A new metasurface model shows potential to control acoustic wave reflection

An international team of researchers showed how a nonlinear elastic metasurface could convert a wave's fundamental frequency to its second harmonic. Structural factors in metasurfaces, like the spatial arrangement of its molecules and its composition, underpin its optical, elastic and acoustic properties. Developing this metasurface could help architects reduce noise from performance halls to cityscapes. These findings could also enhance cloaking technology for submarines to evade sonar detectio...