2015/05/31 by Paolo Celli, Stefano Gonella · 1 voice · 1 citation
Engineering · Materials Science · #Acoustic Wave Phenomena Research #Metamaterials and Metasurfaces Applications #Ultrasonics and Acoustic Wave Propagation
paper · doi:10.1063/1.4929566
openalex publication_date 2015/08/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/29
In this letter, we discuss a versatile, fully reconfigurable experimental platform for the investigation of phononic phenomena in metamaterial architectures. The approach revolves around the use of 3D laser vibrometry to reconstruct global and local wavefield features in specimens obtained through simple arrangements of LEGO® bricks on a thin baseplate. The agility by which it is possible to reconfigure the brick patterns into a nearly endless spectrum of topologies makes this an effective approach for rapid experimental proof of concept, as well as a powerful didactic tool, in the arena of phononic crystals and metamaterials engineering. We use our platform to provide a compelling visual illustration of important spatial wave manipulation effects (waveguiding and seismic isolation), and to elucidate fundamental dichotomies between Bragg-based and locally resonant bandgap mechanisms.