Presentation
9 March 2022 Creation and control of twist in nematic liquid crystal director via bulk photoalignment
Author Affiliations +
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.
Conference Presentation
© (2022) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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