21 August 2009 Combined optical and electrical effects in ferroelectric crystal for high laser intensities
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Abstract
In this study, we have derived equations for the pyroelectric and photogalvanic contribution to the electrical charging of the photosensitive ferroelectric crystal. Standard photorefractive equations are supplemented by the equation of state for the polarization density following the Devonshire-Ginsburg-Landau (DGL) approach. The photogalvanic voltage and current is considered for a wide intensity range, which includes the CW and the pulsed photo-excitation with high intensities when the impurity is fully ionized and when the traditional linear-recombination approach is not valid. The crystal electrostatic accelerators, based on charging of ferroelectric crystals by pyroelectric and photogalvanic effects, are discussed in relation to the generation of the self-focused electron beam, X-rays, and neutrons.
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N. V. Kukhtarev, T. V. Kukhtareva, G. Stargell, J. C. Wang, "Combined optical and electrical effects in ferroelectric crystal for high laser intensities", Proc. SPIE 7420, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications III, 74200L (21 August 2009); doi: 10.1117/12.825737; https://doi.org/10.1117/12.825737
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