Abstract

Several recent observations in photorefractive materials^1-3 cannot be explained by the single-level single-charge carrier model developed by Kukhtarev. These include the observation of erase rates and photoconductivities that depend on I^x, where 0 < x < 1,¹ erase time dependence that cannot be fitted with a single rate,² and annealing to change the dominant charge carrier from holes to electrons.³ Simultaneous electron and hole transport is investigated to understand whether these observations can be fitted by this model.

© 1985 Optical Society of America