Loading...
research article
Anisotropic propagation and confinement of high frequency phonons in nanocomposites
We show that self-ordered anodic aluminum oxide containing hexagonal arrays of cylindrical nanopores with submicron periodicity is a versatile model system for the exploration of rich phononic phenomena at gigahertz frequencies, which are intimately linked to fluids located in the nanopores and their interactions with the pore walls. Using high-resolution Brillouin spectroscopy we report the first realization of directional flow of elastic energy parallel and perpendicular to the pore axes, phonon localization, and tunability of the phononic band structure.
Type
research article
Authors
Publication date
2009
Published in
Volume
130
Issue
11
Article Number
111102
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
February 17, 2010
Use this identifier to reference this record