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 language | English (US) |
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Pages (from-to) | 3561-3563 |
Number of pages | 3 |
Journal | Applied Physics Letters |
Volume | 74 |
Issue number | 23 |
DOIs | |
State | Published - Jun 7 1999 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)