对流层太赫兹波散射特性研究  

Study on the characteristics of THz wave scattering in the troposphere

作　　者：张成义[1] 魏邦海 郑改革[1] 张晋源[1] 熊玉宝[1] 

机构地区：[1]南京信息工程大学物理与光电工程学院,江苏南京210044

出　　处：《激光与红外》2015年第2期204-208,共5页Laser & Infrared

基　　金：国家自然科学基金项目(No.61203211)资助

摘　　要：基于Mie散射理论分析了球形近似下对流层气溶胶粒子对太赫兹波段的散射特性。通过模拟对比,得出对流层四种粒子在太赫兹波段的散射能力。研究发现,粒子的尺度参数对散射强度的影响比较明显,随着粒子尺度参数的增大,散射相位函数振荡越强,散射强度逐渐变大;散射光逐渐前向集中于更小的角度;曲线越来越尖锐,且出现了更多分叶。仿真给出了波长对散射参数的影响。本文利用Matlab给出了四种粒子太赫兹波段的散射仿真,研究结果对太赫兹技术在气象相关领域的应用具有一定的参考价值。The scattering characteristics of near- spherical troposphere aerosol particle in terahertz wave band are analyzed based on Mie scattering theory. By simulation and comparison,the scattering abilities of four kinds of troposphere particles in terahertz wave band are obtained. Results show that the influence of scale parameter of particle on scattering intensity is obvious. As the scale parameter of particle increases,the oscillation of scattering phase function becomes stronger and the scattering intensity gradually becomes bigger. Scattering light gradually focuses on the smaller angle ahead. The curves become sharper and appear more divided leaves. The simulation shows that the wavelengths affect scattering parameters. The research of terahertz scattering simulation can provide references for the application of terahertz technology in the meteorological and related fields.

关 键 词：散射 气溶胶粒子 太赫兹 尺度参数 

分 类 号：O441[理学—电磁学]