TY - GEN
T1 - Fast hypersonic velocity measurement by Brillouin scattering from induced phonons
AU - Sugimoto, Takeshi
AU - Yanagitani, Takahiko
AU - Takayanagi, Shinji
AU - Matsukawa, Mami
PY - 2012
Y1 - 2012
N2 - 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.
AB - 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.
KW - Brillouin scattering
KW - Coaxial microwave resonator
KW - Induced phonons
KW - ZnO piezoelectric thin film
UR - http://www.scopus.com/inward/record.url?scp=84882325785&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84882325785&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2012.0546
DO - 10.1109/ULTSYM.2012.0546
M3 - Conference contribution
AN - SCOPUS:84882325785
SN - 9781467345613
T3 - IEEE International Ultrasonics Symposium, IUS
BT - 2012 IEEE International Ultrasonics Symposium, IUS 2012
T2 - 2012 IEEE International Ultrasonics Symposium, IUS 2012
Y2 - 7 October 2012 through 10 October 2012
ER -