Ultrasound tunneling through 3D phononic crystals.
We report the study of ultrasound tunneling in 3D phononic crystals, consisting of fcc arrays of close-packed tungsten carbide beads in water. The transmission coefficient, phase velocity, and group velocity were measured along the [111] direction, allowing us to systematically investigate the tunneling of ultrasound at frequencies in the lowest band gap. Our experimental data are interpreted using multiple scattering theory, which provides a good explanation of our results. The effect of absorption and the difference between the tunneling of classical waves and quantum waves are discussed.
Yang
Suxia
S
Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada.
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J H
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Liu
Zhengyou
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Cowan
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Chan
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Sheng
Ping
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