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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 20, Iss. 3 — Mar. 1, 2003
  • pp: 538–544

Photoinduced critical opalescence and reversible all-optical switching in photosensitive liquid crystals

Nelson V. Tabiryan, Svetlana V. Serak, and Vladimir A. Grozhik  »View Author Affiliations


JOSA B, Vol. 20, Issue 3, pp. 538-544 (2003)
http://dx.doi.org/10.1364/JOSAB.20.000538


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Abstract

We present the results of a study of the critical opalescence that is observed as a result of reversible trans–cis photoisomerization in the vicinity of photoinduced isothermal phase transitions in azobenzene liquid crystals (azo LCs). The opalescence is caused by the generation of randomly oriented microdomains and microdroplets of isotropic phase in the illuminated area of the azo LC. Transformations between the strongly light-scattering nematic phase and the transparent isotropic phase of the azo LC are induced all-optically by combination of green (λ=532nm) and violet (λ=409nm) laser beams.

© 2003 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.0190) Nonlinear optics : Nonlinear optics
(210.4770) Optical data storage : Optical recording
(260.5130) Physical optics : Photochemistry
(290.0290) Scattering : Scattering

Citation
Nelson V. Tabiryan, Svetlana V. Serak, and Vladimir A. Grozhik, "Photoinduced critical opalescence and reversible all-optical switching in photosensitive liquid crystals," J. Opt. Soc. Am. B 20, 538-544 (2003)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-20-3-538


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