Nonleaky surface acoustic waves on a textured rigid surface

Through a systematic theoretical analysis, we find that coarse corrugations textured on rigid surfaces are preferred to realize highly confined surface acoustic waves over a broad frequency range. To give a direct validation for the existence of the nonleaky surface waves, we have experimentally measured the dispersion relation. The experimental result agrees excellently with the theoretical one. Extensive applications of such artificial surface waves can be predicted because of the flexibility in design.