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

    4 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.
    LanguageEnglish
    Pages1120-1134
    Number of pages14
    JournalMolecular Crystals and Liquid Crystals
    Volume509
    DOIs
    Publication statusPublished - 3 Sep 2009

    Fingerprint

    Nematic liquid crystals
    Capacitance
    liquid crystals
    gratings
    Ions
    Polarization
    Electric potential
    polarization
    polarity
    waveforms
    capacitance
    electric potential
    decay
    coefficients
    ions

    Keywords

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

    Cite this

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    Interferometric method for the measurement of the flexoelectric polarisation using nematic liquid crystal phase gratings. / Trabi, C.L.; Smith, A.A.T.; Brown, C.V.

    In: Molecular Crystals and Liquid Crystals, Vol. 509, 03.09.2009, p. 1120-1134.

    Research output: Contribution to journalArticle

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    T1 - Interferometric method for the measurement of the flexoelectric polarisation using nematic liquid crystal phase gratings

    AU - Trabi, C.L.

    AU - Smith, A.A.T.

    AU - Brown, C.V.

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    KW - dielectrics

    KW - diffraction optical element

    KW - nematic liquid crystals

    KW - transient capacitance

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