from UMI in association with The British Library. Requires signed TDF. Photorefractive
crystals are materials whose index of refraction is altered under illumination by light. These
crystals are both photoconductive and electrooptic. When a nonuniform light intensity pattern
is present in the material, photocarriers are generated and redistributed, creating space
charge electrical fields which change the refractive index locally. These crystals are ideal …