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

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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
Publication statusPublished - Jul 1998

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Keywords

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

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Rajasree, K., Vidyalal, V., Radhakrishnan, P., Nampoori, V. P. N., Vallabhan, C. P. G., & George, A. K. (1998). Use of mirage effect for the detection of phase transitions in liquid crystals. Materials Letters, 36(1-4), 76-80.