CentraleSupélec (3, rue Joliot Curie,
Plateau de Moulon,
91192 GIF-SUR-YVETTE Cedex - France)
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 Contributor : Fatima PereiraConnect in order to contact the contributor Submitted on : Monday, October 16, 2017 - 3:24:01 PM Last modification on : Friday, July 3, 2020 - 9:28:03 AM