TITLE

Optical alignment and fixation of liquid crystals using azopolymer networks

AUTHOR(S)
Yue Zhap; Chénard, Yanick; Galstian, Tigran V.
PUB. DATE
October 2000
SOURCE
Applied Physics Letters;10/23/2000, Vol. 77 Issue 17
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Anisotropic gels of a nematic liquid crystal (NLC) were prepared using optical alignment and fixation in the absence of surface orientation layers. The method consists of first making a homogeneous mixture that contains a reactive diacrylate monomer bearing azobenzene group, a nonreactive NLC and a photoinitiator, then irradiating the mixture by a laser at λ=532 nm for the liquid crystal (LC) orientation induction. Subsequently, the mixture is exposed by a second laser at λ=350 nm for photopolymerization giving rise to anisotropic azobenzene network. Infrared dichroism measurements show that a remnant long-range LC orientation is retained by the network. © 2000 American Institute of Physics.
ACCESSION #
4414673

 

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