Acoustic fields of bulk acoustic waves excited by phase velocity scanning of laser interference fringes

Hideo Nishino, Yusuke Tsukahara, Mikio Takemoto, Kazushi Yamanaka

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Directivity and generation efficiency of transverse and longitudinal bulk acoustic waves (BAWs) excited by phase velocity scanning (PVS) of laser interference fringes were theoretically investigated. Formulas were derived for the BAW generation based on scanning interference fringes (SIF) which were produced by intersecting two coherent laser beams with different frequencies on an opaque specimen. It was deduced that the amplitude of the BAW was proportional to the product of the scanning length of the SIF and the directivity pattern due to the thermoelastic line source. Unidirectionality of the BAW generated by the SIF was theoretically verified in an ideal state.

Original languageEnglish
Pages (from-to)2256-2261
Number of pages6
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number4
DOIs
Publication statusPublished - 2002 Apr

Keywords

  • Bulk acoustic waves
  • Laser ultrasound
  • Phase velocity scanning
  • Scanning interference fringes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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