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Figure 4
Results of the fast Fourier transform (FFT) analysis of the SAWs from videos shown in the supporting information. (a) FFT amplitude maps for excitation of one (left-hand side) or two IDTs (right-hand side). The profiles below the maps were extracted from the highlighted box. (b) Corresponding maps (in periodic colour scale) and profiles of the FFT phase parameter.

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ISSN: 1600-5775
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