Longer axial trap distance and larger radial trap stiffness using a double-ring radially polarized beam.
Longer axial trap distance and larger radial trap stiffness using a double-ring radially polarized beam.
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DOI：
10.1364/ol.35.001281
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发表时间：
2010-04
期刊：
影响因子：
3.6
通讯作者：
Yaoju Zhang;T. Suyama;Biaofeng Ding
中科院分区：
文献类型：
--
作者：
Yaoju Zhang;T. Suyama;Biaofeng Ding
本文计算了双环形径向偏振光束作用于金属瑞利粒子的光阱力。研究了粒子离轴距离和离焦距离对粒子捕获力的影响。与传统的单环径向偏振光束相比，双环径向偏振光束具有更长的轴向陷阱距离和更大的径向陷阱刚度.这些特征对于提高需要较长轴向阱距的光阱系统的捕获能力是有用的。
The optical trapping forces acting on a metallic Rayleigh particle are calculated for the case where a double-ring-shaped radially polarized beam is applied. The influence of the off-focus distance and the off-axis distance of a trapping particle on the trapping force is investigated. Compared with the use of the conventional single-ring-shaped radially polarized beam, the longer axial trap distance and the larger radial trap stiffness are predicted using a double-ring-shaped radially polarized beam in an optical trap. These features are useful for improving the trapping ability of an optical trap system where a longer axial trap distance is needed.