音视频-图像处理-矢量光场与光镊的研究.pdf

采用一种基于时域有限差分(FDTD)的数值算法,仿真计算了抛物线形和大锥角形两种新型单光纤光镊的出射光场,并在稳态场下通过对麦克斯韦应力张量积分求得介质球在两种光场中受到的光阱力,得到大锥角型光纤端产生的光阱力较大的结论; 讨论了不同介质球大小、折射率,光纤探针形状对光阱力的影响。在实验中这两种光纤探针都实现了对水中酵母菌细胞的捕获,且采用流体力学法对抛物线形和大锥角形二种新型单光纤光镊产生的光阱力进行了标定。结果表明：基于FDTD数值仿真方法计算受力与实验结果一致,并且这种计算光纤光镊产生的光阱力的方法简单,适用; 且抛物线形和大锥角形光纤探头都具备构成单光纤光镊的条件。

光镊工具箱可用于在矢量球面波基中使用 T 矩阵形式来计算粒子的光学力和扭矩。 该工具箱包括用于计算 T 矩阵的代码、由矢量球面波函数描述的梁、用于计算力和扭矩的函数、用于模拟动力学的简单代码和示例。

matlab光镊力数值模拟

近场光镊是近场光学领域中的新型技术，因其可对纳米尺度微粒直接进行捕获和操纵而受到广泛关注。简述了该技术的原理，详细介绍了近场光镊技术的研究进展及其在众多学科领域中的潜在应用。

An efficient and inexpensive method that uses a glass plate mounted onto a motorized rotating stage as a beam-steering device for the generation of dynamic optical traps is reported. Force analysis reveals that there are drag and trapping forces imposed on the bead in the opposite directions, respectively, in a viscous medium. The trapped bead will be rotated following the beam’s motion before it reaches the critical escape velocity when the drag force is equal to the optical trapping force. The

Different types of femtosecond optical tweezers have become a powerful tool in the modern biological field. However, how to control the irregular targets, including biological cells, using femtosecond optical tweezers remains to be explored. In this study, human red blood cells (hRBCs) are manipulated with femtosecond optical tweezers, and their states under different laser powers are investigated. The results indicate that optical potential traps only can capture the edge of hRBCs under the las

用该工具箱可以计算10分1波长到10被波长的粒子的光散射导致的光钳力。Matlab程序编的超有水平。