DISCRETE-DIPOLE APPROXIMATION FOR SCATTERING CALCULATIONS
DISCRETE-DIPOLE APPROXIMATION FOR SCATTERING CALCULATIONS
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DOI：
10.1364/josaa.11.001491
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发表时间：
1994-04-01
影响因子：
1.9
通讯作者：
FLATAU, PJ
中科院分区：
文献类型：
--
作者：
DRAINE, BT;FLATAU, PJ
本文综述了散射计算中的离散偶极子近似（DDA），包括DDA与其它方法的关系。计算方面的考虑，即，使用复共轭梯度算法和快速傅里叶变换方法，进行了讨论。我们测试的DDA的准确性，通过使用DDA计算散射和吸收孤立的，均匀的球体，以及由两个连续的球体组成的目标。它示出，对于介电材料（m的绝对值小于或类似于2），DDA允许计算的散射和吸收是准确的几个百分点之内。
The discrete-dipole approximation (DDA) for scattering calculations, including the relationship between the DDA and other methods, is reviewed. Computational considerations, i.e., the use of complex-conjugate gradient algorithms and fast-Fourier-transform methods, are discussed. We test the accuracy of the DDA by using the DDA to compute scattering and absorption by isolated, homogeneous spheres as well as by targets consisting of two contiguous spheres. It is shown that, for dielectric materials (Absolute value of m less than or similar to 2), the DDA permits calculations of scattering and absorption that are accurate to within a few percent.