运用k空间的等频率线,分析研究了单轴晶体界面上e光独特的折射行为,指出在光轴与界面具有一定夹角的情况下,当入射角小于某临界角将会发生负折射的现象.通过对晶体色散关系的分析,给出了发生负折射的角度范围与光轴倾角之间的依赖关系.对单轴晶体而言,当光轴与界面的夹角为45°时,发生负折射的入射角度范围最大.
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