Journal
MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Volume 351, Issue -, Pages 87-94Publisher
GORDON BREACH SCI PUBL LTD
DOI: 10.1080/10587250008023256
Keywords
optical waveguides; azimuthal anchoring energy; twist elastic constant
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In this work we present a new optical guided mode technique which is used to monitor small perturbations to the director twist profile in a conventional liquid crystal cell. The cell is filled with nematic liquid crystal E7 which is homogeneously aligned using rubbed polyimide. Twist distortions are induced via the application of weak in-plane electric fields. Careful analysis of these distortions allows both the twist elastic constant, k(22) and the azimuthal anchoring strength, W-a, of the cell to be determined.
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