Optical Theorem for Multipole Sources in Wave Diffraction Theory

被引：5

作者：

Eremin, Yu. A. ^{[1
]}

Sveshnikov, A. G. ^{[2
]}

机构：

[1] Moscow MV Lomonosov State Univ, Fac Computat Math & Cybernet, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119991, Russia

来源：

ACOUSTICAL PHYSICS | 2016年 / 62卷 / 03期

关键词：

optical theorem; multipole source; Purcell factor; scatterer in a half-space; LIGHT-SCATTERING; PARTICLES; FIELD;

D O I：

10.1134/S1063771016030064

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The optical theorem is generalized to the case of local body excitation by multipole sources. It is found that, to calculate the extinction cross section, it is sufficient to calculate the scattered field derivatives at a single point. It is shown that the Purcell factor, which is a rather important parameter, can be represented in analytic form. The result is generalized to the case of a local scatterer incorporated in a homogeneous half-space.

引用

页码：263 / 268

页数：6

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