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9 March 2022 Creation and control of twist in nematic liquid crystal director via bulk photoalignment
Sarah Hicks, Kyungmin Lee, Michael E. McConney, Nicholas P. Godman, Nelson Tabiryan, Timothy J. Bunning
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Proceedings Volume PC12023, Emerging Liquid Crystal Technologies XVII; PC1202304 (2022) https://doi.org/10.1117/12.2608200
Event: SPIE OPTO, 2022, San Francisco, California, United States
Abstract
Photoalignment of azobenzenes is one of the most versatile tools for liquid crystal self-assembly for both the surface and bulk. An azobenzene component is homogenously mixed with a liquid crystal and irradiated with polarized visible light. By utilizing a simple two-step exposure method, we can induce photoalignment on the front and back of the liquid crystal sample independently. This back to front alignment, if varying in LC director orientation, translates into a twist through the bulk. In this talk, we discuss the two-step exposure method and how to control the twist as well as introduce characterization methods on twist quantification.
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Sarah Hicks, Kyungmin Lee, Michael E. McConney, Nicholas P. Godman, Nelson Tabiryan, and Timothy J. Bunning "Creation and control of twist in nematic liquid crystal director via bulk photoalignment", Proc. SPIE PC12023, Emerging Liquid Crystal Technologies XVII, PC1202304 (9 March 2022); https://doi.org/10.1117/12.2608200
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KEYWORDS
Liquid crystals
Beam steering
Optical lithography
Polarization
Visible radiation
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