Theoretical Calculation of Laser Driving 3-D Microrotors

摘要

In this paper, we propose the new theoretical investigation on the optical forces and torques on complex microrotors. Based on R. C. Gauthier's modified ray model, the optical forces and toques on a complex micro-object, the conical microrotor, are analyzed. The viscous drag torque is esti- mated by Stokes flow to obtain the rotational speed. The results of our computation agree well with the previously published experimental results, which indicates that our approach of the optical torque calculation is suitable for complex microrotors and that the theoretical calculation is very helpful to optimu m design of light-driven microrotors. The primary experimental results of one kind of microrotors driven are also presented.