Direct experimental investigations of acoustic modes guided by a solid{endash}solid interface using optical interferometry

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Journal of the Acoustical Society of America

DOI:https://doi.org/10.1121/1.420066· OSTI ID:560680

Matteie, C; Jia, X; Quentin, G ^[1]

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1. Groupe de Physique des Solides, Universite Paris 7, Unite associee au CNRS No. 17, tour 23, 2 place Jussieu, 75251 Paris Cedex 05 (France)

This paper presents direct field measurements of acoustic modes guided by the interface between two transparent solids. The measurement technique is based on the acousto-optical interaction inside the solid between the acoustic field and the probe laser beam of an interferometer. The main advantage of the method is its ability to measure acoustic strain fields in areas of difficult access with the classic detection methods. Moreover, it gives complete information about the dilatation strain field inside the solid, e.g., amplitude and phase. The propagation of a real velocity mode (Stoneley wave) is first illustrated. Then the situation of complex velocity modes is investigated for a Plexiglas{endash}fused quartz slip interface. This material combination supports two possible interface modes theoretically. These modes are simultaneously observed and the differences between their behavior are measured. {copyright} {ital 1997 Acoustical Society of America.}

• OSTI ID: 560680
• Journal Information: Journal of the Acoustical Society of America, Journal Name: Journal of the Acoustical Society of America Journal Issue: 3 Vol. 102; ISSN 0001-4966; ISSN JASMAN
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ACOUSTIC MEASUREMENTS
INTERFACES
INTERFEROMETRY
MATERIALS TESTING
NONDESTRUCTIVE TESTING
SOLIDS
SOUND WAVES
STRAINS