Photoinduced surface alignment: The role of liquid-crystalline order

I. Jánossy, A. Vajda, T. Paksi, T. Kósa

Research output: Contribution to journalConference article

12 Citations (Scopus)


The optical control of surface alignment was investigated, using azo-dye doped polyimide films as photosensitive material. The kinetics of the realignment of the easy axis was measured in isotropic, nematic and smectic A phases. It is demonstrated that the light-induced realignment of the dye molecules at the polymer-liquid crystal interface is strongly influenced by the presence of the liquid-crystalline order. A simple model is presented, which accounts qualitatively for the experimental observations.

Original languageEnglish
Pages (from-to)157-166
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology, Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - Jan 1 2001
EventVIII International Topical Meeting on Optics of Liquid Crystals (OLC'99) - Humacao, Puerto Rico
Duration: Sep 27 1999Oct 1 1999


  • Dye-doped polymers
  • Photoalignment

ASJC Scopus subject areas

  • Condensed Matter Physics

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