Asymmetric director structures and flexoelectricity in nematic pi-cell devices

The sum of the flexoelectric coefficients in a liquid crystal material has been measured in nematic pi-cell devices, based on a method that exploits the asymmetry in the director configurations of the different states in a pi-cell, the uniform surface alignment polarities, and the influence of ions....

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Bibliographic Details
Published in:Applied physics letters 2015-08, Vol.107 (8)
Main Authors: Tartan, Chloe C., Elston, Steve J.
Format: Article
Language:English
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Summary:The sum of the flexoelectric coefficients in a liquid crystal material has been measured in nematic pi-cell devices, based on a method that exploits the asymmetry in the director configurations of the different states in a pi-cell, the uniform surface alignment polarities, and the influence of ions. A value of |e1 + e3| = 10 pC m−1 was measured from data-theory comparisons in the standard commercial eutectic E7 nematic liquid crystal mixture.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4929385