Analog modulation by the flexoelectric effect in liquid crystals

Yip, W. C.; Welch, Chris; Mehl, Georg H.; Wilkinson, Timothy D.

Abstract

We have solved the long-standing problems of stability and hysteresis, and we are able to obtain the homogeneous uniform lying helix structure in polymer-free cholesteric liquid crystals. This is instrumental for the present work to demonstrate the analog modulation at high speed and high precision. The device is configured for the transverse field switching wherein the substrate surface is flat. In addition to the response time of 10 ms at room temperature, we have obtained the R-squared and the adjusted R-squared as a measure of true sine wave for the sinusoidal responding transmissions from 1 Hz to 100 kHz that are all greater than 0.9993. In a Michelson interferometer, the phase shift at wavelength 633 nm after two passes has been measured to be equal to about 𝜋/9 at 4.6 V/µm for the chiral-doped nematic mixtures E7.

Citation

Yip, W. C., Welch, C., Mehl, G. H., & Wilkinson, T. D. (2020). Analog modulation by the flexoelectric effect in liquid crystals. Applied optics, 59(9), 2668-2673. https://doi.org/10.1364/AO.386096

• Journal Article Type: Article
• Acceptance Date: Jan 28, 2020
• Online Publication Date: Jan 29, 2020
• Publication Date: Mar 20, 2020
• Deposit Date: Dec 8, 2020
• Publicly Available Date: Feb 1, 2021
• Journal: Applied Optics
• Print ISSN: 1559-128X
• Publisher: Optica
• Peer Reviewed: Peer Reviewed
• Volume: 59
• Issue: 9
• Pages: 2668-2673
• DOI: https://doi.org/10.1364/AO.386096
• Keywords: Atomic and Molecular Physics, and Optics
• Public URL: https://hull-repository.worktribe.com/output/3469620
• Publisher URL: https://www.osapublishing.org/ao/abstract.cfm?uri=ao-59-9-2668
• Related Public URLs: https://www.repository.cam.ac.uk/handle/1810/303703
• Additional Information: This article is maintained by: OSA - The Optical Society; Crossref DOI link to publisher maintained version: https://doi.org/10.1364/AO.386096; Article type: research-article; Similarity check: Screened by Similarity Check; Peer reviewed: Yes; Review process: Single blind; Received: 18 December 2019; Accepted: 28 January 2020; Published: 12 March 2020; Copyright: © 2020 Optical Society of America