Abstract

A complete set of charge-transport parameters of photorefractive cerium-doped strontium-barium niobate crystals is determined: the concentrations of filled and empty traps, the photon-absorption cross section, the quantum efficiency for excitation of an electron upon absorption of a photon, the recombination coefficient, and the charge-carrier mobility. These parameters are obtained evaluating optical absorption, conductivity, non-steady-state photocurrents, neutron-activation analysis, and x-ray photoelectron spectra. The effective absorption radius of the filled electron traps is small and the effective trapping radius is large compared with the ionic radii. Before recombination with deep levels the excited electrons are trapped several times by shallow levels. A detailed description of the charge transport is obtained, and the properties of optimized crystals are deduced.

© 1998 Optical Society of America

Hall measurements with photorefractive strontium barium niobate by application of a non-steady-state photocurrent method

A. Gerwens, K. Buse, E. Krätzig, N. Korneev, and S. Stepanov
J. Opt. Soc. Am. B 15(7) 2143-2146 (1998)

Effects of heat treatment with quenching on photorefractive properties of cerium- and europium-doped strontium barium niobate

Tadayuki Imai, Shogo Yagi, Hiroki Yamazaki, and Michio Ono
J. Opt. Soc. Am. B 15(7) 2161-2168 (1998)

Enhanced photorefractive effects of cerium-doped lead barium niobate crystals

Alice Liu, Myeongkyu Lee, and Lambertus Hesselink
J. Opt. Soc. Am. B 17(4) 542-547 (2000)

Large photorefractive coupling coefficient in a thin cerium-doped strontium barium niobate crystal

R. A. Vazquez, F. R. Vachss, R. R. Neurgaonkar, and M. D. Ewbank
J. Opt. Soc. Am. B 8(9) 1932-1941 (1991)

Light-induced absorption of cerium-doped lead barium niobate crystals

Alice Liu, Myeongkyu Lee, Lambertus Hesselink, Sang-Heun Lee, and Ki-Soo Lim
Opt. Lett. 23(20) 1618-1620 (1998)