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arXiv 2001.03489physics.optics
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具有纯高阶多极散射的工程纳米粒子

Engineering nanoparticles with pure high-order multipole scattering

Vladimir A. Zenin, Cesar E. Garcia-Ortiz, Andrey B. Evlyukhin, Yuanqing Yang, Radu Malureanu, Sergey M. Novikov, Victor Coello, Boris N. Chichkov, Sergey I. Boz… 展开作者

Vladimir A. Zenin, Cesar E. Garcia-Ortiz, Andrey B. Evlyukhin, Yuanqing Yang, Radu Malureanu, Sergey M. Novikov, Victor Coello, Boris N. Chichkov, Sergey I. Bozhevolnyi, Andrei V. Lavrinenko, N. Asger Mortensen

摘要:

控制纳米粒子的散射方向性的能力对于许多纳米光子应用是高需求的。挑战之一是设计产生纯高阶多极散射的纳米颗粒(例如,八极,十六极),其贡献与强低阶多极散射(即,偶极或四极)。在这里,我们提出了一种直观的方法来设计这样的纳米粒子,通过在它们内部引入空隙。我们表明,壳和环纳米结构允许制度与近纯高阶多极散射。实验测得的散射图从适当设计的硅环在近红外波长(~ 800 nm)再现以及电八极和磁十六极的散射模式。我们的研究结果显着推进从给定的复杂散射特性的纳米粒子的逆向工程,在生物传感,光学超颖表面和量子通信的可能应用。

英文摘要:

The ability to control scattering directionality of nanoparticles is in high demand for many nanophotonic applications. One of the challenges is to design nanoparticles producing pure high-order multipole scattering (e.g., octopole, hexadecapole), whose contribution is usually negligible compared to strong low-order multipole scattering (i.e., dipole or quadrupole). Here we present an intuitive way to design such nanoparticles by introducing a void inside them. We show that both shell and ring nanostructures allow regimes with nearly pure high-order multipole scattering. Experimentally measured scattering diagrams from properly designed silicon rings at near-infrared wavelengths (~ 800 nm) reproduce well scattering patterns of an electric octopole and magnetic hexadecapole. Our findings advance significantly inverse engineering of nanoparticles from given complex scattering characteristics, with possible applications in biosensing, optical metasurfaces, and quantum communications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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