NONSPECULAR ASTIGMATIC REFLECTION OF A 3D GAUSSIAN-BEAM ON AN INTERFACE

被引:29
作者
GREFFET, JJ
BAYLARD, C
机构
[1] Laboratoire d'Energétique Moléculaire et Macroscopique, Combustion, Ecole Centrale Paris, 92295 Châtenay-Malabry, Grande voie des Vignes
关键词
D O I
10.1016/0030-4018(92)90184-S
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
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.
引用
收藏
页码:271 / 276
页数:6
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