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.
© 2012 Optical Society of America
Diffraction and Gratings
Original Manuscript: April 11, 2012
Manuscript Accepted: April 20, 2012
Published: June 12, 2012
Stéphane Larouche and David R. Smith, "Reconciliation of generalized refraction with diffraction theory," Opt. Lett. 37, 2391-2393 (2012)