Scattering and propagation of terahertz pulses in random soot aggregate systems

• Published in: Chinese physics B Vol. 23; no. 5; pp. 277 - 282
• Main Author: 李海英 吴振森 白璐 李正军
• Format: Journal Article
• Language: English
• Published: 01.05.2014
• Subjects: Agglomeration; Aggregates; Cross sections; Mathematical analysis; Mathematical models; Pulse propagation; Scattering; Soot; 传播理论; 太赫兹脉冲; 散射特性; 有限扩散凝聚; 烟尘; 聚集系统; 随机介质; 集合体
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/23/5/054201

Scattering and propagation of terahertz pulses in random soot aggregate systems are studied by using the generalized multi-particle Mie-solution （GMM） and the pulse propagation theory. Soot aggregates are obtained by the diffusion-limited aggregation （DLA） model. For a soot aggregate in soot aggregate systems, scattering characteristics are analyzed by using the GMM. Scattering intensities versus scattering angles are given. The effects of different positions of the aggregate on the scattering intensities, scattering cross sections, extinction cross sections, and absorption cross sections are computed and compared. Based on pulse propagation in random media, the transmission of terahertz pulses in random soot aggregate systems is determined by the two-frequency mutual coherence function. Numerical simulations and analysis are given for terahertz pulses （0.7956 THz）.