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Proceedings Paper

Alignment of reactive LC mesogen by relief diffraction grating
Author(s): Vladimir Soloviev; Yuri B. Boiko; Piero P. Perlo; Chander Prakash Grover
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Paper Abstract

It is demonstrated experimentally that an efficient alignment of a reactive liquid crystal (LC) mesogen is achievable by employing a relief diffraction grating having a pitch smaller than the correlation length of the LC mesogen. Full alignment of the reactive LC mesogen using a 500 lines/mm diffraction grating is confirmed by polarization microscopy. A grating of 200 lines/mm exhibited partial alignment in the deepest regions of the groove. Alignment was not maintained in areas closer to the relief profile peaks of the periodic structure (which caused the spatial modulation of the alignment to occur). UV exposure of the aligned layer allowed to permanently fix the alignment due to polymerization of the unsaturated acrylate bonds. We estimate the correlation length of the reactive mesogen from this experiment to be 5 micrometers <(kappa) <2 micrometers .

Paper Details

Date Published: 14 May 2002
PDF: 5 pages
Proc. SPIE 4658, Liquid Crystal Materials, Devices, and Applications VIII, (14 May 2002); doi: 10.1117/12.467456
Show Author Affiliations
Vladimir Soloviev, Samara Aerospace Univ. (Russia)
Yuri B. Boiko, National Research Council Canada (Canada)
Piero P. Perlo, FIAT Research Ctr. (Italy)
Chander Prakash Grover, National Research Council Canada (Canada)


Published in SPIE Proceedings Vol. 4658:
Liquid Crystal Materials, Devices, and Applications VIII
Liang-Chy Chien, Editor(s)

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