Mechanisms connected with a new diffraction order formation in surface-relief gratings

摘要

This contribution concentrates on modeling of diffraction processes in surfacerelief gratings, occurring particularly within resonant regions. The resonant regions are characterized by strong energy interchange processes (since new diffraction orders starts to become propagating), the diffraction efficiency behavior within such a region is described and interpreted. Two main sub-regions of resonant regions are found: (1) the region with effective behavior - "mound" and (2) the region with resonant coupling. The conditions for the existence of the first sub-region are presented and explained.