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Nonspecular astigmatic reflection of a 3D gaussian beam on an interface

Abstract : We extend a recently proposed approach of the study of nonspecular effects to 3D finite beams. It is shown that a new nonspecular effect appears in 3D: the two beam waist in the two transverse directions across the beam are different and their longitudinal positions are different. In other words a plane interface is an astigmatic system for a finite beam. The effect is illustrated by studying the nonspecular effects for the zero order diffracted beam by a grating. It is shown that this system produces strong nonspecular effects due to the efficient coupling of leaky waves near the total absorption regime.
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Submitted on : Monday, October 16, 2017 - 3:24:01 PM
Last modification on : Friday, July 3, 2020 - 9:28:03 AM

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Jean-Jacques Greffet, Christophe Baylard. Nonspecular astigmatic reflection of a 3D gaussian beam on an interface. Optics Communications, Elsevier, 1992, 93 (5-6), pp.271 - 276. ⟨10.1016/0030-4018(92)90184-S⟩. ⟨hal-01617416⟩

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