2012/05/29 by V.G. Baryshevsky, V. G. Baryshevsky, Baryshevsky, V. G. +3
Engineering · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #Optical and Acousto-Optic Technologies #Optics (physics.optics) #Photonic Crystals and Applications #Photonic and Optical Devices #physics.acc-ph #physics.optics
paper · pdf · doi:10.48550/arxiv.1205.6318
arxiv created 2012/05/29 · openalex publication_date 2012/05/29 · arxiv updated 2012/05/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Refraction and diffraction of waves in natural crystals and artificial crystals formed by anisotropically scattering centers are considered. A detailed study of the electromagnetic wave refraction in a two-dimensional photonic crystal formed by parallel threads is given by way of example. The expression is derived for the effective amplitude of wave scattering by a thread (in a crystal) for the case when scattering by a single thread in a vacuum is anisotropic. It is established that for a wave with orthogonal polarization, unlike a wave with parallel polarization, the index of refraction in crystals built from metallic threads can be greater than unity, and Vavilov-Chrernkov radiation becomes possible in them. The set of equations describing the dynamical diffraction of waves in crystals is derived for the case when scattering by a single center in a vacuum is anisotropic. Because a most general approach is applied to the description of the scattering process, the results thus obtained are valid for a wide range of cases without being restricted to either electromagnetic waves or crystals built from threads.