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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 21 — Oct. 13, 2008
  • pp: 16923–16934

Anisotropic diffraction from photorefractive gratings and Pockels tensor of Sn2P2S6

Alexandr Volkov, Alexandr Shumelyuk, Serguey Odoulov, Dean R. Evans, and Gary Cook  »View Author Affiliations

Optics Express, Vol. 16, Issue 21, pp. 16923-16934 (2008)

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The first observation of anisotropic diffraction and anisotropic self diffraction in low symmetry photorefractive crystal Sn2P2S6 is reported. From comparison of the diffraction efficiency of isotropic and anisotropic diffraction the ratios of the Pockels tensor components are deduced, including some nondiagonal components that have never been evaluated until now. The particular orientation of the optical indicatrix in Sn2P2S6 (roughly at 45° to z- and x-axes at ambient temperature) has a paradoxical consequence: The efficiency of anisotropic diffraction depends solely on diagonal components of the Pockels tensor, while the efficiency of the isotropic diffraction is considerably affected by nondiagonal components. With already known results and data presented in this article we can state that all 10 nonvanishing Pockels tensor components of the m-symmetry class crystal like Sn2P2S6 do manifest themselves in various types of nonlinear wave mixing.

© 2008 Optical Society of America

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(160.2100) Materials : Electro-optical materials
(190.4380) Nonlinear optics : Nonlinear optics, four-wave mixing
(190.5330) Nonlinear optics : Photorefractive optics

ToC Category:
Nonlinear Optics

Original Manuscript: August 21, 2008
Revised Manuscript: September 15, 2008
Manuscript Accepted: September 15, 2008
Published: October 8, 2008

Serguey Odoulov, Alexandr Volkov, Alexandr Shumelyuk, Dean R. Evans, and Gary Cook, "Anisotropic diffraction from photorefractive gratings and Pockels tensor of Sn2P2S6," Opt. Express 16, 16923-16934 (2008)

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  1. A. Grabar, M. Jazbinšek, A. Shumelyuk, Yu.M. Vysochanskii, G. Montemezzani, and P. Günter, "Photorefractive effects in Sn2P2S6," in Photorefractive materials and their applications 2, P. G¨unter, and J.-P. Huignard, eds. (Springer-Verlag, 2007), pp. 327-362. [CrossRef]
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  20. A. Shumelyuk, A. Volkov, A. Selinger, M. Imlau, and S. Odoulov, "Frequency-degenerate nonlinear light scattering in low-symmetry crystals," Opt. Lett. 353, 151-153 (2008). [CrossRef]
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