Efficient optical technique for the characterisation of twist elastic constant and thin liquid crystal cells (Conference Presentation)

Oleksandr Buchnev; Nina Podoliak; Giampaolo D'Alessandro; Denitsa Bankova; Nicolas Brouckaert; Malgosia Kaczmarek

doi:10.1117/12.2647725

14 March 2023 Efficient optical technique for the characterisation of twist elastic constant and thin liquid crystal cells (Conference Presentation)

Oleksandr Buchnev, Nina Podoliak, Giampaolo D'Alessandro, Denitsa Bankova, Nicolas Brouckaert, Malgosia Kaczmarek

Author Affiliations +

Proceedings Volume PC12442, Emerging Liquid Crystal Technologies XVIII; PC1244203 (2023) https://doi.org/10.1117/12.2647725
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

Current liquid crystal technologies often rely on the use of optically thin cells and new liquid crystals. The characterisation of their parameters, such as elastic constants, including twist elastic constant and pretilt, key to control the liquid crystal response, poses several challenges. We present an optical method that successfully characterises such liquid crystal devices, is relatively simple yet a powerful probe of their static and dynamical properties. The method is demonstrated for the cells with the total phase lag smaller than 2pi and for experimental liquid crystals, where optical and dielectric properties are only partially known and for estimating K2.

Conference Presentation

Citation Download Citation

Oleksandr Buchnev, Nina Podoliak, Giampaolo D'Alessandro, Denitsa Bankova, Nicolas Brouckaert, and Malgosia Kaczmarek "Efficient optical technique for the characterisation of twist elastic constant and thin liquid crystal cells (Conference Presentation)", Proc. SPIE PC12442, Emerging Liquid Crystal Technologies XVIII, PC1244203 (14 March 2023); https://doi.org/10.1117/12.2647725

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