Real-time optical characterization of surface acoustic modes of polyimide thin-film coatings
- 1 October 1992
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 72 (7), 2823-2839
- https://doi.org/10.1063/1.351535
Abstract
A modification of the optical technique of impulsive stimulated thermal scattering that allows real‐time data acquisition is introduced. The method is used to characterize the pseudo‐Rayleigh acoustic modes of thin (∼1 μm) polyimide films attached to silicon substrates and its potential use as a means for extracting the elastic constants of thin‐film coatings is demonstrated.Keywords
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