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http://dx.doi.org/10.3807/KJOP.2009.20.5.288

Analysis of Effective Optic Axis and Equivalent Retardation of Composite Optically Anisotropic Film by Using Transmission Ellipsometry  

Ryu, Jang-Wi (Department of Molecular Science and Technology, Ajou University)
Kim, Sang-Youl (Department of Molecular Science and Technology, Ajou University)
Publication Information
Korean Journal of Optics and Photonics / v.20, no.5, 2009 , pp. 288-293 More about this Journal
Abstract
Polarization characteristics of a composite film composed of two optically anisotropic films are analyzed. The procedure to determine the effective optics axis and the equivalent retardation of the composite film is suggested in conjuction with the related ellipsometric expressions. The explicit expressions of the effective optic axis and the equivalent retardation of a non-uniform anisotropic film are derived when all optic axes are parallel. Those expressions of the composite film where optic axes of two constituting anisotropic films are not parallel are also derived. Dependence of those expressions on the polarization state of the incident light or the azimuth angle of the linearly polarized light and their limit when applied to practical use are discussed.
Keywords
Equivalent retardation; Effective optic axis; Optical anisotropy; Transmission ellipsometry; Composite anisotropic film;
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