动态水波镊子
Dynamic Water-Wave Tweezers
AI总结：
动态水波镊子通过可控的水波干涉实现对漂浮物体的非接触操控，适用于多种尺寸和频率的粒子。
摘要：
在最近一项展示稳定捕获漂浮粒子的静止（单频）结构水波[Nature 638, 394 (2025)]之后，我们报告了一种动态水波镊子，能够使被捕获的粒子沿任意轨迹在水面上可控运输。我们采用由三个平面波干涉形成的三角形晶格，根据参数，可以将粒子捕获在强度最大值或强度零点（涡旋）处。通过在干涉波之间引入微小频率调制，我们控制晶格和被捕获粒子的二维运动。这种方法在相对较宽的粒子尺寸和波频范围内都表现出鲁棒性和有效性，为非接触操控流体环境中漂浮（例如生物和软物质）物体提供了显著的新可能性。
英文摘要：
Following a recent demonstration of stable trapping of floating particles by stationary (monochromatic) structured water waves [Nature 638, 394 (2025)], we report dynamic water-wave tweezers that enable controllable transport of the trapped particle along an arbitrary trajectory on the water surface. Furthermore, we demonstrate simultaneous transport of two trapped particles along different trajectories. We employ a triangular lattice formed by the interference of three plane waves, which can trap particles, depending on the wave frequency and particle parameters, either at intensity maxima or at intensity zeros (vortices). By introducing small frequency detunings of the interfering waves, we control 2D motion of the lattice and trapped particles. This approach is robust and effective over a relatively broad range of particle sizes and wave frequencies, offering remarkable new possibilities for noncontact manipulation of floating (e.g., biological and soft-matter) objects in fluidic environments.
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