Abstract
We mix azobenzene polymer and liquid crystal incertain ratio. Then the mixture is injected into cells. Nonlinearly photoinducedbirefringence takes place when linearly polarized ultraviolet is applied with thepattern photomask covering on the cells, which results in the formation ofazobenzene polymer doped liquid crystal grating. The obtained grating ischaracterized by an optical microscope and a He–Ne laser. The results indicate thatthe samples have clear grating structure, and the diffraction efficiencies can bemodulated by electric field. The sample driving voltage is 0.6 V/μm. It islower than the driving voltage of holographic polymer dispersed liquid crystaltransmission grating and could be matched with the driving integrated circuit.
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