Dynamical process of switch-off in a supertwisted nematic cell

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Dynamical process of switch-off in a supertwisted nematic cell

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dc.contributor.author Yang, Fuzi en_GB
dc.contributor.author Dong, Youmei en_GB
dc.contributor.author Ruan, Lizhen en_GB
dc.contributor.author Sambles, J. Roy en_GB
dc.contributor.department University of Exeter; Tsinghua University, Beijing en_GB
dc.date.accessioned 2008-06-06T11:04:06Z en_GB
dc.date.accessioned 2011-01-25T11:54:38Z en_US
dc.date.accessioned 2013-03-20T13:23:24Z
dc.date.issued 2004 en_GB
dc.description.abstract The switch-off dynamics of a 180° supertwisted nematic (STN) are explored in detail by using a convergent beam system and the fully leaky guided-mode technique. From the dynamical guided-mode data and using the Ericksen–Leslie theory, the director structure in the cell at different times during switch-off is obtained. We have studied the dynamic switch-off from different applied voltages and have found that the relaxation time is independent of the voltage. From fitting the optical data, the effective viscosities are obtained. It appears that two viscosity coefficients, γ and η1, largely control the dynamics of switch-off. From the analysis of the director tilt profile in the cell, it is found that there is no backflow-induced increased tilt at the cell center in the STN cell during the switch-off. From liquid crystal hydrodynamics, this no-backflow dynamic process in the STN cell is well explained. en_GB
dc.identifier.citation 96 (1), pp. 310-315 en_GB
dc.identifier.doi 10.1063/1.1757031 en_GB
dc.identifier.uri http://hdl.handle.net/10036/29614 en_GB
dc.language.iso en en_GB
dc.publisher American Institute of Physics en_GB
dc.relation.url http://dx.doi.org/10.1063/1.1757031 en_GB
dc.relation.url http://link.aip.org/link/?JAPIAU/96/310/1 en_GB
dc.subject nematic liquid crystals en_GB
dc.subject liquid crystal displays en_GB
dc.subject switching en_GB
dc.subject viscosity en_GB
dc.subject numerical analysis en_GB
dc.title Dynamical process of switch-off in a supertwisted nematic cell en_GB
dc.type Article en_GB
dc.date.available 2008-06-06T11:04:06Z en_GB
dc.date.available 2011-01-25T11:54:38Z en_US
dc.date.available 2013-03-20T13:23:24Z
dc.identifier.issn 0021-8979 en_GB
dc.description Copyright © 2004 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Journal of Applied Physics 96 (2004) and may be found at http://link.aip.org/link/?JAPIAU/96/310/1 en_GB
dc.identifier.journal Journal of Applied Physics en_GB


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