Wave-momentum shaping for moving objects in heterogeneous and dynamic media
Orazbayev B. Malléjac M. Bachelard N. Rotter S. Fleury R.
September 2024Nature Research
Nature Physics
2024#20Issue 91441 - 1447 pp.
Light and sound waves can move objects through the transfer of linear or angular momentum, which has led to the development of optical and acoustic tweezers, with applications ranging from biomedical engineering to quantum optics. Although impressive manipulation results have been achieved, the stringent requirement for a highly controlled, low-reverberant and static environment still hinders the applicability of these techniques in many scenarios. Here we overcome this challenge and demonstrate the manipulation of objects in disordered and dynamic media by optimally tailoring the momentum of sound waves iteratively in the far field. The method does not require information about the object’s physical properties or the spatial structure of the surrounding medium but relies only on a real-time scattering matrix measurement and a positional guide-star. Our experiment demonstrates the possibility of optimally moving and rotating objects to extend the reach of wave-based object manipulation to complex and dynamic scattering media. We envision new opportunities for biomedical applications, sensing and manufacturing.
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Physics Department, School of Sciences and Humanities, Nazarbayev University, Astana, Kazakhstan
Laboratory of Wave Engineering, School of Engineering, EPFL, Lausanne, Switzerland
Université de Bordeaux, CNRS, LOMA, UMR5798, Talence, France
Institute of Theoretical Physics, Vienna University of Technology (TU Wien), Vienna, Austria
Physics Department
Laboratory of Wave Engineering
Université de Bordeaux
Institute of Theoretical Physics
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