首页> 外文会议>Conference on Imaging, Manipulation, and Analysis of Biomolecules, Cells, and Tissues II; 20040127-20040128; San Jose,CA; US >Multiple doughnut beams for trapping and dynamic manipulation of low-index microstructures
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Multiple doughnut beams for trapping and dynamic manipulation of low-index microstructures

机译:多个甜甜圈束用于低折射率微结构的捕获和动态操纵

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We demonstrate the use of independently controlled doughnut beams for trapping and manipulation of an array of low-index microstructures. These types of particles are generally difficult to handle using conventional optical traps due to the inverse effect of the gradient force, which repels the particles from the region of stronger light intensity. The configurable multiple doughnut beams are generated using a nearly loss-less phase-to-intensity conversion of a phase-encoded collimated coherent light source. The two-dimensional phase distribution corresponding to the optical trap pattern is encoded using a computer-programmable spatial light modulator enabling each trap to be moved arbitrarily along the transverse direction. Experiments show trapping and manipulation of hollow "air-filled" glass micro-spheres suspended in aqueous medium.
机译:我们展示了使用独立控制的甜甜圈束来捕获和处理低折射率微结构阵列。由于梯度力的反作用,这些类型的颗粒通常难以使​​用常规的光阱来处理,这会从较强的光强度区域排斥颗粒。可配置的多个环形光束是使用相位编码的准直相干光源的几乎无损耗的相位到强度转换生成的。使用计算机可编程的空间光调制器对与光阱图案相对应的二维相位分布进行编码,该空间光调制器使每个光阱能够沿横向任意移动。实验表明,悬浮和悬浮在水性介质中的空心“充气”玻璃微球的捕获和处理。

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