Conditions for the formation of a uniformly lying helix structure induced by the electrohydrodynamic effect

Yu Lin Nian, Po Cheng Wu, Wei Lee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The uniform lying helix (ULH) structure in a cholesteric liquid crystal (CLC) cell has been widely discussed in the literature. Based on the electrohydrodynamic (EHD) effect, we have suggested that the voltage-induction of a wellaligned ULH state can be fine-Tuned in a CLC cell by optimizing both the amplitude and the frequency of the applied voltage. However, since the EHD effect is correlated with the migration of mobile ions within the bulk of the cell, the ionic conditions for such an EHD-induced ULH state have not been clarified. In this research, we focus on studying the influence of ion density and the diffusivity on the formation of the EHD-induced ULH structure in a CLC cell, followed by finding out some key conditions for the generation of well-Aligned ULH states.

Original languageEnglish
Title of host publicationLiquid Crystals XXI
EditorsIam Choon Khoo
PublisherSPIE
ISBN (Electronic)9781510611795
DOIs
StatePublished - 1 Jan 2017
EventLiquid Crystals XXI 2017 - San Diego, United States
Duration: 6 Aug 20177 Aug 2017

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10361
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceLiquid Crystals XXI 2017
CountryUnited States
CitySan Diego
Period6/08/177/08/17

Keywords

  • Cholesteric liquid crystals
  • Diffusivity
  • Electrohydrodynamic effect
  • Ion density
  • Uniform lying helix

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