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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. 2 — Feb. 1, 1998
  • pp: 577–585

Temporal memory effects in photorefractive two-beam coupling: a study comparing n-doped and p-doped BaTiO3 at 514 nm and 830 nm

David Statman, Charles C. Stefanini, Melissa M. Statman, and G. Charmaine Gilbreath  »View Author Affiliations


JOSA B, Vol. 15, Issue 2, pp. 577-585 (1998)
http://dx.doi.org/10.1364/JOSAB.15.000577


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Abstract

The photorefractive gain and time response of n-doped and p-doped BaTiO3 were compared in the visible, λ=514 nm, and in the infrared, λ=830 nm. Two-beam coupling experiments were conducted for beam ratios between 3600:1, 5000:1, and 8000:1. In both infrared and visible it was observed that the measured gains were higher for the p-BaTiO3 by an order of magnitude or more. When the gain was high, a temporal memory effect was observed, suggesting that the time dependence of the space-charge field is determined by the history of the modulation depth. This effect is shown to be consistent with the Kukhtarev equations for a single carrier. Low-gain behavior was observed at all interaction angles for both crystals in the IR. In the visible the high-gain temporal memory effect is reported for the p-BaTiO3.

© 1998 Optical Society of America

OCIS Codes
(090.7330) Holography : Volume gratings
(160.5320) Materials : Photorefractive materials
(190.0190) Nonlinear optics : Nonlinear optics
(190.4720) Nonlinear optics : Optical nonlinearities of condensed matter
(190.5330) Nonlinear optics : Photorefractive optics
(190.7070) Nonlinear optics : Two-wave mixing

Citation
David Statman, Charles C. Stefanini, Melissa M. Statman, and G. Charmaine Gilbreath, "Temporal memory effects in photorefractive two-beam coupling: a study comparing n-doped and p-doped BaTiO3 at 514 nm and 830 nm," J. Opt. Soc. Am. B 15, 577-585 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-2-577

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