Phys.org July 25, 2024
Light and sound waves can move objects through the transfer of linear or angular momentum. However, the stringent requirement for a highly controlled, low-reverberant and static environment still hinders the applicability of these techniques in many scenarios. An international team of researchers (Kazakhstan, Switzerland, France, Austria) overcame this challenge and demonstrated the manipulation of objects in disordered and dynamic media by optimally tailoring the momentum of sound waves iteratively in the far field. The method did not require information about the object’s physical properties or the spatial structure of the surrounding medium but relied only on a real-time scattering matrix measurement and a positional guide-star. According to the researchers their experiment demonstrated the possibility of optimally moving and rotating objects to extend the reach of wave-based object manipulation to complex and dynamic scattering media, and this could have new opportunities for biomedical applications, sensing and manufacturing… read more. Open Access TECHNICAL ARTICLEÂ
Moving an object in a complex scattering medium by acoustic-wave-momentum shaping. Credit: Nature Physics, 21 June 2024