双光束光纤光阱特性研究
论文编号:WLX091 字数:8608,页数:19摘要 本课题对双光束光纤光阱系统进行了深入的理论研究，阐述了激光捕获技术的模型和原理以及系统的基本结构；介绍了激光捕获技术在生命科学领域的应用；追踪了激光捕获技术的应用和最新研究进展；展望了激光捕获技术的发展前景。在几何光学近似下,对米氏球状粒子所受轴向光阱力进行了数值计算。仿真结果给出了捕获区域轴向力和光镊系统主要参数的关系。以及横向力和光镊系统主要参数的关系。从而得出捕获区域平衡点的分布，进一步提高系统微操纵的灵活性和精确性。关键词: 激光捕获；光镊；光阱力；辐射力；梯度力；散射力ABSTRACT Dual fiber optical tweezers is theoretically analyzed in this dissertation. The capture range and the curves of simulation are shown. The models and principles of laser trapping technique are reviewed. The basic system setup is introduced. Laser trapping technique is introduced in the application of life sciences. The characteristics of each approach are analyzed. The prospects or further development are discussed. Under the approximation of geometric optics, the axial force exerted on the Mie microsphere particles is simulated. The result shows that the relationship between axial force and main parameters of laser trapping system. and the relationship between transverse force and main parameters of laser trapping system. So as to acquire the distribution of regional balance, and improve the system of micro-manipulation of the flexibility and accuracy. Keywords: optical trap; optical tweezers; optical trap force; radiation force; gradient force; scattering force 目 录中文摘要 i英文摘要 ii目录 …………………………………………………………………………………………iii第一章 绪论 1.1概述 ………………………………………………………………………………… 1 1.2光镊技术产生与发展………………………………………………………………… 1 1.3光镊技术的应用 …………………………………………………………………… 2 第二章 光镊原理 2.1光镊的定义 …………………………………………………………………………3 2.2光镊原理与概述 ……………………………………………………………………3 2.2.1 光辐射压力 …………………………………………………………………3 2.2.2 散射力与梯度力 ……………………………………………………………3 2.2.3几何光学模型 ………………………………………………………………4 2.3 本章小结 …………………………………………………………………………6第三章 双光束光纤光阱的力学效应仿真 3.1仿真模型 ………………………………………………………………………………7 3.2轴向力仿真分析 ………………………………………………………………………8 3.3径向力分析 ……………………………………………………………………………9 3.4本章小结 ……………………………………………………………………………11第四章 双光束光纤光阱的实验系统 4.1实验系统简介 ………………………………………………………………………12 4.2双光束光纤系统研究 ………………………………………………………………13第五章 结论 ……………………………………………………………………………………15致谢 ………………………………………………………………………………………………16参考文献 …………………………………………………………………………………………17
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