High-order modes of spoof surface acoustic waves

Spoof surface acoustic waves (SSAWs), achieved by the perfect rigid body (PRB) textured with subwavelength structures, can support strongly localized surface waves. Here, we explore the high-order modes of SSAWs in the corrugated structures with large height, whose impact on the dispersion relations are intensively discussed. The high-order modal fields are analyzed for better understanding of the underlying physics in SSAW generation.