Ross, G.W., Jeffrey, P.M., Eason, R.W., Damzen, M.J., Garcia, R.R., Troth, R., Garrett, M.H. and Rytz, D.
Shallow trap modelling of infrared sensitive BaTiO3
At CLEO Europe: Conference on Lasers & Electro-Optics Europe, Netherlands.
28 Aug - 02 Sep 1994.
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We present experimental data for the intensity-dependent absorption coefficient of a photorefractive "blue" sample of rhodium-doped BaTiO3 using beams of different wavelengths. A numerical photorefractive two-level model incorporating dual-wavelength illumination and a secondary photorefractive centre gives good agreement with experiment. We deduce values for the number densities, photoionisation cross-sections, thermal ionisation rate and recombination coefficients of the photorefractive centres. In this sample we determine that there is the usual deep trap concentration of ~ 2x10.
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