Research On The Optical Driving Controlling The Multi-objects And Micro-devices

The techniques of optical trapping and manipulation have been widely utilized in various scientific and engineering fields such as biology,microchemistry and micromechanics because of its merits of no mechanical contact,no wire needed and small friction.This project is supported by NSFC projects(Grant No.50335050) and 863 projects(No.2006AA04Z311).Optical trapping multi-microspheres and optical driving complex microrotors are investigated both theoretically and experimentally. The main research results are list below:1.The moment model and the finite-difference time domain model for optical driving micro-device analysis are presented based on the optical electromagnetic theory.Also a whole approach is summarized for analyzing and calculating the optical forces and torques.2.The optical forces and torques on the complex asymmetric microrotors,in the laser tweezers are modeled using the moment model and the finite-difference time domain model.The simulation using Matlab are presented.The calculation results are consistent with experimental data and supply the theoretical basis to optimum the driving efficiency of the microrotors.3.A fiber optical tweezers system is built.The polystyrene microsphere is trapped by the built optical tweezers system successfully.In conclusion,the optical trapping of multi-objects is an important part for the auto optical tweezers system design and the optical driving of microrotors facilitates the non-damage micro-driving in MEMS field.The research results that this paper presents on will be helpful to our objects and the improvement in this research area.