Phys. Rev. Lett. 88, 104301 (2002) [4 pages]Ultrasound Tunneling through 3D Phononic CrystalsReceived 22 August 2001; published 26 February 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.104301
DOI:
10.1103/PhysRevLett.88.104301
PACS:
43.35.+d, 63.20.Dj
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