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Experimentally measured interface waves. Experimentally measured RMS displacement field of the system excited by a source (marked with black stars) at 77 kHz, documenting wave propagation (A) along a horizontal interface and (B) along a sharp-angled interface exhibiting back-scattering free propagation. Displacements are normalized by the amplitude of the input wave. For these interfaces, the location of the shunted PZT patch on either side of the green line is reversed.
