Light Drives Micrometer-Sized Motor and Gear Train

Researchers at the University of Gothenburg have developed micrometer-sized motors and gear trains powered by light using semiconductor lithography. These devices are significantly smaller than existing designs, enabling precise control and movement of geared functional devices. By leveraging optical metasurfaces and lasers, the team created a metarotor structure that can spin gear wheels and drive gear trains. The durability of the motor under continuous illumination was investigated, showing operational stability for up to 11 hours. The research, detailed in a Nature Communications paper, explores the potential of light-driven micromachines in various applications.