Robust measurement of flexoelectro-optic switching with different surface alignments

The alignment of chiral nematic liquid crystals in the so-called uniform lying helix geometry allows for the observation and exploitation of the flexoelectro-optic effect. However, high-quality uniform lying helix alignment is difficult to achieve reliably, and this can potentially impact the accura...

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Bibliographic Details
Published in:Journal of applied physics 2019-03, Vol.125 (9)
Main Authors: Sandford O’Neill, John J., Fells, Julian A. J., Welch, Chris, Mehl, Georg, Yip, Wing C., Wilkinson, Timothy D., Booth, Martin J., Elston, Steve J., Morris, Stephen M.
Format: Article
Language:English
Subjects:
Alignment
Applied physics
Cholesteric liquid crystals
Nematic crystals
Switching
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Summary:The alignment of chiral nematic liquid crystals in the so-called uniform lying helix geometry allows for the observation and exploitation of the flexoelectro-optic effect. However, high-quality uniform lying helix alignment is difficult to achieve reliably, and this can potentially impact the accuracy of the measurements made on the flexoelectro-optic switching behaviour. Here, we show that, using an appropriate method, it is possible to make measurements of the flexo-electric coefficients that are not substantially influenced by the alignment quality.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.5086241