Two-secondary-center modeling of photorefraction and comparison with nanosecond pulse illumination experiments in barium titanate
JOSA B, Vol. 15, Issue 7, pp. 2174-2184 (1998)
http://dx.doi.org/10.1364/JOSAB.15.002174
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Abstract
We report on the formation and subsequent dark evolution of induced absorption and photorefractive gratings produced by a high-intensity 15-ns pulse in an as-grown sample of BaTiO 3 crystal. We show that the experimentally observed multiple time constants for decay of the induced absorption and buildup of the grating in the dark can be explained and successfully simulated by a numerical model of photorefraction incorporating two secondary (hole-trapping) centers in addition to the deep level. The model also takes into account combined electron and hole photoconductivity and high-intensity illumination. We present a full description of the method of numerical solution of the zeroth (homogeneous illumination) and the first-order parameters (inhomogeneous illumination) in this model regime for either steady-state or transient pulse trains and dark-evolution conditions. 1998 Optical Society of America S0740-3224(98)00107-6
[Optical Society of America ]
OCIS Codes
(190.5330) Nonlinear optics : Photorefractive optics
(320.4240) Ultrafast optics : Nanosecond phenomena
(320.5550) Ultrafast optics : Pulses
Citation
R. Ramos-Garcia and M. J. Damzen, "Two-secondary-center modeling of photorefraction and comparison with nanosecond pulse illumination experiments in barium titanate," J. Opt. Soc. Am. B 15, 2174-2184 (1998)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-15-7-2174
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