Title :
Picosecond ultrasonics
Author :
Grahn, Holger T. ; Maris, Humphrey J. ; Tauc, Jan
Author_Institution :
Max-Planck-Inst. fuer Festkorperforschung, Stuttgart, West Germany
fDate :
12/1/1989 12:00:00 AM
Abstract :
The generation and detection of ultrasonic waves with picosecond time resolution are described. With picosecond ultrasonics, the frequency range of acoustic waves is extended into the 100-GHz range. It allows the investigation of thin-film materials, microstructures, and materials with large acoustic attenuation. Velocity and attenuation measurements on a variety of thin films are reviewed. The results on complex microstructures, including multilayers, are presented
Keywords :
high-speed optical techniques; photoacoustic effect; thin films; ultrasonic absorption; ultrasonic velocity measurement; 100 GHz; acoustic wave frequency range; attenuation measurements; complex microstructures; large acoustic attenuation; microstructures; multilayers; picosecond time resolution; picosecond ultrasonics; thin films; thin-film materials; ultrasonic wave detection; ultrasonic wave generation; ultrasonic waves; velocity measurements; Acoustic measurements; Acoustic waves; Attenuation; Face detection; Optical pulse generation; Pulse amplifiers; Pulse generation; Radio frequency; Solids; Temperature;
Journal_Title :
Quantum Electronics, IEEE Journal of
