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Light-induced orientation of the molecules of nematic liquid crystals doped with comb-shaped polymers with different spatial distributions of chromophores

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Abstract

The orienting effect of light on nematic liquid crystals (NLCs) doped with comb-shaped polymers with different spatial distributions of side absorbing azobenzene fragments, i.e., a homopolymer (containing only azofragments), a block copolymer (containing additionally a block of non-absorbing fragments), and a statistical copolymer (containing randomly arranged absorbing and non-absorbing fragments) is experimentally studied. The light-induced Freedericksz transition threshold for the block copolymer is two times lower than that for the homopolymer. For NLC with statistical copolymer dopant, the first-order orientation transition with an extremely wide optical bistability region is observed.

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Authors and Affiliations

  1. Lebedev Physical Institute, Russian Academy of Sciences, Leninskii pr. 53, Moscow, 119991, Russia

    I. A. Budagovsky, A. S. Zolot’ko, T. E. Koval’skaya, M. P. Smayev & S. A. Shvetsov

  2. Moscow Institute of Physics and Technology, Institutskii per. 9, Dolgoprudnyi, Moscow Oblast, 141700, Russia

    S. A. Shvetsov

  3. Moscow State University, Moscow, 119991, Russia

    N. I. Boiko & M. A. Bugakov

  4. Shubnikov Institute of Crystallography, Russian Academy of Sciences, Leninskii pr. 59, Moscow, 119333, Russia

    M. I. Barnik

Authors
  1. I. A. Budagovsky
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  2. A. S. Zolot’ko
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  3. T. E. Koval’skaya
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  4. M. P. Smayev
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  5. S. A. Shvetsov
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  6. N. I. Boiko
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  7. M. A. Bugakov
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  8. M. I. Barnik
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Corresponding author

Correspondence to A. S. Zolot’ko.

Additional information

Original Russian Text © I.A. Budagovsky, A.S. Zolot’ko, T.E. Koval’skaya, M.P. Smayev, S.A. Shvetsov, N.I. Boiko, M.A. Bugakov, M.I. Barnik, 2014, published in Kratkie Soobshcheniya po Fizike, 2014, Vol. 41, No. 5, pp. 29–36.

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Budagovsky, I.A., Zolot’ko, A.S., Koval’skaya, T.E. et al. Light-induced orientation of the molecules of nematic liquid crystals doped with comb-shaped polymers with different spatial distributions of chromophores. Bull. Lebedev Phys. Inst. 41, 135–139 (2014). https://doi.org/10.3103/S1068335614050042

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  • DOI: https://doi.org/10.3103/S1068335614050042

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