Nonlinear Raman spectroscopy of liquid crystals: Orientational alignment and switching behaviour in a ferroelectric liquid crystal mixture

W. J. Jones, R. Allott, J. Baran, A. Grofcsik, M. Kubinyi, M. Stanley

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Picosecond inverse Raman spectroscopy has been employed to probe the alignment behaviour and switching characteristics of a 6 μm thick ferroelectric liquid crystal based on a host mixture of fluorinated phenyl biphenyl-carboxylates and a chiral dopant. Optical bistability is observed in the Raman signal on application of dc electric fields of opposite polarity. For particular polarities of the applied field, the Raman signals display a cos4 θ dependence on the angle of rotation around the beam direction. Reorientational rate constants of 300 μs and 590 μs are observed for the aromatic core at the high-voltage limit for the rise and decay of the 1600 cm−1 Raman signal on application of a switching ac electric field.

Original languageEnglish
Pages (from-to)1025-1037
Number of pages13
JournalMolecular Physics
Volume88
Issue number4
DOIs
Publication statusPublished - Jul 1996

ASJC Scopus subject areas

  • Biophysics
  • Molecular Biology
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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