Beam-Wave Phenomena and Interactions with Planar Configurations

该研究计划将调查一般电磁 由分层或周期性散射的光束引起的问题 边界，特别注意几个特殊的影响， 直到最近才被认识到，即：出乎意料的大 横向、焦点和角度光束偏移，以及 束腰及其强度分布的畸变。 这些非- 当入射场耦合时，镜面反射现象最明显 能量转换成由散射结构引导的波。 的相互作用 因此将详细地探索波束和导波之间的关系， 一种新颖的方法被用来检查色散特性， 散射结构的特性 （表面、泄漏等）modes. 具体的相关问题将 解决，如：非镜面效果的影响，以及 加强这些效果的措施。 结果特别 与涉及控制和操纵的工程领域相关 良好的约束束场，具有潜在的应用， 集成光学、超声波和微波声学。

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.