Evanescent wave optical trapping and transport of micro- and nanoparticles on tapered optical fibers
Evanescent wave optical trapping and transport of micro- and nanoparticles on tapered optical fibers
复制标题
DOI：
10.1016/j.jqsrt.2012.06.005
复制
发表时间：
2012-12-01
影响因子：
2.3
通讯作者：
Jones, P. H.
中科院分区：
文献类型：
--
作者：
Skelton, S. E.;Sergides, M.;Jones, P. H.
我们研究了使用锥形至微米级直径的光纤周围的消逝光场来操纵微观和纳米粒子，并提出该方案可用于区分并从而对金属纳米粒子进行排序。首先，我们在实验上展示了微米级球体沿着锥形光纤传输的概念，并测量了粒子的速度。在证明了该原理之后，我们从理论上考虑了金属纳米颗粒的光学捕获和引导的应用，其中等离子体共振的存在用于增强光学力。我们表明，由倏逝场捕获的纳米颗粒的动力学可以通过光纤模式的偏振状态来控制，并且通过使用一个以上的波长与纳米颗粒等离子体共振不同地失谐。这种方案可以潜在地用于从多分散悬浮液中选择性地捕获和输送纳米或微观材料。(C)2012爱思唯尔有限公司保留所有权利。
We investigate the manipulation of microscopic and nanoscopic particles using the evanescent optical field surrounding an optical fiber that is tapered to a micron-scale diameter, and propose that this scheme could be used to discriminate between, and thereby sort, metallic nanoparticles. First we show experimentally the concept of the transport of micron-sized spheres along a tapered fiber and measure the particle velocity. Having demonstrated the principle we then consider theoretically the application to the optical trapping and guiding of metallic nanoparticles, where the presence of a plasmon resonance is used to enhance optical forces. We show that the dynamics of the nanoparticles trapped by the evanescent field can be controlled by the state of polarization of the fiber mode, and by using more than one wavelength differently detuned from the nanoparticle plasmon resonance. Such a scheme could potentially be used for selectively trapping and transporting nano- or microscopic material from a polydisperse suspension. (C) 2012 Elsevier Ltd. All rights reserved.