Numerical considerations on control of motion of nanoparticles using scattering field of laser light
Numerical considerations on control of motion of nanoparticles using scattering field of laser light
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DOI：
10.1016/j.optlastec.2016.11.016
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发表时间：
2017-05
影响因子：
5
通讯作者：
N. Yokoi;Y. Aizu
中科院分区：
文献类型：
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作者：
N. Yokoi;Y. Aizu
目前提出的大多数光学操纵技术都依赖于精心制作的装置和样品。类似的条件可以在实验室中固定；然而，在环境控制不佳且事先未知的情况下，如何操纵纳米粒子仍然是一个挑战。然而，被粗糙物体散射的相干光产生的散斑图案是由具有明确统计特性的随机干涉散斑颗粒组成的。在本研究中，我们用数值方法研究了悬浮在水中的布朗粒子在散斑图案照射下的运动。定量估计粒子捕获时间和粒子捕获区域的大小与光力和散斑直径的关系，以确认本方法执行捕获和引导等光学操作任务的可行性。
Most of optical manipulation techniques proposed so far depend on carefully fabricated setups and samples. Similar conditions can be fixed in laboratories; however, it is still challenging to manipulate nanoparticles when the environment is not well controlled and is unknown in advance. Nonetheless, coherent light scattered by rough object generates a speckle pattern which consists of random interference speckle grains with well-defined statistical properties. In the present study, we numerically investigate the motion of a Brownian particle suspended in water under the illumination of a speckle pattern. Particle-captured time and size of particle-captured area are quantitatively estimated in relation to an optical force and a speckle diameter to confirm the feasibility of the present method for performing optical manipulation tasks such as trapping and guiding.