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Integrated plasmonic dimers: a platform for ultra-efficient trapping of nanoparticles

机译：集成等离子体二聚体：用于超高效纳米颗粒的平台

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In this contribution, the efficient trapping of low refractive index nanoparticles, with radii down to 50 nm, is numerically demonstrated in gold dimers coupled with SOI waveguides. This coupled scheme provides a strong excitation of the plasmonic resonators [1] that, in combination with the field enhancement occurring in dimers, leads to an ultra-efficient trapping. Without any needs of cumbersome optical elements, this excitation scheme does not affect the overall portability of the system and stands out as a perfect candidate for integration inside microfluidic systems [2], for nanoparticle immobilisation and analysis. The possibility to trap smaller nanoparticle, with radii down to 5 nm, having higher refractive index will be discussed. The impact of the geometrical parameters of the dimer on the optomechanical well stiffness and depth, the optimisation strategies, the simple fabrication approach and the ongoing experimental demonstration will be as well detailed.
机译：在该贡献中，在与SOI波导偶联的金二聚体中，有效地捕获低折射率纳米颗粒的低折射率纳米颗粒。该耦合方案提供了质子谐振器的强烈激发，即与在二聚体中发生的现场增强相结合，导致超高效的捕获。如果没有任何繁琐的光学元件的需要，这种激励方案不会影响系统的整体携带性，并突出作为微流体系统内集成的完美候选者[2]，用于纳米颗粒固定和分析。将讨论将较小纳米颗粒捕获较小纳米颗粒，其具有较高折射率的半径下降至5nm。二聚体几何参数对光学力学井刚度和深度，优化策略，简单的制造方法和正在进行的实验示范的影响将是详细的。

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