• Optics express · Aug 2014

    Plasmonic graded nano-disks as nano-optical conveyor belt.

    • Zhiwen Kang, Haifei Lu, Jiajie Chen, Kun Chen, Fang Xu, and Ho-Pui Ho.
    • Opt Express. 2014 Aug 11;22(16):19567-72.

    AbstractWe 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 nano-particle 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.

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