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Information × Registration Number 0224U002163, 0122U000951 , R & D reports Title Synthesis and research of crystalline nanostructured materials as an innovative technological product popup.stage_title Head Andrushchak Anatolii S., Доктор технічних наук Registration Date 06-02-2024 Organization Lviv Polytechnic National University popup.description2  The work includes a wide range of chemical and technological, experimental physical and computer studies. The optimal technological regimes for creating a number of nanocomposite materials based on porous matrices Si, SiO2 Al2O3 and filling crystals KH2PO4, NH4H2PO4, LiNbO3, Ba(NO3)2, (C6H5CO)2, etc. were studied and selected. As a result of X-ray structural and spectroscopic studies, it is shown that nano-sized crystals of the corresponding macroscopic compounds are indeed formed in the thickness of the indicated matrices. First-principle calculations of lattice dynamics of filling crystals helped to interpret complex spectroscopic data of composite materials and to investigate the influence of the effect of spatial confinement. It turned out that nanocomposites, in which the filling crystal is a nonlinear optical crystal, can be effective and simple in creating nonlinear optical converters of the frequency of optical radiation. The effects of spatial confinement of the crystals filled with the parent matrix are experimentally recorded, but they are significant only in the nonlinear optical properties of the specified composites. With the help of theoretical analysis, optimal geometries of vector phase synchronism for uniaxial nonlinear optical crystals KDP, ADP and LiNbO3 were established for the cases of generation of the second harmonic, sum and difference frequency. We have developed a technology for obtaining structures with an ultra-low reflection coefficient of electromagnetic radiation in the wavelength range of 1.0÷10.0 μm, created a model of such a structure and conducted its testing. Product Description popup.authors Adamiv Volodymyr T. Afanasiev Denys M. Bendak Andrii V. Vynnyk Dmytro M. Danylov Andrii B. Klym Halyna I. Ratych Andrii T. Rybytska Olha M. Tecliuk Ihor M. Shvets Roman Ya. Shchur Yaroslav Yo. popup.nrat_date 2024-02-06 Close