Search academic texts

Information × Registration Number 0224U032718, (0123U102709) , R & D reports Title Optically and acoustically controlled devices based on crystalline and nanocomposite materials for modulation of terahertz radiation popup.stage_title Напилення та дослідження спектрів пропускання ІТО та вибраних матеріалів в ТГц області спектру. Дослідження впливу світлового випромінювання на спектри пропус-кання вибраних матеріалів в ТГц області спектру. Отримання нанокомпозитів з нанокристалітами Bi12GeO20 та Bi12SiO20. Head Andrushchak Anatolii S., Доктор технічних наук Registration Date 02-12-2024 Organization Lviv Polytechnic National University popup.description1 The aim of the project is to study the effect of optically designed diffraction gratings and electrophysical parameters of semiconductor substrates on the parameters of optically controlled terahertz modulator, as well as the effect on modulation of this radiation when controlling electron density waves due to surface acoustic waves. popup.description2  The main tasks of this stage of the work are to obtain ITO thin films and study their properties in the optical and terahertz ranges of the electromagnetic spectrum, to measure S-parameters of crystalline materials Si, Ge, Bi12GeO20 (BGO), Bi12SiO20 (BSO) and thin films of selenium doped with Te and Sb under the influence of illumination, and also to embed Bi12GeO20 and Bi12SiO20 crystallites into the pores of Si, SiO2 and Al2O3 nanomatrices. ITO thin films were deposited and their properties in the optical region and frequency range 85-146 GHz of the electromagnetic spectrum were investigated. The S-parameters of crystalline materials Si, Ge, BGO, BSO and selenium thin films doped with Te and Sb at frequencies of 85-146 GHz were measured and the effect of illumination on their transmission and reflection properties was studied. The refractive indices and absorption coefficients of Si, Ge, BSO and BGO materials in the studied high frequency range were calculated. The technology for the manufacture of Si nanocomposites: Si:BSO and Si: BGO nanocomposites was developed. Raman studies and theoretical calculations of the phonon spectrum for the BGO crystal were carried out. The effect of surface modification of silicon and germanium crystals by chemical etching on their transmission and reflection properties under controlled illumination using a 130 GHz measurement complex was evaluated. Product Description popup.authors Andrushchak Nazarii A. Balaban Oksana V. Bendak Andrii V. Venhryn Bohdan Ya. Danylov Andrii B. Shchur Yaroslav Yo. popup.nrat_date 2024-12-02 Close