Geometric tailoring of plasmonic nanotips for atom traps
Geometric tailoring of plasmonic nanotips for atom traps
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DOI：
10.1103/physreva.90.013421
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发表时间：
2014-07-29
影响因子：
2.9
通讯作者：
Meixner, A. J.
中科院分区：
文献类型：
--
作者：
Mihaljevic, J.;Slama, S.;Meixner, A. J.
我们从理论上分析了等离子体纳米尖端光学捕获中性原子的方案。开发了一个分析准静态模型，用于研究成功生成陷阱所需的几何形状和材料参数的要求。然后，我们使用麦克斯韦方程组的数值解来研究不同类型的尖端，并实现了距尖端顶点 90 nm 处的光捕获势。提出了数值结果的偶极近似，允许以简单的形式捕获基本的陷阱特征。最后，我们分析了示例性纳米尖端的散射率、陷阱特性和加热，揭示了散热对于所考虑的结构的重要性。
We theoretically analyzed a scheme for optical trapping of neutral atoms by plasmonic nanotips. An analytic quasistatic model was developed for studying the requirements on geometry and material parameters needed for a successful trap generation. We then used the numerical solution of Maxwell's equations to study different types of tips and realized optical trapping potentials at distances of up to 90 nm away from the tip apex. A dipole approximation of numerical results is presented, allowing for capturing essential trap characteristics in a simple form. Finally, we analyze scattering rates, trap characteristics, and heating of an exemplary nanotip, revealing the importance of heat dissipation for the considered structures.