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Optical response from dual-frequency hybrid-aligned nematic liquid crystal cells

  • Optics, Quantum Electronics
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Abstract

Dual-frequency hybrid-aligned nematic liquid crystal cells and the influence of the parameters of a control electric field on their optical response are studied. It is found that the harmonic oscillations of the optical transmission in such cells are observed in the interval between low frequency-to-high frequency voltage switchings unlike in conventional twisted nematic cells. A V-shaped bistable optical response is obtained by successively applying sinusoidal electric fields with frequencies of 1 and 30 kHz to a twisted nematic cell. For a liquid crystal layer 8 μm thick and an applied voltage of 50 V, the response time is 10 ms. In a hybrid-aligned twisted-nematic cell with a large initial tilt angle of the director (about 70°), the V-shaped optical response is observed when the inclined homeotropic state is switched to the twisted state by applying a 30-kHz field. The initial structure of the layer recovers as a result of natural elastic relaxation, and the response time increases roughly fourfold.

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Authors and Affiliations

  1. St. Petersburg State University of Information Technologies, Mechanics, and Optics, Kronverkskii pr. 49, St. Petersburg, 197101, Russia

    E. A. Konshina, D. A. Vakulin, N. L. Ivanova, E. O. Gavrish & V. N. Vasil’ev

Authors
  1. E. A. Konshina
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  2. D. A. Vakulin
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  3. N. L. Ivanova
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  4. E. O. Gavrish
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  5. V. N. Vasil’ev
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Correspondence to E. A. Konshina.

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Original Russian Text © E.A. Konshina, D.A. Vakulin, N.L. Ivanova, E.O. Gavrish, V.N. Vasil’ev, 2012, published in Zhurnal Tekhnicheskoi Fiziki, 2012, Vol. 82, No. 5, pp. 66–70.

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Konshina, E.A., Vakulin, D.A., Ivanova, N.L. et al. Optical response from dual-frequency hybrid-aligned nematic liquid crystal cells. Tech. Phys. 57, 644–648 (2012). https://doi.org/10.1134/S1063784212050179

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  • DOI: https://doi.org/10.1134/S1063784212050179

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