Use of mirage effect for the detection of phase transitions in liquid crystals

K. Rajasree*, V. Vidyalal, P. Radhakrishnan, V. P.N. Nampoori, C. P.G. Vallabhan, A. K. George

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

The phenomenon of single beam mirage effect, otherwise known as photothermal deflection (PTD) effect using a He-Ne laser beam has been employed to detect phase transitions in some liquid crystals. It has been observed that anomalous changes in amplitude occur in the PTD signal level near the transition temperature. The experimental details and the results of measurements made in liquid crystals E8, M21 and M24 are given in this paper.

Original languageEnglish
Pages (from-to)76-80
Number of pages5
JournalMaterials Letters
Volume36
Issue number1-4
DOIs
Publication statusPublished - Jul 1998

Keywords

  • Liquid crystals
  • Mirage effect
  • Nematic and smectic phases
  • Photothermal deflection

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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