Features of photothermal transformation in porous silicon based multilayered structures
Abstract
This paper is devoted to the study of photothermal transformations in multilayered structures. As a modelled sample, porous silicon with a periodic distribution of the porosity was chosen. The spatial distribution of the optical properties inside the structure was evaluated under Brugmann approximation. The heat sources arising as a result of electromagnetic radiation absorption in the structure were estimated by solving Maxwell equations. This allowed us to calculate temperature profiles inside photo-excited sample. For experimental measurements, photoacoustic set-up with a gas-microphone transduction system was chosen to investigate thermal properties of the structure. The results of the photoacoustic response simulation based on the gas-piston model demonstrated an excellent agreement with experiments. This allows a reliable evaluation of the thermal conductivity by fitting the experimental amplitude-frequency photoacoustic signal with the simulated one.
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Cite
@article{arxiv.1907.02875,
title = {Features of photothermal transformation in porous silicon based multilayered structures},
author = {K. Dubyk and L. Chepela and P. Lishchuk and A. Belarouci and D. Lacroix and M. Isaiev},
journal= {arXiv preprint arXiv:1907.02875},
year = {2019}
}