Skip to main content
Log in

Orientational optical torque in a nematic liquid crystal, caused by trans- and cis-isomers of low- and high-molecular compounds

  • Published:
Bulletin of the Lebedev Physics Institute Aims and scope Submit manuscript

Abstract

The effect of light on the conformational composition of low- and high-molecular (fifth-generation dendrimer) azobenzene dyes in a nematic host is studied. The orientational optical response of the nematic liquid crystal (NLC), caused by the presence of these compounds in the nematic host, is measured. The contributions of isomers to the orientational optical torque affecting the NLC director are determined. The results obtained suggest that the increase in the optical orientation efficiency in NLCs when using high-molecular dopants instead of low-molecular ones is unrelated to the difference in their conformational composition in the light field, but is caused by deceleration of orientational motion of chromophores.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. I. Jánossy, L. Csillag, and A. D. Lloyd, Phys. Rev. A 44, 8410 (1991).

    Article  ADS  Google Scholar 

  2. L. Marrucci, D. Paparo, P. Maddalena, et al., J. Chem. Phys. 107, 9783 (1997).

    Article  ADS  Google Scholar 

  3. M. I. Barnik, A. S. Zolot’ko, V. G. Rumyantsev, and D. B. Terskov, Kristallografiya 40, 746 (1995) [Crystallogr. Rep. 40, 691 (1995)].

    Google Scholar 

  4. I. A. Budagovsky, A. S. Zolot’ko, V. N. Ochkin, et al., Zh. Eksp. Teor. Fiz. 133, 204 (2008) [J. Exp. Theor. Phys. 106, 172 (2008)].

    Google Scholar 

  5. I. Jánossy and L. Szabados, Phys. Rev. E 58, 4598 (1998).

    Article  ADS  Google Scholar 

  6. I. A. Budagovsky, V. N. Ochkin, and M. P. Smayev, et al., Liq. Cryst. 36, 101 (2009).

    Article  Google Scholar 

  7. A. S. Zolot’ko, I. A. Budagovsky, V. N. Ochkin, et al., Mol. Cryst. Liq. Cryst. 488, 265 (2008).

    Article  Google Scholar 

  8. I. A. Budagovsky, A. S. Zolot’ko, T. E. Koval’skaya, et al., Kratkie Soobshcheniya po Fizike FIAN 40(1), 10 (2013) [Bulletin of the Lebedev Physics Institute 40, 6 (2013)].

    Google Scholar 

  9. I. Jánossy, Phys. Rev. E 49, 2957 (1994).

    Article  ADS  Google Scholar 

  10. L. Marrucci and D. Paparo, Phys. Rev. E 56, 1765 (1997).

    Article  ADS  Google Scholar 

  11. A. S. Zolot’ko, Pisma Zh. Eksp. Teor. Fiz. 68, 410 (1998) [JETP Lett. 68, 437 (1998)].

    Google Scholar 

  12. H. Seiberle, W. Stille, and G. Strobl, Macromolecules 23, 2008 (1990).

    Article  ADS  Google Scholar 

  13. S. Gotz, W. Stille, G. Strobl, and H. Scheuermann, Macromolecules 26, 1520 (1993).

    Article  ADS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to I. A. Budagovsky.

Additional information

Original Russian Text © I.A. Budagovsky, A.S. Zolot’ko, M.P. Smayev, S.A. Shvetsov, N.I. Boiko, 2016, published in Kratkie Soobshcheniya po Fizike, 2016, Vol. 43, No. 5, pp. 45–53.

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Budagovsky, I.A., Zolot’ko, A.S., Smayev, M.P. et al. Orientational optical torque in a nematic liquid crystal, caused by trans- and cis-isomers of low- and high-molecular compounds. Bull. Lebedev Phys. Inst. 43, 179–183 (2016). https://doi.org/10.3103/S1068335616050067

Download citation

  • Received:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.3103/S1068335616050067

Keywords

Navigation