Lee Siu-Chun
Applied Sciences Laboratory, Inc., Baldwin Park, California 91706, USA.
J Opt Soc Am A Opt Image Sci Vis. 2011 Jun 1;28(6):1067-75. doi: 10.1364/JOSAA.28.001067.
The scattering formulation for a coated infinite cylinder in an absorbing medium is presented in this paper. The cylinder is subjected to an arbitrarily polarized plane wave propagating in a general direction at the cylinder. The refractive index and magnetic permeability of the host medium, as well as those for the core and coating of the cylinder, can be real or complex. The scattering and extinction efficiencies and the scattering amplitudes are derived for both the near field and the far field. As the medium is absorbing, the "true" extinction and scattering efficiencies are derived based on the radiative energy outflow at the surface of the cylinder. The radiative efficiencies in the far field are denoted as "apparent" properties because they include absorption by the intervening medium. The influence of the refractive index and permeability of the host medium on the scattering properties of a coated cylinder is illustrated by numerical examples.
本文给出了吸收介质中涂层无限长圆柱体的散射公式。圆柱体受到沿圆柱体一般方向传播的任意极化平面波的作用。主体介质以及圆柱体芯部和涂层的折射率和磁导率可以是实的或复的。推导了近场和远场的散射效率、消光效率以及散射振幅。由于介质是吸收性的，基于圆柱体表面的辐射能量流出推导出“真实”的消光和散射效率。远场中的辐射效率被表示为“表观”特性，因为它们包括中间介质的吸收。通过数值例子说明了主体介质的折射率和磁导率对涂层圆柱体散射特性的影响。
