title: Ultrasound tunneling through 3D phononic crystals.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba, Canada.
authors.forename: Suxia
authors.initials: S
authors.lastname: Yang
authors.forename: J H
authors.initials: JH
authors.lastname: Page
authors.forename: Zhengyou
authors.initials: Z
authors.lastname: Liu
authors.forename: M L
authors.initials: ML
authors.lastname: Cowan
authors.forename: C T
authors.initials: CT
authors.lastname: Chan
authors.forename: Ping
authors.initials: P
authors.lastname: Sheng