| 光谱学与光谱分析 |
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| Scattering Properties of Core-Shell Structure of Mist Wrapped Dust Particles |
| FENG Shi-qi1, SONG Wei1, WANG Yan2, MIAO Xin-hui1, XU Li-jun1, LIU Yu1, LI Cheng1, LI Wen-long1, WANG Yi-ran1, CAI Hong-xing1* |
1. Changchun University of Science and Technology, Changchun 130022, China
2. Northwest Institute of Mechanical & Electronical Engineering, Xianyang 712099, China |
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Abstract 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 μm 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 μm 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.
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Received: 2013-12-12
Accepted: 2014-03-25
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Corresponding Authors:
CAI Hong-xing
E-mail: ciomsz@126.com
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