Optical levitation and translation of a microscopic particle by use of multiple beams generated by vertical-cavity surface-emitting laser array sources.
Optical levitation and translation of a microscopic particle by use of multiple beams generated by vertical-cavity surface-emitting laser array sources.
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利用垂直腔表面发射激光阵列源产生的多束光束实现微观粒子的光学悬浮和平移。
DOI：
10.1364/ao.41.005645
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发表时间：
2002
期刊：
影响因子：
1.9
通讯作者：
J. Tanida
中科院分区：
文献类型：
--
作者：
Y. Ogura;N. Shirai;J. Tanida
研究了一种利用多束光的合力实现微小粒子悬浮和平移的方法。通过数值计算，我们发现辐射压力与照明分布的依赖关系，我们发现最强的轴向力是由特定的照明光束的间隔周期。通过垂直腔表面发射激光器（VCSEL）阵列源[Appl.Opt.40，5430（2001）]扩展光学操纵技术，据我们所知，我们是第一个证明粒子的悬浮及其在通过使用VCSEL阵列悬浮时的平移的人。实验结果表明，采用多光束照明是一种有效的悬浮粒子的方法，且总照明功率较低。讨论了多光束操纵方法中的一些问题。
An optical levitation and translation method for a microscopic particle by use of the resultant force induced by multiple light beams is studied. We show dependence of the radiation pressure force on the illuminating distribution by numerical calculation, and we find that the strongest axial force is obtained by a specific spacing period of illuminating beams. Extending the optical manipulation technique by means of vertical-cavity surface-emitting laser (VCSEL) array sources [Appl. Opt. 40, 5430 (2001)], we are the first, to our knowledge, to demonstrate levitation of a particle and its translation while levitated by using a VCSEL array. The vertical position of the target particle can be controlled in a range of a few tens of micrometers with an accuracy of 2 microm or less. The analytical and experimental results suggest that use of multiple beams is an effective method to levitate a particle with low total illumination power. Some issues on the manipulation method that uses multiple beams are discussed.