ISSN 0869-6632 (Print)
ISSN 2542-1905 (Online)

Free-Electron Lasers and Masers

Two-dimensional distributed feedback as a method for generation of powerful coherent radiation from spatially-extended relativistic electron beams

The purpose of the research presented in the review is to analyze a new feedback mechanism  – two-dimensional (2D) distributed feedback, and to study the possibility of using this mechanism for generation of powerful spatially-coherent radiation. Such 2D distributed feedback is implemented by applying 2D Bragg structures, which represent sections of planar or coaxial waveguides with the 2D-periodical corrugation and can be considered as an analog of the 2D photonic crystals. Methods.