Guided elastic waves along a rod defect of a two-dimensional phononic crystal.
It was shown that elastic waves propagating out-of-plane in a two-dimensional phononic crystal can experience full-band-gaps for nonzero values of the wave-vector component parallel to the rods. By further inserting a rod defect, it is demonstrated that modes propagating along the rod defect can be localized within the band-gaps of the phononic crystal. Such waveguide modes are exhibited for a tungsten/epoxy composite containing an aluminum nitride rod as the rod defect. It is expected that guided modes of such a structure can be excited and detected electrically owing to the piezoelectric effect.
Khelif
A
A
Institut FEMTO-ST, Département LPMO, CNRS UMR 6174, 32 avenue de I'Observatoire, 25044 Besançon cedex, France.
Wilm
M
M
Laude
V
V
Ballandras
S
S
Djafari-Rouhani
B
B