Creation of a three-dimensional optical chain for controllable particle delivery.
Creation of a three-dimensional optical chain for controllable particle delivery.
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DOI：
10.1364/ol.30.000848
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发表时间：
2005-04
期刊：
影响因子：
3.6
通讯作者：
Yiqiong Zhao;Q. Zhan;Yanli Zhang;Yongpin Li
中科院分区：
文献类型：
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作者：
Yiqiong Zhao;Q. Zhan;Yanli Zhang;Yongpin Li
我们提出了一种设计，用于生产可传送的准周期光学链，该光学链可以在焦点附近的不同平面上稳定地捕获和传送三个维度的多个单独粒子。衍射光学元件 (DOE) 设计用于对入射径向偏振光束的相位进行空间调制。对于紧密聚焦的光束，由于 DOE 两个同心区域的古伊相移存在差异，因此可以形成三维 (3D) 光链。在这种捕获结构中，可以通过单独的 3D 体积，一一稳定地夹取所需数量的颗粒。通过控制入射光束的相位调制，人们可以操纵干涉图案，以规定的方式沿光轴加速和传输捕获的粒子。
We propose a design for producing a conveyable quasi-periodic optical chain that can stably trap and deliver multiple individual particles in three dimensions at different planes near the focus. A diffractive optical element (DOE) is designed to spatially modulate the phase of an incoming radially polarized beam. For a tighly focused beam, a three-dimensional (3D) optical chain can be formed because of the difference in the Gouy phase shift from two concentric regions of the DOE. A desired number of particles can be stably tweezed one by one with individual 3D volumes in this trapping structure. By controlling the phase modulation of the incident beam, one can manipulate the interference pattern to accelerate and transport trapped particles along the optical axis in a prescribed way.