Abstract
Continuous-wave photorefractive experiments in crystals and interband photorefraction at the visible wavelengths of 514 and are presented. Two-wave mixing and Bragg diffraction measurements at show grating response times of around at moderate light intensities of , i.e., 2 orders of magnitude faster than measured in the same crystal in the conventional photorefractive regime. A large two-wave mixing gain of up to is measured, and holes are identified as dominant charge carriers for the interband photorefractive effect.
© 2006 Optical Society of America
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