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Optics Letters

Optics Letters


  • Vol. 24, Iss. 19 — Oct. 1, 1999
  • pp: 1349–1351

Photoinduced orientation of azo dye in various polymer matrices

P.-A. Blanche, Ph. C. Lemaire, M. Dumont, and M. Fischer  »View Author Affiliations

Optics Letters, Vol. 24, Issue 19, pp. 1349-1351 (1999)

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Photoinduced dichroism in various polymers containing the same azo dye has been studied. “Angular hole burning” and molecular reorientation have been identified by analysis of dichroism dynamics at various probe wavelengths. The glass-transition temperature Tg is of major relevance for the reorientation of optically active molecules. For low Tg (below ambient temperature) thermal diffusion impedes anisotropy buildup. For higher Tg the angular distribution induced by the polarized pump beam is frozen. We propose a simple model based on diffusion rates in trans and cis molecules.

© 1999 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(160.4890) Materials : Organic materials

P.-A. Blanche, Ph. C. Lemaire, M. Dumont, and M. Fischer, "Photoinduced orientation of azo dye in various polymer matrices," Opt. Lett. 24, 1349-1351 (1999)

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  1. P. S. Ramanujam, N. C. R. Holme, L. Nikolova, R. H. Berg, S. Hvilsted, E. T. Kristensen, C. Kulinna, A. B. Nielsen, and M. Pedersen, Proc. SPIE 3011, 319 (1997).
  2. P.-A. Blanche, Ph. C. Lemaire, C. Maertens, P. Dubois, and R. Jérôme, Polym. Eng. Sci. 38, 3 (1998).
  3. P.-A. Blanche, Ph. C. Lemaire, C. Maertens, P. Dubois, and R. Jérôme, Proc. SPIE 3417, 131 (1998).
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  8. C. Maertens, P. Dubois, R. Jérôme, P.-A. Blanche, and Ph. C. Lemaire, “Dynamics of the photoinduced orientation and relaxation of new polymethacrylates containing carbazolyl and azobenzene pendant groups,” Polym. Int. (to be published).
  9. A. E. Osman and M. Dumont, Proc. SPIE 3417, 36 (1998).
  10. M. Dumont, S. Hosotte, G. Froc, and Z. Sekkat, Proc. SPIE 2042, 2 (1993).
  11. M. Dumont and A. E. Osman, “On spontaneous and photoinduced orientational mobility of dye molecules in polymers,” Chem. Phys. (to be published).

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