Controlled rotation of optically trapped microscopic particles
Controlled rotation of optically trapped microscopic particles
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DOI：
10.1126/science.1058591
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发表时间：
2001-05-04
期刊：
影响因子：
56.9
通讯作者：
Dholakia, K
中科院分区：
文献类型：
--
作者：
Paterson, L;MacDonald, MP;Dholakia, K
我们演示了控制旋转的光学捕获的物体在螺旋干涉图案。该图案通过使环形激光束与参考光束干涉而产生。物体被困在图案的旋臂中。改变光路长度会导致这个图案旋转，从而导致被捕获的物体旋转。二氧化硅微球、显微镜下的玻璃棒和染色体的结构以超过5赫兹的速度旋转。这种技术不依赖于被捕获粒子的固有特性，因此在光学和生物微机械中提供了重要的应用。
We demonstrate controlled rotation of optically trapped objects in a spiral interference pattern. This pattern is generated by interfering an annular shaped laser beam with a reference beam. Objects are trapped in the spiral arms of the pattern. Changing the optical path length causes this pattern, and thus the trapped objects, to rotate. Structures of silica microspheres, microscopic glass rods, and chromosomes are set into rotation at rates in excess of 5 hertz. This technique does not depend on intrinsic properties of the trapped particle and thus offers important applications in optical and biological micromachines.