Absorption-sensitive diffuse reflection imaging of concealed powders using a terahertz quantum cascade laser.
Absorption-sensitive diffuse reflection imaging of concealed powders using a terahertz quantum cascade laser.
复制标题
使用太赫兹量子级联激光器对隐藏粉末进行吸收敏感漫反射成像。
作者：
P. Dean;M. U. Shaukat;S. Khanna;S. Chakraborty;M. Lachab;A. Burnett;G. Davies;E. Linfield
我们报告了使用太赫兹量子级联激光器在空气中对隐藏粉末样品进行漫反射成像。使用完全表征的聚苯乙烯和聚甲基丙烯酸甲酯 (PMMA) 粉末混合物证实了检测方案对样品内次表面吸收的灵敏度。然后将这些样品的反向散射强度测量结果与 Kubelka-Munk 散射理论以及基于准晶体近似的几个模型结合使用，以提取 PMMA 的吸收系数。我们的研究证明了高分辨率频域太赫兹成像用于检测和识别反射几何中隐藏粉末的可行性。
We report diffuse reflection imaging in air of concealed powdered samples using a terahertz quantum cascade laser. The sensitivity of the detection scheme to sub-surface absorption within samples is confirmed using fully-characterized powdered admixtures of polystyrene and polymethyl methacrylate (PMMA). Measurements of the backscattering intensity from these samples are then used in conjunction with Kubelka-Munk scattering theory, as well as several models based on the quasi-crystalline approximation, to extract the absorption coefficient of PMMA. Our research demonstrates the feasibility of high-resolution frequency-domain terahertz imaging for the detection and identification of concealed powders in a reflection geometry.
影响因子：
3.8
作者：
Belkin, Mikhail A.;Fan, Jonathan A.;Linfield, Edmund H.
通讯作者：
Linfield, Edmund H.