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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.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 1| January 2019| Pages 184-193
https://doi.org/10.1107/S1600577518015370
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