Optical Manipulation with Planar Silicon Microring Resonators

We demonstrate optically trapping of microparticles on silicon microring resonators Once trapped on a microring, a particle can be confined in an optical potential with a depth of 25 k(B)T over the entire microring's circumference The particles are propelled around the microring at hundreds of micrometers per second, producing periodic revolutions at a few hertz We anticipate that the increased force and highly accurate positioning obtainable with this system will lead to various nanomanipulation applications