2001/01/01 by D. K. Gramotnev, Dmitri K. Gramotnev, T. A. Nieminen +1
Engineering · Physics and Astronomy · #Photonic Crystals and Applications #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #physics.optics
paper · pdf · doi:10.1023/a:1007019621419
published as Optical and Quantum Electronics 33, 1-17 (2001) · 8 pages, 5 figures
openalex publication_date 2001/01/01 · arxiv created 2003/10/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Two strong simultaneous resonances of scattering--double-resonant extremely asymmetrical scattering (DEAS)--are predicted in two parallel, oblique, periodic Bragg arrays separated by a gap, when the scattered wave propagates parallel to the arrays. One of these resonances is with respect to frequency (which is common to all types of Bragg scattering), and another is with respect to phase variation between the arrays. The diffractional divergence of the scattered wave is shown to be the main physical reason for DEAS in the considered structure. Although the arrays are separated, they are shown to interact by means of the diffractional divergence of the scattered wave across the gap from one array into the other. It is also shown that increasing separation between the two arrays results in a broader and weaker resonance with respect to phase shift. The analysis is based on a recently developed new approach allowing for the diffractional divergence of the scattered wave inside and outside the arrays. Physical interpretations of the predicted features of DEAS in separated arrays are also presented. Applicability conditions for the developed theory are derived.