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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 15 — Jul. 23, 2007
  • pp: 9273–9280

Periodic structures generated by light in chiral liquid crystals

U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, and T. J. Bunning  »View Author Affiliations

Optics Express, Vol. 15, Issue 15, pp. 9273-9280 (2007)

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We discuss materials that reveal fundamental intercoupling of light and chirality in creation of complex structures. These materials are based on cholesteric liquid crystals (CLCs) photosensitized by azobenzene nematics. Transformation of the one-dimensional periodic structure of such CLCs into complex spatial patterns takes place on macroscopic scales, over the whole area of the CLC layer, under the influence of low power radiation including LED, ambient illumination, and sunlight. The obtained structures, with their origin in the strain of the CLC layers caused by trans-cis photoisomerization precede a shift in the bandgap position of the CLCs. The effect is observed both in red-shifting as well as blue-shifting CLCs.

© 2007 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(190.4400) Nonlinear optics : Nonlinear optics, materials
(260.5130) Physical optics : Photochemistry

ToC Category:

Original Manuscript: May 16, 2007
Revised Manuscript: July 2, 2007
Manuscript Accepted: July 5, 2007
Published: July 12, 2007

U. A. Hrozhyk, S. V. Serak, N. V. Tabiryan, and T. J. Bunning, "Periodic structures generated by light in chiral liquid crystals," Opt. Express 15, 9273-9280 (2007)

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