In depth fiber optic trapping of low-index microscopic objects
In depth fiber optic trapping of low-index microscopic objects
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DOI：
10.1063/1.2908216
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发表时间：
2008-04-14
影响因子：
4
通讯作者：
Degiorgio, V.
中科院分区：
文献类型：
--
作者：
Mohanty, K. S.;Liberale, C.;Degiorgio, V.
我们证明，与使用高数值孔径显微镜物镜产生的涡旋光束镊子相比，通过建立在单模光纤尖端上的微轴棱镜的聚焦光束可以在更大的深度捕获低折射率物体。发现在米氏体系中测量的低折射率物体的横向捕获力取决于颗粒尺寸以及捕获物体与光纤尖端的距离。虽然被捕获的低折射率物体的轴向移动是通过改变捕获光束功率来实现的，但在三个维度上的传输是通过操纵光纤来实现的。 (C) 2008 年美国物理研究所。
We demonstrate that a focused beam through a microaxicon built on the tip of a single mode optical fiber can trap low-index objects at much larger depths as compared to the vortex beam tweezers generated using high numerical aperture microscope objectives. The measured transverse trapping force for low-index objects in Mie regime was found to depend on particle size and on distance of trapped objects from the fiber tip. While axial movement of trapped low-index objects was achieved by variation in trap beam power, transportation in three dimensions was achieved by maneuvering the fiber. (C) 2008 American Institute of Physics.