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Information × Registration Number 0220U104316, 0118U000242 , R & D reports Title Features of photothermal and photoacoustic processes in low-dimensional semiconductor silicon-based systems popup.stage_title Head Dubyk Kateryna V., Кандидат фізико-математичних наук Registration Date 16-12-2020 Organization Taras Shevchenko National University of Kyiv popup.description2  Object of research: photothermal and photoacoustic phenomena in silicon-based semiconductor systems, in particular in multilayer structures based on porous silicon, when irradiated with harmonically modulated electromagnetic radiation in the visible range. Subject of research: processes that take place in photothermal and photoacoustic phenomena in these nanostructured silicon-based semiconductor systems when irradiated with harmonically modulated electromagnetic radiation. Purpose: to obtain physical laws of photothermal transformation and formation of photoacoustic response in inhomogeneous semiconductor systems with reduced dimension. Research methods: photoacoustic methods with gas microphone and piezoelectric registration of informative response when irradiating samples with harmonically modulated or pulsed electromagnetic radiation in the visible range, methods of Raman scattering. The amplitude-frequency and phase-frequency characteristics of the photoacoustic response from multilayer structures based on porous silicon, layers of silicon nanowires and composite systems based on them were experimentally obtained. The influence of the morphology of silicon nanowires on their thermophysical and optical properties was investigated by model calculations using the analysis of experimental results. The value of thermal resistance between porous layers of different porosity in a multilayer system based on porous silicon was calculated experimentally and its influence on the value of effective thermal conductivity of the whole multilayer system was analyzed. Mathematical models describing the features of photothermal transformation in low-dimensional semiconductor systems based on silicon are presented, a software solution for modeling photothermal transformation in multilayer structures based on silicon is developed Product Description popup.authors Bur'yan Sergiy A. Grebnev Oleg A. Klimchuk Taras V. Lishchuk Pavlo O. Manʹkovsʹka Yuliya O. popup.nrat_date 2020-12-16 Close