Parviainen Hannu, Lumme Kari
Observatory, Tähtitorninmäki, 00014 University of Helsinki, Finland.
J Opt Soc Am A Opt Image Sci Vis. 2008 Jan;25(1):90-7. doi: 10.1364/josaa.25.000090.
We investigate the wave-optical light scattering properties of deformed thin circular films of constant thickness using the discrete-dipole approximation. Effects on the intensity distribution of the scattered light due to different statistical roughness models, model dependent roughness parameters, and uncorrelated, random, small-scale porosity of the inhomogeneous medium are studied. The suitability of the discrete-dipole approximation for rough-surface scattering problems is evaluated by considering thin films as computationally feasible rough-surface analogs. The effects due to small-scale inhomogeneity of the scattering medium are compared with the analytic approximation by Maxwell Garnett, and the results are found to agree with the approximation.
我们使用离散偶极子近似研究了厚度恒定的变形薄圆形薄膜的波动光学光散射特性。研究了不同统计粗糙度模型、与模型相关的粗糙度参数以及非均匀介质中不相关、随机、小尺度孔隙率对散射光强度分布的影响。通过将薄膜视为计算上可行的粗糙表面类似物，评估了离散偶极子近似对粗糙表面散射问题的适用性。将散射介质小尺度不均匀性的影响与麦克斯韦·加内特的解析近似进行了比较，结果发现与该近似相符。
