掺杂对随机分布团簇粒子缪勒矩阵的影响

摘要

文章分析了不同含量的杂质对随机分布团簇粒子缪勒矩阵的影响.利用Bruggeman有效介质理论得到了含有不同体积份额杂质的硅酸盐粒子的等效复折射率.采用离散偶极子近似方法对包含有不同化学成分的随机分布团簇粒子的缪勒矩阵进行了数值计算,给出了各个缪勒矩阵元素的散射角分布曲线,探讨了不同含量的杂质对随机分布团簇粒子缪勒矩阵的影响.研究表明,掺杂对随机分布团簇粒子的缪勒矩阵存在着不同程度的影响,并且此影响随着粒子尺度参数的变化而显著变化.%The effects of impurity on the Mueller matrices of randomly distributed cluster agglomerates are analyzed.The equivalent complex refractive indees of silicate particle containing different volume fractions of amorphous carbon are obtained by the Bruggeman effective medium theory.Mueller-matrix elements of randomly distributed cluster agglomerates containing various chemical compositions are calculated by the discrete dipole approximation （DDA） method,and the profiles of Mueller-matrix elements are presented.The influence of the impurity on the Mueller matrices of randomly distributed cluster agglomerates is discussed.The results show that the influence of impurity on the Mueller matrices of randomly distributed cluster agglomerates is quite large,and it varies with the size parameters of the randomly distributed cluster agglomerates.