Charge grating decay in photorefractive crystals

Nikolay A. Gusak

doi:10.1117/12.418880

15 March 2001 Charge grating decay in photorefractive crystals

Nikolay A. Gusak

Proceedings Volume 4358, Optics of Crystals; (2001) https://doi.org/10.1117/12.418880
Event: Optics of Crystals, 2000, Mozyr, Belarus

Abstract

The equation describing the charge grating decay in the photorefractive crystals is obtained, and its solution is found as well. It is shown that the equation includes the dependence on the Maxwell relaxation time, the recombination time, the crystal temperature, the grating period, the donor and the acceptor concentrations. It is found out that the exponential charge decay in a usual sense takes place only after the lapse of time equal to the recombination time but not throughout the process. This is the principal difference of the charge grating decay from Maxwell relaxation of a single charge. The beginning of the charge grating decay process is described by Gaussian function. This function describes practically the whole decay process for large values of the recombination time. For small values of the recombination time the equation solution gives the usual exponential decay ofthe charge grating.

Citation Download Citation

Nikolay A. Gusak "Charge grating decay in photorefractive crystals", Proc. SPIE 4358, Optics of Crystals, (15 March 2001); https://doi.org/10.1117/12.418880

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