S. Sochava et al., CHARACTERIZATION OF PHOTOREFRACTIVE KNBO3FE BY NON-STEADY-STATE PHOTOCURRENT TECHNIQUES, Optics communications, 105(5-6), 1994, pp. 315-319
Non-steady-state photocurrent measurements are carried out with a n-ty
pe photorefractive KNbO3:Fe crystal at the light wavelength 488 nm. Sp
atial frequency dependent measurements yield the effective trap densit
y. From the dielectric relaxation time for different crystal orientati
ons we deduce the mobility ratios for charge carrier migration paralle
l to the a-, b- and c-axis.