Phys.org   September 7, 2022 Airy beams are a class of acoustic waves that move on a curved, arch-like trajectory and can auto-focus around obstacles that are directly in the beam’s path, which makes them well suited for ultrasound applications in biomedical imaging, therapy, non-destructive testing, and particle manipulation. A team of researchers in the US (Washington State University, Pennsylvania State University) has designed and fabricated a family of Airy-beam-enabled binary acoustic metasurfaces (AB BAMs) to generate Airy beams for underwater ultrasound-beam manipulation. They used 3D printing with two coding bits: a polylactic acid unit acting as a bit “1” and […]