Diffraction efficiency is sensitive to incident angles, crystal thickness and applied electric field. A small change of these factors may bring a great difference of the diffraction efficiency.
衍射效率对入射角、晶体厚度以及外加电场的变化敏感，其中任一个参数的较小改变都可以引起衍射效率的较大变化。
This method is applied to calculate the diffraction efficiencies accurately for arbitrary grating profiles, incident angles, substrate indexes and wavelengths in the same order of grating period.
这种方法适用于光栅周期处于波长量级、任意光栅轮廓及倾斜入射时的精确衍射效率计算。
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