Measurement of periodic surface heating using surface acoustic waves
- 15 October 1983
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 43 (8) , 748-750
- https://doi.org/10.1063/1.94483
Abstract
A new technique is described to measure periodic heating at and near the surface of a material. The technique involves the phase perturbation of a surface acoustic wave propagating through the heated region. Temperature fluctuations can be measured at modulation frequencies of several hertz to hundreds of kilohertz with high sensitivity. A theory is given which predicts the acoustic phase perturbation as a function of thermal modulation frequency, and is shown to agree well with experiment.Keywords
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