摘要 :
Three-dimensional (3D) phononic crystals give rise to the so-called 3D phononic bandgaps, which are frequency ranges where the propagation of elastic or acoustic waves is prohibited along all spatial directions. Phononic crystals ...
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Three-dimensional (3D) phononic crystals give rise to the so-called 3D phononic bandgaps, which are frequency ranges where the propagation of elastic or acoustic waves is prohibited along all spatial directions. Phononic crystals show various potential applications, such as vibration suppression, noise isolation, waveguiding and filtering, etc. By appropriately terminating the 3D phononic crystals, the elastic waves can be guided at the surface and/or the edge of the finite-size crystals. The 3D-printed phononic crystal samples are experimentally tested to assess the transmission spectra of surface and edge modes in the finite-size structures. And the experimental results show good agreement with the theoretical predictions. The surface and edge modes would open up avenues for the manipulation of elastic waves in periodic structures, and show great potential for designing complex and compact phononic circuits.
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