Fig. 6: Experimental demonstrations.
From: Elastic bound states in the continuum with multi-polarization hybridization
a Experimental setup. The two test specimens with the end featuring detuned bilateral pillars (specimen one) and detuned bilateral pillars connected to a waveguide (specimen two) are presented. Specimen one contains unit cells in both ends to intuitively observe mode conversion phenomenon. b and c Tested capture coefficient \(\varsigma\) of flexural waves for the two test specimens. Analytical and simulated results are also displayed for comparison. d Snapshots of Supplementary Movie 1 and 2 for specimen one at frequencies of 1.23 kHz and 1.6 kHz, corresponding to traveling and standing waves, respectively. e Normalized measured velocity response versus time for specimen one subjected to a 5-peak tone-burst excitation. f Transient full wavefields at 14.6 ms and 16. 8 ms corresponding to times in e. g Normalized power spectra for incident and reflected responses marked in e.
