摘要
用Monte Carlo方法模拟了超短THz脉冲在随机散射介质中的传播 .根据Mie理论计算出随机散射介质的散射系数和各向异性因子 ,研究了随机散射颗粒及介质厚度的大小对透射脉冲的影响 .结果表明在Mie散射范围内 ,在相同的浓度下 ,颗粒尺寸越小 ,散射介质越厚 ,THz散射越严重 ,对透射脉冲的影响越大 .散射同时降低了THz脉冲在随机散射介质中的成像分辨率 .
Propagation of a femtosecond THz pulse in random scattering media is described using Monte-Carlo simulation. We study the effects of the radius of scattering spheres and the depth of scattering media, in relation to the parameters of scattering coefficient and anisotropic factor by Mie theory. The results show that when Mie theory holds, the smaller the spheres, the more the THz pulse is scattered. The scattering effect expands in the width of pulse in temporal domain and reduces the imaging resolution of THz pulse in random scattering media.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第11期2807-2810,共4页
Acta Physica Sinica
基金
中国科学院上海原子核研究所知识创新前沿领域资助的课题~~
