Evidence of slow acoustic surface waves on a 1D phononic surface by a pulsed laser spectroscopic technique resolved in time and space
Authors: Malfanti I., Taschin A., Bartolini P., Torre R.
Autors Affiliation: European Laboratory for Non-Linear Spectroscopy (LENS), Università a di Firenze – Via N. Carrara 1, I-50019 Sesto Fiorentino, Firenze, Italy EU;
Dipartimento di Fisica ed Astronomia, Università di Firenze – Via Sansone 1, I-50019 Sesto Fiorentino, Firenze, Italy, EU;
Istituto Nazionale di Ottica (INO)-CNR – Largo E. Fermi 6, I-50125, Firenze, Italy, EU
Abstract: We report the investigation of surface acoustic waves (SAWs) propagating on a 1D phononic surface (PS) by the heterodyne-detected transient reflecting grating technique. A suitable experimental configuration enables the excitation of traveling SAWs with variable wave numbers and the measurement of their propagation with temporal and spatial resolution. Using the full characterization of the band diagram of this PS, as reported previously (MALFANTI I., TASCHIN A., BARTOLINI P., BONELLO B. and Torre R., J. Mech. Phys. Solids, 59 (2011) 2370), we studied the dispersion properties of the SAWs as the wave number approaches the Brillouin zone edge. SAW-packet group velocities show a clear slowing-down process approaching the BZ edge, with a measurable minimum velocity of about 140 m/s Copyright (C) EPLA, 2012
Volume: 97 (4) Pages from: 44010 to: 44010
More Information: This research has been performed at LENS and supported with EC grant No. RII3-CT-2003-506350. We would like to thank M. MANNINI and researchers from CE.M.E.-CNR for sample preparation and characterization. A special thanks to M. De Regis for valuable support in experimental data collection and analysis.DOI: 10.1209/0295-5075/97/44010Citations: 6data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2020-02-23References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here