Extinction and polarization of radiation by absorbing spheroids: shape/size effects and benchmark results
Extinction and polarization of radiation by absorbing spheroids: shape/size effects and benchmark results
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DOI：
10.1016/s0022-4073(99)00159-4
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发表时间：
2000-06-15
影响因子：
2.3
通讯作者：
Farafonov, VG
中科院分区：
文献类型：
--
作者：
Voshchinnikov, NV;Il'in, VB;Farafonov, VG
本文用分离变量法和T矩阵法计算了折射率从m = 1.3 + 0.0i到3 + 4 i的均匀椭球体的光学性质。发现高吸收球体的消光截面通常比相同体积球体的消光截面大1.5-2倍。非球形颗粒的折射率略微取决于颗粒形状，并且主要由折射率的虚部决定。从某种尺寸开始，球状粒子不吸收透射辐射，而与它们的形状无关。我们还提出了一种新的方法，轴对称粒子，它将联合收割机的强大方面，上述两种方法，并给出了几个值的横截面作为基准表的形式。(C)2000爱思唯尔科技有限公司版权所有。
We use the separation of variables and T-matrix methods to calculate the optical properties of homogeneous spheroids with refractive indices from m = 1.3 + 0.0i up to 3 + 4i. It is found that the extinction cross-sections for highly absorbing spheroids are normally 1.5-2 times larger than those for spheres of the same volume. The albedo of the non-spherical particles rather slightly depends on the particle shape and is mainly determined by the imaginary part of the refractive index. Beginning at some size, the spheroidal particles do not polarize the transmitted radiation independent of their shape. We also suggest a new approach for axisymmetric particles which would combine the strong aspects of both methods mentioned above and give several values of the cross-sections as benchmarks in tabular form. (C) 2000 Elsevier Science Ltd. All rights reserved.