INFLUENCE OF THE FINITE SIZE OF THE LIGHT SPOT ON THE LASER INDUCED REORIENTATION OF LIQUID CRYSTALS.

L. Csillag, I. Jánossy, V. F. Kitaeva, N. Kroo, N. N. Sobolev

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

The threshold intensity for the laser induced deformation of nematic liquid crystals is calculated as a function of the spot size of the illuminating beam. It is shown, that due to the small size of the light spot, the optical threshold is higher than that expected from the Fredericks threshold formula for static electric fields of infinite large dimension in the cell plane. Experimental data measured on a homeotrop OCB (octyl-cyano-byphenyl) sample fit well the theoretical curve. Results obtained on the temperature and wavelength dependence of the threshold can be interpreted on the basis of the given theory.

Original languageEnglish
Pages (from-to)125-135
Number of pages11
JournalMolecular Crystals and Liquid Crystals
Volume84
Issue number1-4
Publication statusPublished - Apr 1982

Fingerprint

SPOT (French satellite)
Liquid Crystals
Nematic liquid crystals
Liquid crystals
retraining
liquid crystals
Electric fields
Wavelength
thresholds
Lasers
lasers
Temperature
illuminating
temperature dependence
electric fields
curves
cells
wavelengths

ASJC Scopus subject areas

  • Engineering(all)

Cite this

INFLUENCE OF THE FINITE SIZE OF THE LIGHT SPOT ON THE LASER INDUCED REORIENTATION OF LIQUID CRYSTALS. / Csillag, L.; Jánossy, I.; Kitaeva, V. F.; Kroo, N.; Sobolev, N. N.

In: Molecular Crystals and Liquid Crystals, Vol. 84, No. 1-4, 04.1982, p. 125-135.

Research output: Contribution to journalArticle

Csillag, L. ; Jánossy, I. ; Kitaeva, V. F. ; Kroo, N. ; Sobolev, N. N. / INFLUENCE OF THE FINITE SIZE OF THE LIGHT SPOT ON THE LASER INDUCED REORIENTATION OF LIQUID CRYSTALS. In: Molecular Crystals and Liquid Crystals. 1982 ; Vol. 84, No. 1-4. pp. 125-135.
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