Hypersonic spectroscopy for materials characterization
Snow, Paul A. Department of Physics, University of Bath, Bath, Somerset, United Kingdom.
- Experimental techniques
- Better is smaller, faster, and greener
- Tuning silicon with nanoholes
- Multilayered mirrors
- Links to Primary Literature
- Additional Readings
Hypersonic spectroscopy is the measurement of the relative interaction of different very high frequencies of sound with a solid elastic sample. The description “hypersonic” indicates that the frequencies are greater than 1 gigahertz (GHz, 109 or one thousand million oscillations per second). The elastic properties of materials, quantitatively describing the deformation of the material caused by applied forces, are measured by this technique, and the high frequencies, corresponding to a short wavelength for the sound, make the technique ideal for investigating materials with very small features of the order of micrometers (1 μm = 10−6 m, one millionth of a meter). The internal movements of the material caused by the wave can be in the direction of energy propagation of the wave (a longitudinal wave, such as sound) or perpendicular to it (a transverse wave), so that the waves, as they go through the material, are more correctly described as elastic waves rather than sound waves.
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 9000 highly qualified scientists and 43 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information