Discrete-dipole approximation for periodic targets: theory and tests
Discrete-dipole approximation for periodic targets: theory and tests
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DOI：
10.1364/josaa.25.002693
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发表时间：
2008-11-01
影响因子：
1.9
通讯作者：
Flatau, Piotr J.
中科院分区：
文献类型：
--
作者：
Draine, Bruce T.;Flatau, Piotr J.
离散偶极子近似（DDA）是一种计算目标吸收和散射的有效方法，目标的尺寸小于或等于入射辐射的波长。DDA可以扩展到单周期或双周期的目标。我们推广的散射振幅矩阵和4 × 4的米勒矩阵来描述散射的单周期和双周期目标，并显示这些矩阵可以使用DDA计算。使用开源代码DDSCAT的DDA计算的准确性证明了与精确的结果相比，无限的圆柱体和无限的平板。使用DDA的解决方案，以获得字段内和附近的目标的方法，结果显示为无限厚的平板。(C)2008年美国光学学会
The discrete-dipole approximation (DDA) is a powerful method for calculating absorption and scattering by targets that have sizes smaller than or comparable to the wavelength of the incident radiation. The DDA can be extended to targets that are singly or doubly periodic. We generalize the scattering amplitude matrix and the 4 x 4 Mueller matrix to describe scattering by singly and doubly periodic targets and show how these matrices can be calculated using the DDA. The accuracy of DDA calculations using the open-source code DDSCAT is demonstrated by comparison with exact results for infinite cylinders and infinite slabs. A method for using the DDA solution to obtain fields within and near the target is presented, with results shown for infinite slabs. (C) 2008 Optical Society of America