Publication
Applied Physics Letters
Paper

Photoacoustic generation and detection of 10-ns acoustic pulses in solids

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Abstract

We describe the generation and detection of short acoustic pulses (∼10-ns widths) in opaque plates, using weak laser pulses (less than 1-mJ energy) for excitation. The longitudinal, shear, and surface acoustic waves generated by a single laser pulse can be time resolved by using a thin-film piezoelectric transducer, and acoustic mode conversions at surfaces are clearly observable. This new photoacoustic material testing technique is useful for fast ultrasonic measurements or for detecting deep subsurface flaws.

Date

01 Dec 1983

Publication

Applied Physics Letters

Authors

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