Noncontact determination of transverse isotropic elastic moduli in polyimide thin films using a laser based ultrasonic method

John A. Rogers*, Lisa Dhar, Keith A. Nelson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

A transient grating laser ultrasonic method known as real-time impulsive stimulated thermal scattering is used to excite and monitor Lamb acoustic waveguide modes in free-standing thin polyimide films which are known to have transverse isotropic symmetry. The dispersion of these Lamb modes is used to accurately evaluate both the in and out-of-plane elastic moduli.

Original languageEnglish (US)
Pages (from-to)312-314
Number of pages3
JournalApplied Physics Letters
Volume65
Issue number3
DOIs
StatePublished - Dec 1 1994

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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