Abstract

A theoretical model of photoacoustic response signal formation from laser-irradiated metal membranes is proposed with allowance for the excitation of defect states. Theoretical results obtained for 197-μm-thick aluminum membranes in a frequency range from 20 Hz to 7 kHz are compared to experimental data for membranes excited by laser radiation at a 660-nm wavelength. The proposed theoretical model provides quite adequate coincidence with experiment for membrane oscillations under the assumption of a purely surface character of laser radiation absorption.

中文翻译：

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热弹性机理对铝膜激光激发的声振荡

摘要

提出了由激光辐照金属膜形成光声响应信号的理论模型，并考虑了缺陷状态的激发。将在20 Hz至7 kHz频率范围内的厚度为197μm的铝膜获得的理论结果与由660 nm波长的激光辐射激发的膜的实验数据进行比较。所提出的理论模型在纯激光辐射吸收的表面特性的假设下，与膜振动实验提供了足够的一致性。