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Information × Registration Number 0222U001807, 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 03-02-2022 Organization Lviv Polytechnic National University popup.description2 As a result of the 3rd stage of scientific work, samples with the dimensions 25×25 mm and 2 mm thick were made. Experimental studies of transmittance and refractive index of the studied semiconductor crystalline materials Ge, Bi12GeO20, CaWO4, CaMoO4, and samples of crystalline and fused quartz in a wide range (0.1-1.5 THz) were performed. Our previous estimate of the diffraction efficiency of acousto-optical devices at the subTHz range showed low values (~0.03%). Analyzing the obtained data and data from the literature, the development of devices that will work in this frequency range with an efficiency of > 0.03% is impossible. As a result, our attention was focused on developing other control devices for subTHz radiation, namely polarizers and filters. Consequently, a method for calculating a polarizer and a dichroic filter for the subTHz range using the finite element method is proposed. The obtained simulation results show good agreement with the known experimental and simulation data within 3-9% of the error. Based on the calculations, quartz-lined filters were made using thin-film technology and photolithography, as well as the method of thick-film technology. It is shown that those made by the method of thick-film technology are not inferior to thin-film ones in their efficiency, and the cost of their production is many times lower. The efficiency of the manufactured filters was 40% for a frequency of 300 GHz.  Product Description popup.authors Bak Roman I Bendak Andrii V Kushnir Dmytro O Stasyshyn Ihor V Yavorskyi Nazarii B popup.nrat_date 2022-03-09 Close