Optics of oblique helicoidal cholesterics

Oleg D. Lavrentovich

doi:10.1117/12.2564924

20 August 2020 Optics of oblique helicoidal cholesterics

Oleg D. Lavrentovich

Proceedings Volume 11472, Liquid Crystals XXIV; 1147202 (2020) https://doi.org/10.1117/12.2564924
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

Liquid crystal materials containing flexible molecular dimers and chiral dopants form a peculiar type of a cholesteric with an oblique helicoidal structure (ChOH), in which the director is titled with respect to the helicoidal axis rather than orthogonal to it, as in regular cholecterics. The heliconical ChOH state occurs in presence of an electric or magnetic field. Tilted configuration of the director and absence of density modulation makes ChOH a unique material for various electro-optical applications. The presentation discusses electrically tunable selective reflection by ChOH and how it can be used to get an insight into the elastic properties of these materials such as bend modulus. The work is supported by NSF grant ECCS-190610.

Conference Presentation

Citation Download Citation

Oleg D. Lavrentovich "Optics of oblique helicoidal cholesterics", Proc. SPIE 11472, Liquid Crystals XXIV, 1147202 (20 August 2020); https://doi.org/10.1117/12.2564924

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