Abstract
In this study, we demonstrated the evaluation of the device parameters, such as the cell thickness , pretilt angles at the top and bottom substrates and , and twist angle for the guest–host (GH)-type electrically controlled birefringence (ECB) and twisted nematic (TN) modes, using the renormalized transmission ellipsometry (RTE). In the proposed technique, the extended Cauchy equation and the extinction coefficients for the ordinary and extraordinary rays based on the three Gaussian functions were employed as a description of the dielectric function. As a result, the numerically calculated phase difference and angle of amplitude ratio determined using the proposed technique provided good agreement with the measured and by introducing the extinction coefficient to the RTE. Furthermore, the device parameters for the GH-ECB and the GH-TN cells were obtained. It was confirmed that the extinction coefficient should be taken into consideration in an analysis of GH liquid crystal displays.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
Sheng-Ya Wang and Kei-Hsiung Yang
Appl. Opt. 52(2) 219-225 (2013)
Victor Belyaev, Alexey Solomatin, and Denis Chausov
Opt. Express 21(4) 4244-4249 (2013)
Victor V. Belyaev, Alexey S. Solomatin, and Denis N. Chausov
Appl. Opt. 52(13) 3012-3019 (2013)