近日，瑞士洛桑联邦理工学院的Romain Fleury及其研究团队取得一项新进展。经过不懈努力，他们实现非均匀和动态介质中运动物体的波动量整形。相关研究成果已于2024年6月21日在国际知名学术期刊《自然—物理学》上发表。

据悉，光波和声波可以通过线动量或角动量的转移来移动物体，这导致了光学和声学镊子的发展，其应用范围从生物医学工程到量子光学。尽管这些技术已展现出令人瞩目的操控效果，但它们对高度控制、低混响和静态环境的严格要求，仍在一定程度上限制了这些技术在各种场景下的广泛应用。

该研究团队克服了这一挑战，并展示了在无序和动态介质中通过在远场中迭代地优化调整声波的动量来操纵物体。该方法不需要物体的物理特性或周围介质的空间结构信息，而只依赖于实时散射矩阵测量和位置导星。这一实验证明了物体最佳移动和旋转的可能性，从而将基于波的物体操纵技术扩展至复杂和动态散射介质的范围。这一技术将为生物医学应用、传感和制造业等领域带来全新的机遇。

附：英文原文

Title: Wave-momentum shaping for moving objects in heterogeneous and dynamic media

Author: Orazbayev, Bakhtiyar, Malljac, Matthieu, Bachelard, Nicolas, Rotter, Stefan, Fleury, Romain

Issue&Volume: 2024-06-21

Abstract: 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.

DOI: 10.1038/s41567-024-02538-5

Source: https://www.nature.com/articles/s41567-024-02538-5