随机取向纳米石墨椭球粒子的红外消光特性

利用离散偶极子近似(DDA)方法研究了椭球形的纳米石墨粒子的红外消光特性。计算了不同形状的椭球粒子红外消光截面随波长变化规律,并与等效球形粒子的消光性能进行了比较,分析了不同入射波长时,椭球粒子形状和粒径对消光的影响。结果表明,椭球状的纳米石墨粒子红外消光性能好于等效球粒子的消光性能,椭球粒子的最佳消光等效粒径与轴长比和入射波长有关。

Infrared Extinction Properties of Randomly Oriented Nano-graphite Ellipsoid Particles

In this paper,the infrared extinction properties of nano-graphite ellipsoid particles have been calculated based on the discrete dipole approximation method(DDA).We have obtained the dependence of infrared extinction cross-sections on the wavelengths and compared the extinction properties with those of the equivalent spherical particles.The effects of the shape and effective radius of ellipsoid particles on the infrared extinction are discussed.The theoretical results indicate that infrared extinction properties of nano-graphite ellipsoid particles are better than those of equivalent spherical particles.The optimal effective radius of ellipsoid particles is related with the shape of particles and the incident wavelength.