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Picosecond ultrasonics

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3 Author(s)
H. T. Grahn ; Max-Planck-Inst. fuer Festkorperforschung, Stuttgart, West Germany ; H. J. Maris ; J. Tauc

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

Published in:

IEEE Journal of Quantum Electronics  (Volume:25 ,  Issue: 12 )