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首页> 外文会议>Conference on Optical Sensing, Imaging, and Manipulation for Biological and Biomedical Applications 26-28 July 2000 Taipei, Taiwan >Numerical analysis of near-field optical trapping using tapered fiber probe
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Numerical analysis of near-field optical trapping using tapered fiber probe

机译：锥形光纤探针近场光阱的数值分析

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摘要

A new scheme for optical trapping is presented in this paper. The method is based on a tapered fiber probe with a tip diameter less than a light wavelength. A three-dimension gradient optical field is formed within the optical near field of the fiber probe, and a particle approaching the fiber probe tip will be trapped. The evanescent electromagnetic field in the vicinity of the fiber tip is calculated by the multiple multipole method (MMP). The intensity distributions and the trapping potential of the near fields of the tip versus the longitudinal and transverse distances from the tip are analyzed respectively. The trapping force is obtained for a dielectric particle. The numerical calculating results show the availability of this method.
机译：本文提出了一种新的光阱方案。该方法基于尖端直径小于光波长的锥形光纤探针。在光纤探针的光学近场内会形成一个三维梯度光场，并且接近光纤探针尖端的粒子将被捕获。光纤尖端附近的van逝电磁场是通过多多极方法（MMP）计算的。分别分析了尖端近场的强度分布和俘获势与距尖端的纵向和横向距离的关系。获得了介电粒子的俘获力。数值计算结果表明了该方法的可行性。

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