123. Twisted phase gratings induced by photoregulatged mesogenic molecules on the surface of photoreactive polymer liquid crystal film, H. Ono, T. Sasaki, A. Emoto, E. Uchida and N. Kawatsuki, Appl. Phys. Lett., 89 (2006) 261918.


Three-dimensional phase gratings with twisted structures were self-organized by photoregulated
mesogenic molecules on the surface of photocrosslinkable polymer liquid crystal film. The
molecules are selectively photoreacted only at the surface of the film under the polarization
holographic illumination, and the resultant photocrosslinked mesogenic molecules induce the
three-dimensional twisted gratings in the film during annealing process. The diffraction properties
were well explained by means of Jones calculus and diffraction theory.

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