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.
https://hal-iogs.archives-ouvertes.fr/hal-01617416
Contributeur : Fatima Pereira
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Soumis le : lundi 16 octobre 2017 - 15:24:01
Dernière modification le : mardi 24 avril 2018 - 15:32:31
