Near-field calculation based on the T-matrix method with discrete sources

被引：15
|
作者：
Forestiere, Carlo [1 ]
Iadarola, Giovanni [1 ]
Dal Negro, Luca [2 ,3 ]
Miano, Giovanni [1 ]
机构：
[1] Univ Naples Federico II, Dept Elect Engn, I-80125 Naples, Italy
[2] Boston Univ, Dept Elect & Comp Engn, Boston, MA 02215 USA
[3] Boston Univ, Photon Ctr, Boston, MA 02215 USA
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2011年 / 112卷 / 14期
关键词：
Null-field method; T-matrix; Near-field; Plasmonics; SERS; Nanoparticles; DIPOLE APPROXIMATION; LIGHT-SCATTERING; NANOPARTICLES; SURFACE; GRAINS;
D O I：
10.1016/j.jqsrt.2011.05.009
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose a novel approach to compute the field scattered by a particle in the near-zone, in the framework of the transition matrix formulation. This method is based on the expansion of the total near-field in terms of discrete sources vector spherical wave functions and turns out to be particularly effective to model strongly elongated or flattened particles with high permittivity. The performances are evaluated on gold spheroids with several aspect ratios. This method results very useful to understand the complex behavior of enhanced plasmon fields in resonant metallic nanostructures. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2384 / 2394
页数：11
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