GENERATION OF SQUEEZED WAVES DURING EXCITATION OF SURFACE ELECTROMAGNETIC-WAVES ON A BOUNDED GRATING

In a series of experimental papers on the excitation of surface electromagnetic waves on bounded diffraction gratings, radiations have been observed traveling predominantly at small angles to the surface. Such waves have been named squeezed waves. This paper considers the nature of squeezed waves. It is shown that not only evanescent waves but also volume waves that form a squeezed wave are excited on a bounded grating. It is also shown that the volume radiation experimentally detected earlier and coming from a smooth section of the surface is a squeezed wave propagating at comparatively large angles.