Analysis and Application of Optical Vortex Array Laser Beam Tweezers in Microfluidics

• Main Authors: Yi-YuLu, 盧奕宇
• Other Authors: Shu-Chun Chu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/85230652228499743001

碩士 === 國立成功大學 === 物理學系碩博士班 === 101 === This thesis use the MATLAB software to construct simulation model based on the hydrodynamics. The simulation model can simulate the particle trajectory in the fluids under various optical fields. This thesis discussed the application and the properties of optical vortex array laser beam tweezers in microfluidics using the constructed simulation model. This thesis discussed two main issues. Firstly, this thesis analyzed various factors to the particle-tapping in microfluids with vortex array laser optical tweezers, such as laser power, microfluid velocity, beam waist size, particle size, and the influence of the scaling of the system. This thesis also compares the properties of vortex array laser beam tweezers in microfluids with the traditional Gaussian beam tweezers. Lastly, this thesis designs and simulates two kinds of particle-separation systems using the properties of vortex array laser beam tweezers in microfluids. The two particle-separation systems are non-continuous and continuous particle-separation systems, respectively. The non-continuous particle-separation system was designed based on the trapping force difference between particles of different sizes in the same optical field. The particles of different size in the microfluid will not be trapped by the optical tweezers at the same time while the microfluids are flowing with a certain velocity. The continuous particle-separation system separates particles of different size using the trapping locations difference between particles of different size. The study results of this thesis will be helpful to the future experiments of building up vortex array laser beam tweezers and the development of vortex array laser beam-based particle-separation system.