Characterization of the alignment of a nematic liquid crystal using half leaky guided modes
作者:
R.A. Stevens,
J.R. Sambles,
期刊:
Liquid Crystals
(Taylor Available online 1995)
卷期:
Volume 18,
issue 3
页码: 413-417
ISSN:0267-8292
年代: 1995
DOI:10.1080/02678299508036639
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The excitation of half leaky guided optical modes to characterize fully the optical tensor profile in a thin liquid crystal layer has been used to evaluate the effect of rubbed polyimide aligning layers on the alignment of a nematic liquid crystal. A cell fabricated with rubbed polyimide alignment surfaces was studied at a wavelength of 632.8 nm. The liquid crystalline layer is sandwiched between a high refractive index top glass plate and a low refractive index glass substrate. Angular dependent reflectivities are recorded using a coupling prism and matching fluid with the same index as the top glass plate. Careful fitting of the predictions from multilayer optics theory to the observed angle dependent polarization conversion and reflectivity data yields the director profile within the liquid crystal layer in great detail.
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