To address these issues, various optical tweezer techniques have been developed, but they often don't fully satisfy the critical demands. (a) Schematic diagram of graphene based opto-thermoelectric ...

Schematic of optically levitating a nanoparticle with a metalens in a vacuum. The metalens focuses a laser beam to create chip-based optical tweezers. Disclaimer: AAAS and EurekAlert! are not ...