Journal ArticleDOI
Dynamics of Picosecond Laser-Generated Acoustic Waves in Solids
Yoshihiko Kanemitsu,Yoshinao Harada,Yoshinao Harada,Yuichi Tanaka,Noboru Nakano,Hiroto Kuroda,Kazushi Yamanaka +6 more
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TLDR
In this paper, the generation and propagation characteristics of laser-generated acoustic waves in solids were studied using an optical detection technique and a ZnO piezoelectric transducer.Abstract:
Generation and propagation characteristics of picosecond laser-generated acoustic waves in solids were studied using an optical detection technique and a ZnO piezoelectric transducer. The propagation of laser-generated acoustic waves was directional. At the early stage of propagation, the propagation velocity of the wavefront exceeded the sound velocity in solids. The generation and propagation behavior of acoustic waves are very sensitive to the interaction conditions between laser pulses and solid surfaces. The formation and expansion of laser-generated plasmas affect the generation dynamics of acoustic waves.read more
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Laser-generated ultrasound: its properties, mechanisms and multifarious applications
TL;DR: In this article, the authors reviewed the application of this unique ultrasonic source with particular emphasis on the application in non-destructive testing and determination of candle flame parameters, and possible future applications are also outlined.
Journal ArticleDOI
Time-of-Flight Diffraction Measurement Using Laser Ultrasound
TL;DR: In this article, a new time-of-flight diffraction (TOFD) method based on laser ultrasound was developed, which can use not only longitudinal waves but also shear waves.
Patent
Method and device for quantifying medium viscoelasticity
TL;DR: In this article, a method for quantifying the viscoelasticity of a medium is proposed, where the angle for which the signal energy is greatest in the position-time graph is determined by using an angle projection.
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