Unidirectional bulk acoustic wave excitation by scanning interference fringes and its application to acoustical imagings

Hideo Nishino, Yusuke Tsukahara, Hideo Cho, Harumichi Sato, Kazushi Yamanaka

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

Excitation of high-frequency bulk acoustic waves (BAW) using scanning interference fringes (SIF) is presented. The SIF are produced by intersecting two coherent laser beams with different frequencies on an opaque specimen. It is possible to generate unidirectional BAW which propagate into the specimen by this method. Propagation direction of the BAW is determined by the phase-matching condition between the SIF and the wave front of the BAW at the surface, which could be controlled by incident angles of laser beams. The principle and verification of this method are briefly described in the first part. Application to the BAW velocity measurement was introduced and was experimentally verified using Si3N4 specimen. Acoustical imagings taken by the BAW generation method were also shown in the last part.

Original languageEnglish
Pages (from-to)673-678
Number of pages6
JournalProceedings of the IEEE Ultrasonics Symposium
Volume1
Publication statusPublished - 1995 Dec 1
EventProceedings of the 1995 IEEE Ultrasonics Symposium. Part 1 (of 2) - Seattle, WA, USA
Duration: 1995 Nov 71995 Nov 10

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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