Surface evanescent field characterisation of antiferroelectric liquid crystals

B. Beccherelli, L.A. Judge, N.J. Mottram, S.J. Elston

Research output: Contribution to journalArticle

Abstract

In this paper we report a study of the dynamics of antiferroelectric liquid crystals by using simultaneous total internal reflection and transmission. In devices having both substrates coated with a polyimide, but only one rubbed, we found that the optic axis of the liquid crystal region close to the unrubbed substrate deviates from the rubbing direction less than the bulk. In switching experiments we find that this region is also slower then the bulk and it is virtually free from the undesired pretransitional effect. We also found an asymmetry in the switching of the surface region and we use a simple model to account for it.
Original languageEnglish
Pages (from-to)263-274
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume358
Issue number1
DOIs
Publication statusPublished - 2001

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Keywords

  • antiferroelectric liquid crystals
  • total internal reflection
  • surface evanescent field
  • high quality alignment
  • liquid crystals

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