广义折射与衍射理论的调和
Reconciliation of generalized refraction with diffraction theory
摘要：
当电磁波倾斜地入射在具有不同折射率的两个均匀介质之间的界面上时，跨越界面的相位连续性的要求通常导致波的轨迹的偏移。当在界面处施加线性位置相关相移时，可以使用斯涅耳定律的广义版本来描述所产生的折射。在这封信中，我们建立了广义折射和闪耀衍射光栅之间的形式等价关系，进一步讨论了这两种方法的相对优点。
英文摘要：
When an electromagnetic wave is obliquely incident on the interface between two homogeneous media with different refractive indices, the requirement of phase continuity across the interface generally leads to a shift in the trajectory of the wave. When a linearly position dependent phase shift is imposed at the interface, the resulting refraction may be described using a generalized version of Snell's law. In this Letter, we establish a formal equivalence between generalized refraction and blazed diffraction gratings, further discussing the relative merits of the two approaches.
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