Polarization anisotropy, photorefraction

Electro-Optic and Electric-Field-Induced Birefringent Materials. As can be seen from the analysis of The Photorefractive Process section, one material parameter to be optimized is the electro-optic and orientational response. This can be accomplished either by finding compatible materials with large linear electro-optic coefficients or by optimizing the orientational effects using materials with large birefringence (polarization anisotropy). One major difference in these approaches is the response speed of the photorefractive effect in that the orientational approach is expected to be slower, but submillisecond responses of low Tg materials have been demonstrated (93-96). 

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