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Spectral analysis of amplitude and phase echoes in picosecond ultrasonics for strain pulse shape determination. | LitMetric
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Spectral analysis of amplitude and phase echoes in picosecond ultrasonics for strain pulse shape determination.

Takehiro Tachizaki Jeremy J Baumberg Osamu Matsuda Motonobu Tomoda Hirotsugu Ogi Oliver B Wright

Photoacoustics

Graduate School of Engineering, Osaka University, Yamadaoka 2-1, Suita, Osaka, 565-0871, Japan.

Published: December 2023

We introduce a spectral analysis method in picosecond ultrasonics to derive strain pulse shapes in a opaque sample with known optical properties. The method makes use of both the amplitude and phase of optical transient relative reflectance changes obtained, for example, by interferometry. We demonstrate this method through numerical simulation and by analysis of experimental results for a chromium film.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10651667PMC
http://dx.doi.org/10.1016/j.pacs.2023.100566DOI Listing

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