Holographic Plasmonic Nanotweezers for Dynamic Trapping and Manipulation
Holographic Plasmonic Nanotweezers for Dynamic Trapping and Manipulation
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DOI：
10.1021/acs.nanolett.7b04289
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发表时间：
2017-12-01
期刊：
影响因子：
10.8
通讯作者：
Lindquist, Nathan C.
中科院分区：
文献类型：
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作者：
Huft, Preston R.;Kolbow, Joshua D.;Lindquist, Nathan C.
我们演示了动态捕获和操纵的纳米粒子与等离子体全息图。通过用计算机控制的空间光调制器定制入射光束的照明图案，等离子体波的相长干涉和相消干涉产生可以在表面上移动的聚焦热点。具体而言，计算机生成的全息图照亮银牛眼纳米结构的周边，产生向中心传播的表面等离子体。作为空间的函数移动等离子体波的相位可以完全控制焦点的位置。我们发现，200 nm直径的纳米粒子被困在这个焦点可以在任意模式移动。例如，这允许线性偏振光的圆周运动。这些结果显示了全息产生的表面等离子体波的多功能性，先进的捕获和纳米粒子的操纵。
We demonstrate dynamic trapping and manipulation of nanoparticles with plasmonic holograms. By tailoring the illumination pattern of an incident light beam with a computer-controlled spatial light modulator, constructive and destructive interference of plasmon waves create a focused hotspot that can be moved across a surface. Specifically, a computer-generated hologram illuminating the perimeter of a silver Bull's Eye nanostructure generates surface plasmons that propagate toward the center. Shifting the phase of the plasmon waves as a function of space gives complete control over the location of the focus. We show that 200 nm diameter nanoparticles trapped in this focus can be moved in arbitrary patterns. This allows, for example, circular motion with linearly polarized light. These results show the versatility of holographically generated surface plasmon waves for advanced trapping and manipulation of nanoparticles.