Nonlinear internal waves in shallow water have been shown to be effective ducts of acoustic energy, through theory, numerical modeling, and experiment. To date, most work on such ducting has ...

This work achieves the refraction and reflection of flexoelectric-induced directrons at interfaces. With identical physical properties of the media on both sides of the interface, as well as uniform ...

A novel reflection-reduced two-layer grating is described with nearly 100% diffraction efficiency. The efficiency of the conventional grating should be improved, or some reported high-efficiency ...