| Issue |
Europhys. Lett.
Volume 58, Number 1, April 2002
|
|
|---|---|---|
| Page(s) | 67 - 73 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00607-5 | |
| Published online | 01 August 2002 | |
Three-dimensional dye distribution in photo-oriented liquid-crystal alignment layers
1
Condensed Matter Laboratory-Department
of Physics, University of Colorado
Boulder, CO 80309, USA
2
Liquid Crystal Institute-Kent State
University - Kent, OH 44242, USA
Received:
13
July
2001
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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