Selective photodeposition of zinc nanoparticles on the core of a single-mode optical fiber
Selective photodeposition of zinc nanoparticles on the core of a single-mode optical fiber
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DOI：
10.1364/oe.21.006509
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发表时间：
2013-03-11
期刊：
影响因子：
3.8
通讯作者：
Ramos-Garcia, R.
中科院分区：
文献类型：
--
作者：
Ortega-Mendoza, J. G.;Chavez, F.;Ramos-Garcia, R.
对金属锌纳米粒子在光纤端面上的选择性光沉积进行了实验和理论研究。众所周知，金属纳米颗粒具有高吸收系数，因此捕获和操纵比电介质颗粒更具挑战性。在这里，我们展示了一种新的捕获机制，涉及激光诱导的对流（由于从锌颗粒的热传递），部分地补偿在光纤端附近的吸收和散射力。梯度力太小，对沉积过程不起作用。这些力的相互作用产生颗粒的选择性沉积，其尺寸直接由激光功率控制。此外，一种新的捕获机制，称为对流光学捕获证明。(c)2013年美国光学学会
An experimental and theoretical study about selective photodeposition of metallic zinc nanoparticles onto an optical fiber end is presented. It is well known that metallic nanoparticles possess a high absorption coefficient and therefore trapping and manipulation is more challenging than dielectric particles. Here, we demonstrate a novel trapping mechanism that involves laser-induced convection flow (due to heat transfer from the zinc particles) that partially compensates both absorption and scattering forces in the vicinity of the fiber end. The gradient force is too small and plays no role on the deposition process. The interplay of these forces produces selective deposition of particles whose size is directly controlled by the laser power. In addition, a novel trapping mechanism termed convective-optical trapping is demonstrated. (c) 2013 Optical Society of America