Abstract
Many electrooptic materials exhibit the photorefractive effect in which nonuniform illumination produces a spatial variation of refractive index by the following general mechanism: (1) the incident illumination produces a nonuniform space charge by the processes of photoionization, transport, and trapping; (2) the trapped charge leads to a nonuniform internal electric field by Poisson’s equation, and finally (3) the varying electric field produces a modulation of the refractive index through the linear electrooptic effect.
© 1989 Optical Society of America
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