresponding to the beginning of the reorientation of the central region of a droplet when the field is orthogonal to the biopolar axis. The effect of the breaking of the orthogonal condition on the threshold character of the orientation process is considered. The reorientation of the ensemble of bipolar droplets of the 5CB nematic liquid crystal dispersed in polyvinyl butyral has been studied by the magneto-optical method. Comparative analysis of calculation data and measured values of the threshold field has been performed.

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademogorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Prishchepa, O. O.; Прищепа, Оксана Олеговна; Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Parshin, A. M.; Паршин, Александр Михайлович; Nazarov, V. G.
}
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10.


    Prishchepa, O. O.
    Director configurations in nematic droplets with inhomogeneous boundary conditions / O. O. Prishchepa, A. V. Shabanov, V. Y. Zyryanov // Phys. Rev. E. - 2005. - Vol. 72, Is. 3. - Ст. 31712, DOI 10.1103/PhysRevE.72.031712. - Cited References: 22 . - ISSN 1539-3755
РУБ Physics, Fluids & Plasmas + Physics, Mathematical
Рубрики:
DISPERSED LIQUID-CRYSTALS
   TRANSITION

Кл.слова (ненормированные):
Lecithin contents -- Nematic droplets -- Polarizers -- Radial structures -- Approximation theory -- Boundary conditions -- Drop breakup -- Free energy -- Polarization -- Textures -- Nematic liquid crystals
Аннотация: The nematic droplets with director configurations intermediate between the bipolar and radial structures have been investigated experimentally and theoretically. The liquid crystal 4(')-n-pentyl-4-cyanobiphenyl (5CB) with a variable addition of the lecithin dispersed in polyvinylbutyral has been used. The characteristic textures of the droplets formed at various lecithin contents have been examined using polarizing microscope both in the crossed polarizers and without analyzer. The computer simulation has been performed for proper ordering of the director in spherical nematic droplets by minimizing the free energy in the one-constant approximation. The inhomogeneous boundary conditions with strong anchoring of the molecules at the interface have been used. The distribution of the anchoring angle at the droplet surface has been estimated based on analysis of observed patterns. The simulated textures of the droplets under crossed polarizers are shown to compare well with the experimental ones.

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Держатели документа:
LV Kirenskii Inst Phys, Akademgorodok, Krasnoyarsk 660036, Russia
ИФ СО РАН
L.V. Kirensky Institute of Physics, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Shabanov, A. V.; Шабанов, Александр Васильевич; Zyryanov, V. Y.; Зырянов, Виктор Яковлевич; Прищепа, Оксана Олеговна
}
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