A Boundary Integral Equation Scheme For Simulating The Nonlocal Hydrodynamic Response Of Metallic Antennas At Deep-Nanometer Scales

Keywords

Computational electromagnetics (EMs); deep-nanometer nanoantennas; nonlocal material response; plasmonics

Abstract

Modeling the interaction between light and a plasmonic nanoantenna, whose critical dimension is of a few nanometers, is complex owing to the 'hydrodynamic' motion of free electrons in a metal. Such a hydrodynamic effect inevitably leads to a nonlocal material response, which enables the propagation of longitudinal electromagnetic waves in the material. In this paper, within the framework of a boundary integral equation and a method of moments algorithm, a computational scheme is developed for predicting the interaction of light with 3-D nonlocal hydrodynamic metallic nanoparticles of arbitrary shape. The numerical implementation is first demonstrated for the test example of a canonical spherical structure. The calculated results are shown to be in the excellent agreement with the theoretical results obtained with the generalized Mie theory. In addition, the capability of treating 3-D structures of general shapes is demonstrated by ellipsoids and dimers.

Publication Date

9-1-2018

Publication Title

IEEE Transactions on Antennas and Propagation

Volume

66

Issue

9

Number of Pages

4759-4771

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/TAP.2018.2851290

Socpus ID

85049348065 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85049348065

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