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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 19 — Oct. 1, 2012
  • pp: 4065–4067

Self-diffraction from two-photon absorption gratings in Sn2P2S6

A. Shumelyuk, M. Imlau, V. Dieckmann, H. Badorreck, A. Grabar, and S. Odoulov  »View Author Affiliations

Optics Letters, Vol. 37, Issue 19, pp. 4065-4067 (2012)

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Self-diffraction with the appearance of higher diffraction orders is discovered when writing a grating with a single sub-100 fs pulse in a nominally undoped Sn 2 P 2 S 6 sample. The short time of grating development, dependence of diffraction efficiency on the recording light intensity, correlation of wavelength dependence of efficiency with the spectrum of the two-photon absorption (TPA) constant, and a π phase shift of the diffracted beam allow for attributing the recorded grating to a dynamic amplitude grating of TPA.

© 2012 Optical Society of America

OCIS Codes
(190.5330) Nonlinear optics : Photorefractive optics
(190.7110) Nonlinear optics : Ultrafast nonlinear optics

ToC Category:
Nonlinear Optics

Original Manuscript: June 7, 2012
Revised Manuscript: August 21, 2012
Manuscript Accepted: August 27, 2012
Published: September 24, 2012

A. Shumelyuk, M. Imlau, V. Dieckmann, H. Badorreck, A. Grabar, and S. Odoulov, "Self-diffraction from two-photon absorption gratings in Sn2P2S6," Opt. Lett. 37, 4065-4067 (2012)

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  1. A. Grabar, M. Jazbinsek, A. Shumelyuk, Yu. Vysochanskii, G. Momtemezzani, and P. Günter, in Photorefractive Materials and Their Applications 2, P. Günter and J.-P. Huignard, eds. (Springer-Verlag, 2007), pp. 327–362.
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  11. We use these notations to distinguish between “Bragg” orders (two recording beams being Bragg-matched to the fundamental grating with the grating vector K=k1−k2) and two adjacent, “non-Bragg”, orders (i.e., violating Bragg condition for fundamental grating K). Note, that the recording beams are not Bragg-matched for the grating with the doubled spatial frequency 2K, which also occurs under two-photon excitation.
  12. M. Imlau, Brüning, B. Schoke, R.-S. Hardt, D. Conradi, and C. Merschjann, Opt. Express 19, 15322 (2011). [CrossRef]

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