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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 15, Iss. 3 — Mar. 1, 1998
  • pp: 1120–1129

Theoretical model of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters

Thomas Garm Pedersen, Per Michael Johansen, Niels Christian Rømer Holme, P. S. Ramanujam, and Søren Hvilsted  »View Author Affiliations


JOSA B, Vol. 15, Issue 3, pp. 1120-1129 (1998)
http://dx.doi.org/10.1364/JOSAB.15.001120


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Abstract

A theoretical framework for the temporal behavior of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters is constructed. The domain structure of the material is taken into account and intermolecular interactions are included through a mean-field description. Photoinduced transcis isomerization is taken as the dominating source of chromophore reorientation events, and it is demonstrated how this mechanism in conjunction with the multidomain picture is able to account for the long-term stability of the anisotropy. The photoinduced birefringence is calculated by means of a truncated basis method, and in addition the photostationary solution is obtained. Comparison between theory and experiment shows excellent agreement in the entire range of intensities used experimentally.

© 1998 Optical Society of America

OCIS Codes
(160.3710) Materials : Liquid crystals
(160.5470) Materials : Polymers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(210.4810) Optical data storage : Optical storage-recording materials

Citation
Thomas Garm Pedersen, Per Michael Johansen, Niels Christian Rømer Holme, P. S. Ramanujam, and Søren Hvilsted, "Theoretical model of photoinduced anisotropy in liquid-crystalline azobenzene side-chain polyesters," J. Opt. Soc. Am. B 15, 1120-1129 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-3-1120

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