单粒子与复合粒子散射强度的计算与分析

根据Mie散射理论,对金属单粒子和复合粒子的散射强度和偏振度进行了数值计算与理论分析,得到了两类散射体的散射强度、偏振度与散射角、入射波长及壳层厚度之间的关系。结果表明,随着入射波长的增大,复合粒子的前向散射增强,背向散射未变化;偏振度峰值和峰位易出现明显的退偏振现象,明显区别于金属单粒子散射行为。该结论对两类金属材料光学特性方面的开发和应用提供了理论参考。

Calculation and Analysis on the Scattering Intensity of Single and Composite Particle

Based on the Mie scattering theory,the light scattering intensity and polarization of single and composite mental particle were numerically calculated and theoretically analyzed.It was also obtained the relationships between scattering intensity,polarization and scattering angle,incident wavelength and the size of the shell of the two kinds of particles.The research results show that with the increase of incident wavelength,the forward scattering intensity rises,the backward keeps invariant,obvious depolarization phenomenon appears at the peak value and position of polarization.This scattering action is different from the one that of the single mental particle.This result can provide theoretical reference to the development and application of the two kinds of particles at the aspect of optical characteristics.