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首页> 外文期刊>IEEE transactions on nanotechnology >Nanocircuits and Nanoimpedances of Nonmagnetic Plasmonic Nanoparticles From the Mie Theory Point of View
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Nanocircuits and Nanoimpedances of Nonmagnetic Plasmonic Nanoparticles From the Mie Theory Point of View

机译:从米氏理论的角度看非磁性等离子体纳米粒子的纳米电路和纳米阻抗

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摘要

In this study, we show how the Mie theory fits into the recently proposed nanocircuitry for a spherical nanoscatterer. Because this theory must give the same results for the scattering problem as those provided by the dipole approximation, regardless of any particular electromagnetic response functions, a comparison is made between these two approaches for the internal and fringing nanoimpedances associated with the scattering of dielectric and plasmonic spheres. It is shown that, because of plasmonic resonances observed when the real part of the permittivity assumes a negative value, the simple dipole model, usually reliably adopted in the conventional positive refractive index case, must be used with care. This extends some previous works and provides a more complete picture of the physical nanoimpedance associated with the fringing fields, specially at the plasmonic resonances.
机译:在这项研究中,我们展示了Mie理论如何适合最近提出的球形纳米散射体的纳米电路。由于该理论对于散射问题必须给出与偶极近似所提供的结果相同的结果,而不考虑任何特定的电磁响应函数,因此对这两种方法的内部和边缘纳米阻抗与介电和等离子体散射相关的方法进行了比较。领域。结果表明,由于当介电常数的实部为负值时观察到的等离子体共振,必须谨慎使用通常在常规正折射率情况下可靠采用的简单偶极子模型。这扩展了以前的一些工作,并提供了与边缘场相关的物理纳米阻抗的更完整图片,特别是在等离子体共振中。

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