Laser generation of ultrasound in films and coatings

T. W. Murray*, Sridhar Krishnaswamy, Jan Drewes Achenbach

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

A model for the pulsed laser generation of ultrasound in an isotropic film on a semi-infinite substrate is presented. The model gives the time domain displacement of the system as a function of the density and mechanical properties of the film and substrate and the thermal properties of the film. The model has been verified experimentally using a 1 ns Nd:YAG laser source for acoustic wave generation and a stabilized Michelson interferometer for detection. Experimental and theoretical signals agree well for both the case of a fast layer on a slow substrate (zirconium nitride/steel) and a slow layer on a fast substrate (titanium/aluminum).

Original languageEnglish (US)
Pages (from-to)3561-3563
Number of pages3
JournalApplied Physics Letters
Volume74
Issue number23
DOIs
StatePublished - Jun 7 1999

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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