Further evidence for two-component surface acoustic wave reflections from surface breaking slots

Dewhurst, R. J.; McKie, A. D. W.; Palmer, S. B.
December 1986
Applied Physics Letters;12/22/1986, Vol. 49 Issue 25, p1694
Academic Journal
When laser-generated Rayleigh pulses interact with surface breaking slots in metals, two distinct reflections are present in the captured waveform. While the first component is accepted as arising from the direct reflection of a Rayleigh pulse from the top of the defect, the origin and features of the second component have been the subject of some discussion. This letter presents evidence to show that the second component also propagates at the Rayleigh velocity, lending support to the suggestion that it originates at the base of the slot and can be used to measure the slot depth.


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