Beam-Wave Phenomena and Interactions with Planar Configurations

该研究计划将研究由分层或周期边界散射的光束所引起的一般电磁问题，特别关注最近才认识到的几种特殊效应，即：出乎意料的大横向，焦点和角度光束偏移，以及光束腰的修改及其强度分布的扭曲。当入射场在散射结构的引导下将能量与波耦合时，这些非镜面现象最为明显。因此，光束和导波之间的相互作用将被详细探讨，一种原始的方法被用来根据其特征（表面，泄漏等）模式来检查散射配置的色散特性。具体的相关问题，然后将解决，如：非镜面效果的效果，并提高这些效果的程序。该结果与控制和操纵井束场的工程领域特别相关，在集成光学、超声波和微波声学方面具有潜在的应用前景。

The research program will investigate the general electromagnetic problems posed by beams scattered by stratified or periodic boundaries, with special attention to several peculiar effects that have only recently been recognized, namely: unexpectedly large lateral, focal and angular beam shifts, as well as modifications of the beam waist and distortions of its intensity profile. These non- specular phenomena are most pronounced when the incident fields couple energy to waves guided by the scattering structure. The interactions between beams and guided waves will therefore be explored in detail, an original approach being used to examine the dispersive properties of the scattering configuration in terms of its characteristic (surface, leaky, etc.) modes. Specific pertinent questions will then be addressed, such as: the effect of the non-specular effects, and procedures to enhance those effects. The results are particularly relevant to engineering areas involving the control and manipulation of well confined beam fields, with potential applications in integrated optics, ultrasonics and microwave acoutics.