Answers are grounded in this paper and cite their sources.
We observe experimentally the propagation of surface-guided waves in a hypersonic phononic crystal, both in the radiative and nonradiative regions of the spectrum. Combining electrical measurements in reflection and transmission as well as optical maps of the surface displacement, a band gap extending from 0.6 to 0.95 GHz is identified in a square lattice array of 1 μm radius air holes milled in lithium niobate. The optical measurements reveal the transmission of surface-guided waves above the band gap, well inside the sound cone.
No takes yet. Share an insight, caveat, or question.
Benchabane et al. (2011) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: