Dissertation > Mathematical sciences and chemical > Physics > Optics > Applied Optics

Multi-body systems and complex microdevices light-driven research

Author DiXiaoMin
Tutor HuangWenHao
School University of Science and Technology of China
Course Precision instruments and machinery
Keywords Optical tweezers Light moment Method of Moments FDTD method Complex Rotor
CLC O439
Type PhD thesis
Year 2009
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Optical tweezers as a new means of micro-operations have been due to its non- contact, no friction and no wires , etc., are widely used in biology, chemistry and micro- micro-electromechanical systems, and other fields of study. In this thesis, the National Natural Foundation of China (No.50335050) and 863 (No.2006AA042311) The main research content, a single beam optical tweezers for manipulating complex morphology of multi-objective and light-driven micro- rotor carried out theoretical and experimental studies , It also carried out a new type of fiber optical tweezers pilot study on the operating system . The main results of this paper are as follows : 1. System for multiple objects and the complexity of the micro- rotor , based on the electromagnetic theory of light given moment model and the finite difference time domain model and summarize a set of analysis and calculation steps. (2) the use of moment model and finite-difference time-domain model combined with the Gaussian laser beam transmission characteristics of the Wan -shaped micro rotor suffered optical force optical trap and optical torques theoretical modeling and simulation using Matlab calculations . Calculations and experiments agree well for micro- rotor design and experimental optical drive provides a theoretical basis for further optimization . 3 Self- build a set of fiber optical tweezers system , and use this system successfully capture a single microsphere experimental study . Multi-target complex systems the optical tweezers optical manipulation automatic control design is an important content of the width of the travel path involves particle control , while the micro- optical drive of the rotor in the field of MEMS drive without damage to provide an effective means for this study results for the optical tweezers technology and research work in the field of in-depth development has laid a good foundation.

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