Plasmonic graded nano-disks as nano-optical conveyor belt
Plasmonic graded nano-disks as nano-optical conveyor belt
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DOI：
10.1364/oe.22.019567
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发表时间：
2014-08-11
期刊：
影响因子：
3.8
通讯作者：
Ho, Ho-Pui
中科院分区：
文献类型：
--
作者：
Kang, Zhiwen;Lu, Haifei;Ho, Ho-Pui
我们提出了一种由具有分级直径的纳米盘（ND）组成的等离子体系统，用于实现纳米光学传送带。该系统包含几个 ND，其各个元件用不同的谐振波长进行编码。通过顺序切换激发源的波长和偏振，光学捕获的目标纳米颗粒可以从一个 ND 转移到另一个 ND。基于三维时域有限差分技术和麦克斯韦应力张量方法验证了该函数的可行性。我们的设计可以提供另一种构建纳米光学传送带的方法，通过该传送带可以在捕获位点之间传送目标分子，从而实现许多片上光流控应用。 (C) 2014年美国光学学会
We propose a plasmonic system consisting of nano-disks (NDs) with graded diameters for the realization of nano-optical conveyor belt. The system contains a couple of NDs with individual elements coded with different resonant wavelengths. By sequentially switching the wavelength and polarization of the excitation source, optically trapped target nanoparticle can be transferred from one ND to another. The feasibility of such function is verified based on the three-dimensional finite-difference time-domain technique and the Maxwell stress tensor method. Our design may provide an alternative way to construct nano-optical conveyor belt with which target molecules can be delivered between trapping sites, thus enabling many on-chip optofluidic applications. (C) 2014 Optical Society of America