Advertisement

Surface Studies with Acoustic Probe Techniques

  • D. A. Rockwell
  • T. S. Colbert
  • J. H. Parks
Part of the Optical Physics and Engineering book series (OPEG)

Abstract

A new measurement technique is discussed which utilizes acoustic surface waves to detect the surface depth dependence of radiative absorption. We present a theoretical analysis of the detection process which relates these measurements to a quantitative model of surface absorption phenomena. This technique is generally applicable to study weak surface absorption at wavelengths for which a material is essentially transparent. Surface wave phase variations induced by the absorption of 10.6μm radiation have been measured on KC1 surfaces. The surface absorption o of these samples was also measured by calorimetry to be σ~2×10−4. A radiative pulse of 100 msec and 5 joules incident energy has been observed to induce an 80 mrad phase change. Shorter radiative pulses (~10 msec) are necessary to probe the temperature depth gradient arising from a depth variation of the absorption coefficient. Initial results of recent studies to measure the depth dependence of surface radiative absorption on etched alkali halide surfaces are presented.

Keywords

Surface Wave Acoustic Surface Wave Depth Dependence Interdigital Transducer Acoustic Probe 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    M. Haas, J. W. Davisson, H. B. Rosenstock, and J. Babiskin, Proc. Int. Conf. Cpt. Prop. Highly Transparent Sol., paper VI-B (Waterville, N. H. 1975 ).Google Scholar
  2. 2.
    J. H. Parks, D. A. Rockwell, T. S. Colbert, K. M. Lakin, and D. Mih, Appl. Phys. Lett. 25, 537 (1974).ADSCrossRefGoogle Scholar
  3. 3.
    D. A. Rockwell and J. H. Parks (to be published).Google Scholar
  4. 4.
    T. F. Deutsch, Appl. Phys. Lett. 25, 109 (1974).ADSCrossRefGoogle Scholar
  5. 5.
    D. A. Rockwell and J. H. Parks, (to be published).Google Scholar

Copyright information

© Plenum Press, New York 1975

Authors and Affiliations

  • D. A. Rockwell
    • 1
  • T. S. Colbert
    • 1
  • J. H. Parks
    • 1
  1. 1.Departments of Physics and Electrical EngineeringUniversity of Southern CaliforniaLos AngelesUSA

Personalised recommendations