S. L. Smorgon
Russian Academy of Sciences
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Featured researches published by S. L. Smorgon.
Molecular Engineering | 1992
Victor Ya. Zyryanov; S. L. Smorgon; Vasili F. Shabanov
Elongated films of polymer dispersed liquid crystals have been experimentally investigated. The dependence of transmittance light polarization on elongation coefficient and temperature has been studied. The possibilities of practical applications of elongated films of polymer dispersed liquid crystals are discussed.
Liquid Crystals | 2001
V. Ya. Zyryanov; E. P. Pozhidaev; S. L. Smorgon; A. L. Andreev; D. Ganzke; V. F. Shabanov; Igor N. Kompanets; Wolfgang Haase
Features of the light passing through a single-polarizer electro-optical cell based on a uniaxially oriented film of a polymer dispersed ferroelectric liquid crystal have been studied. The optical response as a function of the applied electric field is shown to depend on the cell geometry. A detailed analysis is presented of the dependence of the maximum light transmission, modulation depth and contrast ratio on the angle between the light polarization and the film orientation direction, on its optical anisotropy and on the molecular tilt angle. An approximate formula is proposed to estimate the highest attainable contrast. Parameters under study have been measured for PDFLC films varying in optical anisotropy value. The experimental results prove to be in good agreement with theoretical estimations.
Ferroelectrics | 1993
V. Ya. Zyryanov; S. L. Smorgon; V. F. Shabanov
Abstract A new electrooptical material, planar-oriented films of polymer dispersed ferroelectric liquid crystals, has been investigated. Its polarizable, volt-amplitude and dynamic characteristics have been measured here.
Liquid Crystals | 2002
E. P. Pozhidaev; D. Ganzke; V. Ya. Zyryanov; S. L. Smorgon; Wolfgang Haase
A polymer film of polyvinylbutyral with dispersed droplets of a ferroelectric liquid crystalline mixture (FLC309c) has been prepared and characterized. The collective processes have been studied by dielectric relaxation spectroscopy in the frequency range 10 Hz to 13 MHz. In comparison with the FLC309c mixture, the polymer dispersed ferroelectric liquid crystal (PDFLC309c) based on FLC309c exhibits a Goldstone-like mode relaxation with a much higher relaxation frequency, but a smaller dielectric strength than the Goldstone mode observed for the FLC309c mixture. The spontaneous polarization of PDFLC309c decreases by nearly one order of magnitude in comparison with FLC309c, while the tilt angle decreases by 20%. Considering these results, we believe that a non-switching region exists near the polymer boundaries and that significant deformations of the helical structure occur due to stronger anchoring.
Ferroelectrics | 2000
V. Ya. Zyryanov; E. P. Pozhidaev; S. L. Smorgon; V. A. Barannik; V. V. Presnjakov; A. L. Andreev; Igor N. Kompanets; S. Shevtchenko; D. Ganzke; W. Haase
Abstract Typical textures of ferroelectric liquid crystal droplets dispersed in a thermoplastic matrix are presented. Uniaxially aligned droplets with wavy deformed smectic layers are effective light scattering polarizers, the direction of which can be reoriented by an applied electric field. We have studied theoretically and experimentally the dependencies of the light modulation characteristics of a single polarizer electrooptical cell based on a planar-oriented film of polymer dispersed ferroelectric liquid crystals both on the geometry of the cell and the material parameters.
Ferroelectrics | 2000
A. L. Andreev; Eugene P. Pozhidaev; I. N. Kompanets; T. B. Fedosenkova; V. Ya. Zyryanov; S. L. Smorgon; T. Weyrauch; Wolfgang Haase
Abstract The reduction of the elastic energy of Polymer Dispersed Ferroelectric Liquid Crystal (PDFLC) films results in a decreasing of the saturation voltage. The size and shape of the droplets determine the PDFLC electrooptical effect and the temperature dependence of the saturation voltage. PDFLC films with the saturation voltage of 7–9 V have been created.
Molecular Crystals and Liquid Crystals | 1998
V. V. Presnyakov; S. L. Smorgon; Victor Ya. Zyryanov; Vasily F. Shabanov
Abstract The structural and electrooptical properties of planar-oriented films of polymer dispersed cholesteric liquid crystals with tangential orientation of molecules at the interface were investigated. It is shown, that in this medium, a great difference is observed between the threshold parameters and the form of both polarized components of the volt-contrast characteristic. This effect is due to the specific features of structural transformations of the elongated cholesteric droplets in the electric field.
Ferroelectrics | 1998
E. P. Pozhidaev; S. L. Smorgon; A. L. Andreev; Igor N. Kompanets; V. Ya. Zyryanov; S. I. Kompanets
Abstract Polymer dispersed ferroelectric liquid crystal films were prepared and investigated. The saturation voltage less than 10 V, the polarized light transmittance 628%at the contrast ratio 45:1 or 75%at the contrast ratio 10:1 were reached.
Molecular Crystals and Liquid Crystals | 2001
S. L. Smorgon; A. V. Barannik; V. Ya. Zyryanov; E. P. Pozhidaev; A. L. Andreev; I. N. Kompanets; D. Ganzke; Wolfgang Haase
Abstract The structural and electrooptical properties of low-voltage composite material are discussed. The material presents a planar-oriented layer of ferroelectric liquid crystal divided into smaller sections by polymer walls and may be used in light modulators with geometry of crossed polarizers.
Proceedings of SPIE, the International Society for Optical Engineering | 1996
S. L. Smorgon; V. Ya. Zyryanov; V. F. Shabanov; Eugene P. Pozhidaev
Various types of polarizer-free light modulators based on polymer dispersed ferroelectric liquid crystals are discussed. Efficiency of light-modulation has been studied for different temperatures and values of the applied voltage.
