Scattering Properties of Core-Shell Structure of Mist Wrapped Dust Particles

作者：Feng Shi-qi; Song Wei; Wang Yan; Miao Xin-hui; Xu Li-jun; Liu Yu; Li Cheng; Li Wen-long; Wang Yi-ran; Cai Hong-xing^*

来源：Spectroscopy and Spectral Analysis, 2014, 34(12): 3218-3223.

DOI：10.3964/j.issn.1000-0593(2014)12-3218-06

• Discrete dipole approximation method
• Core-shell structure
• Laser scattering property

The authors have investigated the optical properties of core-shell structure of mist wrapped dust particles based on the method of discrete dipole approximation (DDA). The influence on the thickness of the elliptical core-shell structure were calculated which the ratio of long axis and short axis is 2 1, and the change of scattering angle for scattering characteristics. The results shows that the thickness of outer layer increase from 1.2 to 4.8 mu m with the scattering and extinction coefficient of double core-shell layers particles decrease from 3.4 and 3.43 to 2.543 and 2.545, when the size of inner core isn't change. And scattering relative strength also increased obviously. The thickness of inner core increase from 0.6 to 2.4 mu m with the of scattering and extinction coefficient change from 2.59 and 2.88 to 2.6 and 2.76 when thickness of outer remain constant. Effect of the thickness of visible outer layer on the scattering characteristics of double core-shell layers particles is greater, because of the interaction between scattering light and outer materials. The scattering relative intensity decrease with wavelength increased, while increased with the scale of core-shell structure increase. The results make a promotion on the study of the transportation characteristics of laser and scattering characteristics when the atmospheric aerosol and water mist interact together.

• 出版日期2014-12
• 单位长春理工大学