Extended Data Fig. 4: Acoustic spectra and dispersion relations of tetrakaidecahedron samples.
From: Dynamic diagnosis of metamaterials through laser-induced vibrational signatures
a, SEM images of selected [100] samples for illustration. Scale bar, 50 μm. b, Acoustic spectra experimentally determined using the centre-pump scheme of LIRAS. c, Transverse-pump scheme representative data. d, Dispersion relations extracted from the spectra.
