- Category: Science & Technology
Sound can now be structured in three dimensions. Researchers from the Max Planck Institute for Intelligent Systems and the University of Stuttgart have found a way of generating acoustic holograms, which could improve ultrasound diagnostics and material testing. The holograms can also be used to move and manipulate particles.
Peer Fischer, a Research Group Leader at the Max Planck Institute for Intelligent Systems and Professor at the University of Stuttgart, normally works on micro- and nanorobots. His lab also develops the nanofabrication methods that are needed to develop such tiny swimmers. Holography was not one of his core interests. "However, we were looking for a way to move large numbers of microparticles simultaneously so that we could assemble them into larger more complex structures," explains Fischer. His research team has now found such a method with acoustic holography, and it reports the first acoustic hologram in this week's issue of Nature. The method promises a number of applications in addition to particle manipulation.