Optical Fréedericksz transition and director field structure recording in dye-doped nematic liquid-crystalline polymer

Ivan Budagovsky, Aleksey Kuznetsov, Sergey Shvetsov, Mikhail Smayev, Alexander Zolot'ko, Pavel Statsenko, Sergey Trashkeev, Alexey Bobrovsky, Natalia Boiko, Valery Shibaev

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Dye-doped nematic liquid-crystalline polymers exhibit much higher orientational optical response than the systems based on low-molar-mass liquid crystals. In addition, polymer materials possess the glassy state, which allows one to record their supramolecular structure. We study the effect of light field inhomogeneity on the director deformation in the geometry of Fréedericksz transition and recording of corresponding phase structures. The relationship of the light beam width with the threshold light intensity and the size of the induced and recorded deformation region was determined. An influence of the beam waist radius on the polymer director relaxation time was detected. The results of numerical calculations based on the continuum theory and the independence of the enhancement factor of the optical torque on light–polymer interaction geometry agree with the experimental data.

Original languageEnglish
Pages (from-to)275-281
Number of pages7
JournalJournal of Molecular Liquids
Volume276
DOIs
Publication statusPublished - 15 Feb 2019

Keywords

  • Fréedericksz transition
  • Liquid-crystalline polymer
  • Optical nonlinearity
  • Optical recording
  • Supramolecular structure
  • BEAM
  • PHASE
  • LASER-INDUCED REORIENTATION
  • LIGHT-INDUCED ORIENTATION
  • Freedericksz transition
  • MOLECULAR-REORIENTATION
  • DEPENDENCE

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