title: Microscale multiple scattering of coherent surface acoustic wave packets probed with gigahertz time-reversal acoustics.
abstract: The multiple scattering of coherent surface acoustic wave packets in a microstructure is studied using an ultrafast optical technique. By recording a set of acoustic transfer functions, we show that it is possible to implement time-reversal acoustics and refocus the wave packets up to the GHz range, two orders of magnitude higher than usual. Many applications in time-reversal acoustics are thus transposable to correspondingly smaller structures, opening the way to efficient nondestructive characterization and manipulation of multiple scattering on the microscale.
authors.affiliation: Department of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
authors.forename: V
authors.initials: V
authors.lastname: Tournat
authors.forename: D M
authors.initials: DM
authors.lastname: Profunser
authors.forename: E
authors.initials: E
authors.lastname: Muramoto
authors.forename: O
authors.initials: O
authors.lastname: Matsuda
authors.forename: T
authors.initials: T
authors.lastname: Takezaki
authors.forename: S
authors.initials: S
authors.lastname: Sueoka
authors.forename: O B
authors.initials: OB
authors.lastname: Wright