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Surface Phonon Focusing at Ultrasonic Frequencies

  • Al. A. Kolomenskii
  • A. A. Maznev
Chapter

Abstract

Surface phonon focusing is examined with laser excitation of pulsed surface acoustic waves (SAWs). 10–ns SAW pulses are generated by a focused beam of a Q-switched Nd:YAG laser. To visualize the SAW amplitude distribution we use a “dust patterns” arising as a result of SAW-induced dust particle removal from the surface under investigation. The SAW amplitude measurements with the probe beam deflection technique show that the above patterns reflect adequately the SAW amplitude angular dependence. Strong SAW focusing is observed on cubic crystals such as Si, Ge, GaAS. The results obtained are compare with theory.

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Copyright information

© Plenum Press, New York 1994

Authors and Affiliations

  • Al. A. Kolomenskii
    • 1
  • A. A. Maznev
    • 1
  1. 1.General Physics Institute of the Russian Academy of Sci.MoscowRussia

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