ABSTRACT
The periodic device is then studied with the differential theory, which requires using a high number of Fourier components of the field. This idea was developed in for rectangular dielectric bumps and grooves lighted in TE polarization. The images contain a mixture of topographical information, scattering effects, and variations in optical properties across the sample, and therefore proper interpretation of images depends on the knowledge of the field-surface interaction that gives rise to these features. A perfect Fresnel zone is assumed to have infinite extension along the x-direction. Stratified Fresnel linear zone plates have already attracted the interest of the theoreticians. The electromagnetic study of random rough surfaces or random media requires an analysis of a specific set of a large number of arbitrary-shaped and randomly-distributed objects, which constitute the structure. Each set is a perfectly known non-periodic object that can be studied through various approximate or rigorous methods.
