Open AccessАкустические колебания алюминиевых мембран при лазерном возбуждении по термоупругому механизму
Author(s) -
А.Л. Глазов,
К.Л. Муратиков
Publication year - 2020
Publication title -
pisʹma v žurnal tehničeskoj fiziki
Language(s) - English
Resource type - Journals
eISSN - 1726-7471
pISSN - 0320-0116
DOI - 10.21883/pjtf.2020.10.49425.18247
Subject(s) - laser , radiation , excited state , materials science , wavelength , excitation , absorption (acoustics) , membrane , optics , atomic physics , optoelectronics , physics , chemistry , biochemistry , quantum mechanics
A theoretical model of the formation of a photoacoustic signal from metal membranes by laser radiation is proposed taking into account the excitation of defective states in them. The theoretical results obtained are compared for aluminum membranes with a thickness of 197 μm in the frequency range from 20 Hz to 7 kHz when they are excited by laser radiation with a wavelength of 660 nm. It is shown that the proposed theoretical model ensures good agreement between the experimental and theoretical results for membrane vibrations with a purely surface absorption of laser radiation.