Spectral investigation of different LC polymorphic modifications with induced spiral structure

Andrey G. Iljin; Gertruda V. Klimusheva; Viktor I. Kulishov; A. G. Tereshchenko; A. S. Tolochko; L. P. Yatsenko

doi:10.1117/12.385671

12 May 2000 Spectral investigation of different LC polymorphic modifications with induced spiral structure

Andrey G. Iljin, Gertruda V. Klimusheva, Viktor I. Kulishov, A. G. Tereshchenko, A. S. Tolochko, L. P. Yatsenko

Proceedings Volume 4147, Liquid Crystals: Chemistry, Physics, and Applications; (2000) https://doi.org/10.1117/12.385671
Event: XIII International Conference on Liquid Crystals: Chemistry, Physics, and Applications, 1999, Krynica Zdroj, Poland

Abstract

According to the papers, liquid crystalline mixtures of achiral mesogen matrix and chiral mesogen additive area of great interest for the investigations of structural and physical properties of twist-grain-boundary (TGB) phases. Such systems allow studying the changes of the structure and properties of TGB phases resulting from the difference in the chiral additive concentration. We used liquid crystalline systems, polymorphism, structure and some physical properties of which had been investigated earlier. Of particular interest was to investigate selective reflection spectra and optical activity of helical smectic A (SmA*) in comparison with the same properties of the neighboring mesophases--a chiral nematic liquid crystal (N*) and a smectic C (SmC*)--with the different temperatures and chiral agent's concentrations. A comparative analysis of obtained spectral and optical characteristics of described mesophases and some conclusions on the peculiarities of the packing structure of these phases have been made in this paper.

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Andrey G. Iljin, Gertruda V. Klimusheva, Viktor I. Kulishov, A. G. Tereshchenko, A. S. Tolochko, and L. P. Yatsenko "Spectral investigation of different LC polymorphic modifications with induced spiral structure", Proc. SPIE 4147, Liquid Crystals: Chemistry, Physics, and Applications, (12 May 2000); https://doi.org/10.1117/12.385671

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