Angular dependences of transmission spectra of chiral liquid crystals
- Authors: Umanskii B.A.1, Simdyankin I.V.1
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Affiliations:
- Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics”
- Issue: Vol 62, No 3 (2017)
- Pages: 448-454
- Section: Liquid Crystals
- URL: https://journals.rcsi.science/1063-7745/article/view/191037
- DOI: https://doi.org/10.1134/S1063774517030233
- ID: 191037
Cite item
Abstract
Transmission spectra of chiral nematic liquid crystals (CNLCs) and chiral smectic С* liquid crystals (CSLCs) are studied in a wide range of angles of light propagation with respect to the direction of the helical structure axis. To this end, both a planar LC cell and a cell consisting of two substrates in the form of rectangular prisms (30° × 60° × 90°) were used, which allowed measurements of the transmission spectra at the light propagation at angles up to 65° with respect to the helical axis direction. The transmission spectra are numerically simulated; the results are in good agreement with the experimental spectra. A technique for determining the tilt angle of molecules in smectic layers is proposed based on the comparative analysis of experimental and calculated transmission spectra of CSLC.
About the authors
B. A. Umanskii
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics”
Author for correspondence.
Email: umanskii@yahoo.com
Russian Federation, Moscow, 119933
I. V. Simdyankin
Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics”
Email: umanskii@yahoo.com
Russian Federation, Moscow, 119933