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Information × Registration Number 0221U104487, 0119U100609 , R & D reports Title Innovative use of solid and nanocomposite materials to control a subterahertz radiation popup.stage_title Head Andrushchak Nazariy А, Кандидат технічних наук Registration Date 26-03-2021 Organization Lviv Polytechnic National University popup.description2 Made samples of nanocrystallites with a size of 25×25 mm2 and a thickness of 180-200 μm filled with KDP, ADP, and TGS crystals into their pores were made, and for the first time, the refractive index and transmission spectra of nanoporous matrix samples, pores of which are filled with these crystals in the range of 220-330 GHz (free-spaced method) and in the range of 50-1200 GHz (CWS method). The method of growth of water-soluble KDP and TGS crystals in the pores of nanoporous matrices with different pore diameters with the possibility of choosing the direction of crystal growth in the pores was adapted and verified. For the first time, based on experimental data, the refractive index and absorption coefficient for single-crystal oxide materials LiNbO3, LiTaO3, CaWO4, CaMoO4, and TeO2 in the frequency range 220-330 GHz were calculated. Besides, for the first time, measurements of the transmission of oxide materials LiNbO3, LiTaO3, CaWO4, CaMoO4, TeO2, Ge in the range of 50-1200 GHz were performed. Furthermore, for the first time, the effect of photocarriers on the transmission of fabricated samples of bismuth germanate (Bi12GeO20) was studied, and the transmission spectra of fabricated samples in the subTHz frequency range 220-330 GHz were investigated and analyzed with an evaluation of their practical use for acousto-optic control of subTHz radiation. Also, a finite-elementary model of a terahertz substrate polarizer based on a wire mesh for the 220-330 GHz band was developed using COMSOL Multiphysics, and its effectiveness for practical implementation using the investigated materials as substrates was evaluated. The developed polarizer model can be used as a ready-to-use tool for designing or improving terahertz polarizers. The obtained simulation results show good agreement with the known experimental and simulation data within 3-9% of the error. It was also researched, created a database of contacts of potential consumers of the future product, and analyzed the Product Description popup.authors Bak Roman I Kost Yaroslav P Melnyk Mykhaylo R Stasyshyn Ihor V Yavorskyi Nazarii B popup.nrat_date 2021-03-26 Close