Jpn. J. Appl. Phys. 43 (2004) pp. L649-L651 |Previous Article| |Next Article| |Table of Contents|
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Determination of Polar Anchoring Strength at Vertical Alignment Nematic Liquid Crystal-Wall Interface Using Thin Hybrid Alignment Nematic Cell
Department of Electrical Engineering, Faculty of Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata 940-2188, Japan
(Received January 13, 2004; accepted March 11, 2004; published April 23, 2004)
A method of determining the polar anchoring strength Wd of a vertical alignment nematic liquid crystal-wall interface is proposed. Wd is evaluated from the measurements of the optical retardation of a thin hybrid alignment nematic cell as a function of the wavelength of the incident light and cell rotating angles. As an example, the anchoring strength Wd = 2.5 ×10-4 [J/m2] is measured at the interface between the nematic mixture ZLI-2293 and the polyimide vertical alignment film PI-1.
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