Bulk photoalignment of nematic liquid crystals by addition of azobenzene components

Sarah Hicks; Michael E. McConney; Kyung Min Lee; Nelson V. Tabirian; Timothy J. Bunning; Elizabeth Bernhardt

doi:10.1117/12.2577673

5 March 2021 Bulk photoalignment of nematic liquid crystals by addition of azobenzene components

Sarah Hicks, Michael E. McConney, Kyung Min Lee, Nelson V. Tabirian, Timothy J. Bunning, Elizabeth Bernhardt

Proceedings Volume 11707, Emerging Liquid Crystal Technologies XVI; 117070B (2021) https://doi.org/10.1117/12.2577673
Event: SPIE OPTO, 2021, Online Only

Abstract

Surface photoalignment has been utilized to control the liquid crystalline (LC) orientation by exposing the photosensitive surface coatings to linearly polarized light. However, there are limitations in cell thickness and director orientation complexity if surface photoalignment was conducted. An alternative approach in controlling the director orientation is bulk photoalignment. Azobenzenes, which have been used for surface photoalignment due to fast reorientation during exposure, are homogeneously mixed into a nematic LC. We present results on how azobenzene doped LCs can be aligned in various standard orientations. In addition, rewriting alignment and patterning complex director orientations via bulk alignment will be discussed.

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Sarah Hicks, Michael E. McConney, Kyung Min Lee, Nelson V. Tabirian, Timothy J. Bunning, and Elizabeth Bernhardt "Bulk photoalignment of nematic liquid crystals by addition of azobenzene components", Proc. SPIE 11707, Emerging Liquid Crystal Technologies XVI, 117070B (5 March 2021); https://doi.org/10.1117/12.2577673

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KEYWORDS

Liquid crystals

Crystals

Liquids

Optical lithography

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