Mishchenko Michael I, Yurkin Maxim A, Cairns Brian
NASA Goddard Institute for Space Studies, 2880 Broadway, New York, NY 10025, USA.
Voevodsky Institute of Chemical Kinetics and Combustion SB RAS, Institutskaya Str. 3, 630090, Novosibirsk, Russia.
OSA Contin. 2019 Aug 15;2(8):2362-2368. doi: 10.1364/OSAC.2.002362. Epub 2019 Jul 23.
We use the volume integral equation formulation to consider frequency-domain electromagnetic scattering of a damped inhomogeneous plane wave by a particle immersed in an absorbing medium. We show that if absorption in the host medium is sufficiently weak and the particle size parameter is sufficiently small, then (i) the resulting formalism (including the far-field and radiative-transfer regimes) is largely the same as in the case of a nonabsorbing host medium, and (ii) one can bypass explicit use of sophisticated general solvers of the Maxwell equations applicable to inhomogeneous-wave illumination. These results offer dramatic simplifications for solving the scattering problem in a wide range of practical applications involving absorbing host media.
我们使用体积积分方程公式来考虑沉浸在吸收介质中的粒子对阻尼非均匀平面波的频域电磁散射。我们表明,如果主体介质中的吸收足够弱且粒子尺寸参数足够小,那么(i)所得形式体系(包括远场和辐射传输区域)与非吸收主体介质的情况基本相同,并且(ii)可以避免显式使用适用于非均匀波照明的复杂麦克斯韦方程组通用求解器。这些结果为解决涉及吸收主体介质的广泛实际应用中的散射问题提供了极大的简化。