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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 14, Iss. 10 — Oct. 1, 1997
  • pp: 2498–2504

Relaxation process of holographic gratings in amorphous As2S3 films

Janis Teteris and Olli Nordman  »View Author Affiliations


JOSA B, Vol. 14, Issue 10, pp. 2498-2504 (1997)
http://dx.doi.org/10.1364/JOSAB.14.002498


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Abstract

A detailed study of the relaxation self-enhancement (RSE) of the holographic gratings in amorphous As2S3 films is presented. The changes of the diffraction efficiency have been measured as functions of the aging time and the recording light intensity. The role of the internal mechanical stress of the films in the self-enhancement phenomenon has been discussed.It is shown that the RSE has a vectorial character owing to the uniaxial periodically distributed stress relaxation. A model based on the photoinduced stress relaxation and viscous flow of amorphous film is proposed to explain the experiments qualitatively. It is further shown that the stress-induced optical anisotropy of the films is responsible for the RSE.

© 1997 Optical Society of America

Citation
Janis Teteris and Olli Nordman, "Relaxation process of holographic gratings in amorphous As2S3 films," J. Opt. Soc. Am. B 14, 2498-2504 (1997)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-14-10-2498

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