Alternative (nondiffraction) methods for the characterization of photorefractive crystals, namely, a stationary holographic current and non-steady-state photo-emf are considered. The sign of the dominating photocarriers, their average lifetimes and transport lengths, the characteristic time for hologram formation, and concentration of trapping centers were estimated for BSO and GaAs:Cr crystals. These novel techniques can be used for the characterization of centrosymmetric photoconductive crystals as well.
© 1992 Optical Society of America
Original Manuscript: June 26, 1990
Revised Manuscript: July 1, 1991
Published: January 1, 1992
I. A. Sokolov, S. I. Stepanov, and G. S. Trofimov, "Holographic currents and the non-steady-state photoelectromotive force in cubic photorefractive crystals," J. Opt. Soc. Am. B 9, 173-176 (1992)