复杂烟尘凝聚粒子的光散射特性研究  

A Study of Light Scattering Properties of Complex Soot Aggregates

作　　者：类成新[1] 吴振森[2] 冯东太[1] 

机构地区：[1]山东理工大学理学院,山东淄博255049 [2]西安电子科技大学理学院,陕西西安710071

出　　处：《激光与光电子学进展》2011年第10期163-167,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(60771038)资助课题

摘　　要：利用离散偶极子近似方法对粘附不同粒径、不同化学成分大粒子的复杂凝聚粒子的光散射特性进行了研究,数值计算了复杂凝聚粒子的散射强度和线偏振度随散射角的分布规律,分析了大粒子的粒径、化学成分对整个凝聚粒子光散射特性的影响。研究表明,凝聚粒子中大粒子的粒径和化学成分对整个凝聚粒子的光散射特性影响较大,此影响随着大粒子粒径的增大变得更加明显。The discrete dipole approximation （DDA） method is used to study the light scattering properties of a soot cluster which adheres to a large particle with different sizes and material composition. The numerical results of the scattering intensity and the degree of linear polarization for a wide variety of complex soot aggregates in random orientation are illustrated, and the effects of the material composition and the size of the large particle on light scattering properties of complex soot aggregates are analyzed. It is shown that the material composition and the size of the large particle can strongly influence or even dominate the overall light scattering properties of the aggregates.

关 键 词：物理光学 光散射特性 离散偶极子近似方法 烟尘凝聚粒子 

分 类 号：O436[机械工程—光学工程]