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Information × Registration Number 0219U003519, 0116U000817 , R & D reports Title Intracavity methods for generating of terahertz laser radiation with inhomogeneous polarization state and its diagnostics. popup.stage_title Head Maslov Vyacheslav Aleksandrovich, Registration Date 17-01-2019 Organization Kharkov National University named after V.N. Karazin popup.description2 Object of research: physical processes of propagation, transformation and diagnostics of wave beams with a nonuniform spatial polarization of radiation generated in quasi-optical laser resonators in the terahertz range. The purpose of research the creation of new and effective methods of forming intracavity continuous-wave laser beams with a nonuniform spatial polarization and methods of their diagnostics in the terahertz spectral range. Methods of research: method of finite differences in the time domain for bodies of revolution; matrix method; parameter measurement method of spatial polarizations using matrix receivers with polarizers. A method of forming a separate transverse mode with azimuthal polarization of the field in a quasi-optical laser resonator of the terahertz range using polarization-selective large-scale and small-scale diffraction gratings as heterogeneous mirrors of both transmission and reflected types was first proposed, theoretically substantiated and experimentally confirmed. A new method for measuring the space-energy and polarization characteristics of radiation is proposed. The experimental sample of a matrix receiver was designed and created for measuring parameters of spatial polarization of radiation, and the algorithm of signal processing from a matrix receiver was developed. The results of the research can be used to solve problems related to the interaction of electromagnetic waves with matter: in the diagnostics of the surface of materials, thin films, biological objects, THZ systems of transmission and processing of information, excitation of ring resonators from metamaterials. Product Description popup.authors І. Приз А. Дегтярьов В. Маслов В. Рябих В. Сенюта М. Кокодій О. Анікеєв О. Гурін Ю. Шевирьова popup.nrat_date 2020-04-02 Close