Explanation

electro-optical materials with refractive index change caused by light. This kind of materials can absorb foreign photons and generate charge migration (drift, diffusion, jump, etc.) in the medium. The change of charge distribution forms a space charge field, and then the refractive index is modulated through the electrophoto effect. The necessary condition for generating photorefractive effect is that the medium has absorption of light, and there is S in the medium due to charge and the medium has a non-zero electro-optic coefficient.

Classification