Alignment of reactive LC mesogen by relief diffraction grating

Vladimir Soloviev; Yuri B. Boiko; Piero P. Perlo; Chander Prakash Grover

doi:10.1117/12.467456

14 May 2002 Alignment of reactive LC mesogen by relief diffraction grating

Vladimir Soloviev, Yuri B. Boiko, Piero P. Perlo, Chander Prakash Grover

Proceedings Volume 4658, Liquid Crystal Materials, Devices, and Applications VIII; (2002) https://doi.org/10.1117/12.467456
Event: Electronic Imaging, 2002, San Jose, California, United States

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 .

Citation Download Citation

Vladimir Soloviev, Yuri B. Boiko, Piero P. Perlo, and Chander Prakash Grover "Alignment of reactive LC mesogen by relief diffraction grating", Proc. SPIE 4658, Liquid Crystal Materials, Devices, and Applications VIII, (14 May 2002); https://doi.org/10.1117/12.467456

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