Volume 58, Number 1, April 2002
|Page(s)||67 - 73|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 August 2002|
Three-dimensional dye distribution in photo-oriented liquid-crystal alignment layers
Condensed Matter Laboratory-Department
of Physics, University of Colorado
Boulder, CO 80309, USA
2 Liquid Crystal Institute-Kent State University - Kent, OH 44242, USA
Accepted: 11 January 2002
The three-dimensional optical anisotropy of photo-buffed dye-doped polymer films and the resulting orientation imparted to a liquid crystal in contact are probed using total internal reflection. Although the linearly polarized writing light generates a uniaxial distribution of dye molecules, the polymer films are biaxial, a result of symmetry breaking by the film surface.
PACS: 61.30.Hn – Surface phenomena: alignment, anchoring, anchoring transitions, surface-induced layering, surface-induced ordering, wetting, prewetting transitions, and wetting transitions / 61.30.Gd – Orientational order of liquid crystals; electric and magnetic field effects on order / 42.70.Jk – Polymers and organics
© EDP Sciences, 2002
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