Optical manifestation of thermal expansion of a nematic liquid crystal

Oleg D. Lavrentovich; Young-Ki Kim; Bohdan I. Senyuk

doi:10.1117/12.927745

11 October 2012 Optical manifestation of thermal expansion of a nematic liquid crystal

Oleg D. Lavrentovich, Young-Ki Kim, Bohdan I. Senyuk

Proceedings Volume 8475, Liquid Crystals XVI; 84750G (2012) https://doi.org/10.1117/12.927745
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States

Abstract

A unique feature of liquid crystals (LCs) is orientational order of molecules that can be controlled by electromagnetic fields, surface modifications and pressure gradients. We describe a new effect in which the orientation of LC molecules is altered by thermal expansion. Thermal expansion (or contraction) causes the LC to flow; the flow imposes an orienting torque on the LC molecules and the optical axis. The optical and mechanical responses activated by a simple temperature changes can be used in sensing, photonics, microfluidic, optofluidic and lab-on-a-chip applications as they do not require externally imposed gradients of temperature, pressure nor electromagnetic fields.

Citation Download Citation

Oleg D. Lavrentovich, Young-Ki Kim, and Bohdan I. Senyuk "Optical manifestation of thermal expansion of a nematic liquid crystal", Proc. SPIE 8475, Liquid Crystals XVI, 84750G (11 October 2012); https://doi.org/10.1117/12.927745

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