Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation

T. Börzsönyi, A. P. Krekhov, O. A. Scaldin, A. Buka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

A homeotropic nematic liquid crystal was exposed to low frequency oscillatory shear (Couette flow). In the presence of rectilinear shear a stationary roll pattern was found above a critical amplitude (Ac). In case of elliptical excitation a spatially nonuniform slow rotation of the director was observed, which lead to the propagation of the so called phase waves in two different systems: in a two-phase (nematic-isotropic) system and in a homeotropic nematic layer in the presence of a destabilizing external electric field. Phase waves also have been observed in the ultrasonic frequency range at much smaller shear amplitudes.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsM Tykarska, R Dabrowski, J Zielinski
Pages129-132
Number of pages4
Volume3319
DOIs
Publication statusPublished - 1997
EventLiquid Crystals: Chemistry and Structure - Zakopane, Poland
Duration: Mar 3 1997Mar 8 1997

Other

OtherLiquid Crystals: Chemistry and Structure
CountryPoland
CityZakopane
Period3/3/973/8/97

Fingerprint

shear
Nematic liquid crystals
Shear flow
excitation
Couette flow
Ultrasonics
Electric fields
ultrasonics
frequency ranges
liquid crystals
low frequencies
propagation
electric fields

Keywords

  • Nematic liquid crystal
  • Pattern formation
  • Shear flow

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Börzsönyi, T., Krekhov, A. P., Scaldin, O. A., & Buka, A. (1997). Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation. In M. Tykarska, R. Dabrowski, & J. Zielinski (Eds.), Proceedings of SPIE - The International Society for Optical Engineering (Vol. 3319, pp. 129-132) https://doi.org/10.1117/12.301268

Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation. / Börzsönyi, T.; Krekhov, A. P.; Scaldin, O. A.; Buka, A.

Proceedings of SPIE - The International Society for Optical Engineering. ed. / M Tykarska; R Dabrowski; J Zielinski. Vol. 3319 1997. p. 129-132.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Börzsönyi, T, Krekhov, AP, Scaldin, OA & Buka, A 1997, Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation. in M Tykarska, R Dabrowski & J Zielinski (eds), Proceedings of SPIE - The International Society for Optical Engineering. vol. 3319, pp. 129-132, Liquid Crystals: Chemistry and Structure, Zakopane, Poland, 3/3/97. https://doi.org/10.1117/12.301268
Börzsönyi T, Krekhov AP, Scaldin OA, Buka A. Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation. In Tykarska M, Dabrowski R, Zielinski J, editors, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3319. 1997. p. 129-132 https://doi.org/10.1117/12.301268
Börzsönyi, T. ; Krekhov, A. P. ; Scaldin, O. A. ; Buka, A. / Pattern formation in homeotropic nematic induced by mechanical rectilinear and elliptical oscillatory excitation. Proceedings of SPIE - The International Society for Optical Engineering. editor / M Tykarska ; R Dabrowski ; J Zielinski. Vol. 3319 1997. pp. 129-132
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