Trabi, C.L. and Brown, C.V. and Smith, A.A.T. and Mottram, N.J. (2008) Interferometric method for determining the sum of the flexoelectric coefficients (e1+e3) in an ionic nematic material. Applied Physics Letters, 92 (22). ISSN 00036951

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Abstract
The timedependent periodic distortion profile in a nematic liquid crystal phase grating has been measured from the displacement of tilt fringes in a MachZehnder interferometer. A 0.2 Hz squarewave voltage was applied to alternate stripe electrodes in an interdigitated electrode geometry. The timedependent distortion profile is asymmetric with respect to the polarity of the applied voltage and decays with time during each half period due to ionic shielding. This asymmetry in the response allows the determination of the sum of the flexoelectric coefficients (e1+e3) using nematic continuum theory since the device geometry does not possess inherent asymmetry.
Item type:  Article 

ID code:  13804 
Keywords:  interferometric method, flexoelectric coefficients, (e(1)+e(3)), ionic nematic material, Probabilities. Mathematical statistics, Physics, Physics and Astronomy (miscellaneous) 
Subjects:  Science > Mathematics > Probabilities. Mathematical statistics Science > Physics 
Department:  Faculty of Science > Mathematics and Statistics Faculty of Science > Mathematics and Statistics > Mathematics 
Depositing user:  Mrs Mary McAuley 
Date Deposited:  13 Jan 2010 10:47 
Last modified:  21 May 2015 11:02 
Related URLs:  
URI:  http://strathprints.strath.ac.uk/id/eprint/13804 
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