Time-resolved sign-dependent switching in a hybrid aligned nematic liquid crystal cell

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Time-resolved sign-dependent switching in a hybrid aligned nematic liquid crystal cell

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dc.contributor.author Taphouse, T. S. en_GB
dc.contributor.author Cornford, Stephen Leslie en_GB
dc.contributor.author Birkett, J. E. en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.department University of Exeter; HP Labs, Bristol en_GB
dc.date.accessioned 2009-01-29T14:59:38Z en_GB
dc.date.accessioned 2011-01-25T11:53:59Z en_US
dc.date.accessioned 2013-03-20T13:23:35Z
dc.date.issued 2008 en_GB
dc.description.abstract An optical waveguide technique is used to determine the director tilt profile across a hybrid aligned nematic (HAN) liquid crystal cell, in which the optical response is dependent on the sign of the applied voltage. Two physical models are shown that fit the equilibrium experimental data, but with alternative explanations for this sign dependence. Models with either a flexoelectric coefficient of 2.25×10−11 C m−1 or a bound surface charge of 12.2 μC m−2 are shown that fit this equilibrium data. In an attempt to resolve this degeneracy sign-dependent switching data are analysed. However, neither model can explain these switching data, which are affected by slow transients of ~100 ms which are believed to be due to the motion of free ions in the liquid crystal. From the form of these slow transients, it is suggested that the equilibrium position of the ions is next to a cell substrate. en_GB
dc.identifier.citation 10, article 083045 en_GB
dc.identifier.doi 10.1088/1367-2630/10/8/083045 en_GB
dc.identifier.uri http://hdl.handle.net/10036/48215 en_GB
dc.language.iso en en_GB
dc.publisher Institute of Physics and Deutsche Physikalische Gesellschaft en_GB
dc.relation.url http://dx.doi.org/10.1088/1367-2630/10/8/083045 en_GB
dc.relation.url http://www.iop.org/EJ/abstract/1367-2630/10/8/083045/ en_GB
dc.title Time-resolved sign-dependent switching in a hybrid aligned nematic liquid crystal cell en_GB
dc.type Article en_GB
dc.date.available 2009-01-29T14:59:38Z en_GB
dc.date.available 2011-01-25T11:53:59Z en_US
dc.date.available 2013-03-20T13:23:35Z
dc.identifier.issn 1367-2630 en_GB
dc.description Copyright © 2008 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. This is the published version of an article published in New Journal of Physics Vol. 10, article 083045. DOI: 10.1088/1367-2630/10/8/083045 en_GB
dc.identifier.journal New Journal of Physics en_GB


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