THEORETICAL DEMONSTRATION OF A NEWLY DESIGNED MICRO-ROTATOR DRIVEN BYOPTICAL PRESSURE ON A LIGHT INCIDENT SURFACE

A newly designed cylindrical optical micro-rotator which has slopes fo r trapping and rotation on its upper surface is proposed. The cylindri cal shape is effective in decreasing viscous drag force (damping facto r) in the medium. A ray-tracing method considering the beam waist is e mployed to analyze the radiation pressure exerted on the upper surface of the rotator. We have demonstrated optical trapping and high speed rotation for various optical beam parameters such as the lens numerica l aperture and the Gaussian mode profile as well as rotator shape para meters including oblique angle, height and diameter.