Researchers from the Chinese Academy of Sciences and Hefei University of Technology have developed a new method for precise object manipulation without electronic control. The study, published in the journal Advanced Science, demonstrates how a specially designed thin plate can rotate, guide, and position objects of various sizes.
Traditional vortex wave manipulation typically requires complex electronic systems and multi-channel equipment. The new passive sub-wavelength structure approach replaces these systems with a pre-programmed thin plate. By etching maze-like micro-structures into the plate, the team generates a controllable vortex wave field using only single-channel excitation.
The technology utilizes a dual-action mechanism where non-uniform wave fields constrain object positions while vortex dynamics drive their movement. Experiments confirmed the system handles objects ranging from sub-millimeter particles to centimeter-scale lightweight components. The movement direction can be adjusted by modifying the plate design.
This passive control model eliminates the need for complex electronic phase regulation, potentially reducing costs and equipment requirements. The research offers new possibilities for micro-particle transport, precision mechanical driving, and the development of lightweight, simplified micro-robotics and intelligent manufacturing systems.
