Abstract

A two-center photorefractive model permitting all center-to-band transitions and electron–hole charge transport unifies several models describing subsets of these transitions. Using the quasi-steady-state approximation for low continuous-wave illumination, the model derives the first-order Fourier harmonic of the steady-state space-charge distribution and fields and the corresponding response rates. The model describes electron–hole competition, complementary gratings, double-exponential time-dependent behavior, and nonlinear dependence of response rates on intensity. The model can be used to make new predictions of photorefractive behavior of crystals in which two species of impurity center are present; an example is presented for BaTiO₃.

© 1994 Optical Society of America

Comparison of single- and two-species models of electron–hole transport in photorefractive media

M. C. Bashaw, T.-P. Ma, and R. C. Barker
J. Opt. Soc. Am. B 9(9) 1666-1672 (1992)

Resonant two-photon processes for nonvolatile holography in photorefractive crystals under continuous-wave illumination

Loukas Paraschis, Matthew C. Bashaw, Alice Liu, and Lambertus Hesselink
J. Opt. Soc. Am. B 14(10) 2670-2680 (1997)

Theory of complementary holograms arising from electron–hole transport in photorefractive media

M. C. Bashaw, T.-P. Ma, R. C. Barker, S. Mroczkowski, and R. R. Dube
J. Opt. Soc. Am. B 7(12) 2329-2338 (1990)

Diffraction from thermally fixed gratings in a photorefractive medium: steady-state and transient analysis

M. Jeganathan and L. Hesselink
J. Opt. Soc. Am. B 11(9) 1791-1799 (1994)

Quasi-stabilized ionic gratings in photorefractive media for multiplex holography

Matthew C. Bashaw and John F. Heanue
J. Opt. Soc. Am. B 14(8) 2024-2042 (1997)