Pseudo-dielectric relaxation-enabled electrothermal tuning of reflective color in a soft chiral photonic crystal

Po Chang Wu, Guan Wei Wu, Wei Lee*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Many published papers bear flaw information caused by misinterpreting the pseudo-dielectric relaxation in liquid crystal (LC) confined in thin cells. The pseudo-dielectric relaxation stems from the cell geometries or parameters, which should not be misrecognized as an inherent material property of the LC. In this work, we explored the pseudo-dielectric relaxation and demonstrated an unconventional tuning means to electrically manipulate the reflective color of a typical cholesteric LC cell based on the heating due to the pseudo-dielectric relaxation. A tuning range in the full-color spectrum can be easily achieved by a limited temperature change of merely a few degrees Celsius.

Original languageEnglish
Title of host publicationLiquid Crystals XXIII
EditorsIam Choon Khoo
PublisherSPIE
ISBN (Electronic)9781510628779
DOIs
StatePublished - 1 Jan 2019
EventLiquid Crystals XXIII 2019 - San Diego, United States
Duration: 11 Aug 201912 Aug 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume11092
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceLiquid Crystals XXIII 2019
CountryUnited States
CitySan Diego
Period11/08/1912/08/19

Keywords

  • Cholesteric liquid crystals
  • Color tuning
  • Pseudo-dielectric heating
  • Pseudo-dielectric relaxation

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  • Cite this

    Wu, P. C., Wu, G. W., & Lee, W. (2019). Pseudo-dielectric relaxation-enabled electrothermal tuning of reflective color in a soft chiral photonic crystal. In I. C. Khoo (Ed.), Liquid Crystals XXIII [1109202] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11092). SPIE. https://doi.org/10.1117/12.2526099