| 光镊中米氏微粒子的捕捉力仿真 |
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| 引用本文： | 王晓娜,白剑,郭天太. 光镊中米氏微粒子的捕捉力仿真[J]. 中国计量学院学报, 2008, 19(3): 272-277 |
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| 作者姓名： | 王晓娜 白剑 郭天太 |
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| 作者单位： | 1. 中国计量学院,计量测试工程学院,浙江,杭州,310018
2. 浙江大学,现代光学仪器国家重点实验室,浙江,杭州,310027 |
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| 摘 要： | 为了使所建立的光镊中粒子捕捉力的数学模型适宜任意形状粒子,将米氏粒子表面离散为多个微面元,基于几何光学理论得到光线与微面元相互作用产生的光辐射压力及光线追迹方程.基于所建立的数学模型,实现了对任意形状米氏粒子(球形、圆锥形、多面体形和任意形状光滑曲面粒子)受力的计算机仿真.经过仿真分析,验证了仿真软件的正确性,从而为光镊技术在纳米测量和微细加工等的应用提供了有利的分析和设计工具.
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| 关 键 词： | 光镊 米氏粒子 任意形状 捕捉力 |
Simulation for the trapping force on Mie micro-particles in optical tweezers |
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| WANG Xiao-na,BAI Jian,GUO Tian-tai. Simulation for the trapping force on Mie micro-particles in optical tweezers[J]. Journal of China Jiliang University, 2008, 19(3): 272-277 |
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| Authors: | WANG Xiao-na BAI Jian GUO Tian-tai |
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| Affiliation: | WANG Xiao-na , BAI Jian , GUO Tian-tai(1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China; 2. State Key Laboratory of Modern Optical Instruments, Zhejiang University, Hangzhou 310027, China) |
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| Abstract: | To make the mathematical models suitable for particles with arbitrary shape, the surface of Mie particle was discreted into many micro-planes, then the radiation pressure resulting from the interaction between a single incident light and a micro-plane and a individual ray tracing was obtained using the geometrical optical theory. A computer simulation program based on this mathematical model was designed to calculate the trapping force on Mie micro-particles with arbitrary shape （sphere, cone, polyhedron and particle with smooth surface）. Many simulation analyses confirmed the validity of the software. It provides a powerful design and analysis tool for laser trapping being applied to nanometer testing and manufacturing. |
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| Keywords: | optical tweezers Mie micro-particles arbitrary shapes trapping force |
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