Interferometric method for the measurement of the flexoelectric polarisation using nematic liquid crystal phase gratings

C.L. Trabi, A.A.T. Smith, C.V. Brown

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    An interferometric method using a nematic liquid crystal phase grating has recently been developed for determining the sum of the flexoelectric coefficients, (e1 + e3) [C. Trabi, C. V. Brown, A. A. T. Smith and N. J. Mottram, Appl. Phys. Lett. 92, 223509 (2008)]. The switching response of the device can be simulated if the applied 0.2 Hz squarewave voltage in the nematic layer is modified so that it is enhanced by a reverse ion-field after each polarity reversal and then decays with time. This process has been investigated using measurements of the transient capacitance of a planar nematic layer to the same waveform.
    Original languageEnglish
    Pages (from-to)1120-1134
    Number of pages14
    JournalMolecular Crystals and Liquid Crystals
    Volume509
    DOIs
    Publication statusPublished - 3 Sep 2009

    Keywords

    • dielectrics
    • diffraction optical element
    • nematic liquid crystals
    • transient capacitance

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