Fast hypersonic velocity measurement by Brillouin scattering from induced phonons

Takeshi Sugimoto, Takahiko Yanagitani, Shinji Takayanagi, Mami Matsukawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Brillouin scattering method is a nondestructive and noncontact technique to measure local longitudinal and shear acoustic velocities in the GHz range. However, the measurements of weak scattering from thermal phonons result in the lower measurement accuracy and longer measurement time. To overcome this problem, a technique with artificially induced acoustic phonons was developed using a polycrystalline ZnO film, with a coaxial resonator to apply electric field. In this study, we observed Brillouin scattering by induced longitudinal phonons from ZnO film deposited on the rear surface of a plate sample. We investigated the relationship between the intensity of induced acoustic phonons and the input microwave power of a coaxial resonator. The effect of incident angle of light was also investigated.

Original languageEnglish
Title of host publication2012 IEEE International Ultrasonics Symposium, IUS 2012
DOIs
Publication statusPublished - 2012 Dec 1
Externally publishedYes
Event2012 IEEE International Ultrasonics Symposium, IUS 2012 - Dresden, Germany
Duration: 2012 Oct 72012 Oct 10

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2012 IEEE International Ultrasonics Symposium, IUS 2012
CountryGermany
CityDresden
Period12/10/712/10/10

Keywords

  • Brillouin scattering
  • Coaxial microwave resonator
  • Induced phonons
  • ZnO piezoelectric thin film

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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