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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Photoacoustic tweezers with a pulsed laser: theory and experiments
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Photoacoustic tweezers with a pulsed laser: theory and experiments

机译：脉冲激光光声镊子：理论与实验

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摘要

A novel noninvasive optical technique for manipulating particles and cells is presented that utilizes laser-generated forces in an absorbing medium surrounding the particles or cells. In this technique, a laser pulse creates near-object acoustic waves, which during interaction with the objects lead to then being moved or trapped. The main optical schemes are considered, and a theory is presented for this new optical tool, namely photoacoustic (PA) tweezer with pulsed laser. The magnitudes of forces acting on polystyrene particles suspended in water were estimated as a function of the particles' properties for circular and ring geometries of the laser beam. Results of our preliminary experiments demonstrated proof that the manipulation, trapping and even rotation of cells is possible with PA tweezers.
机译：提出了一种用于操纵颗粒和细胞的新型非侵入性光学技术，该技术利用了激光在颗粒或细胞周围吸收介质中产生的力。在这种技术中，激光脉冲会产生近物体声波，在与物体相互作用期间会导致其被移动或捕获。考虑了主要的光学方案，并为这种新型光学工具提出了一种理论，即带有脉冲激光的光声（PA）镊子。估计作用在悬浮在水中的聚苯乙烯颗粒上的力的大小是该颗粒的圆形和环形几何形状的特性的函数。我们的初步实验结果证明，使用PA镊子可以操纵，捕获甚至旋转细胞。

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