Terahertz Three-Dimensional Imaging Based on Computed Tomography with Photonics-Based Noise Source
Tao Zhou, Rong Zhang, Chen Yao, Zhang-Long Fu, Di-Xiang Shao, Jun-Cheng Cao**
Key Laboratory of Terahertz Solid-State Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050
Abstract：Computed tomography has been proven to be useful for non-destructive inspection of structures and materials. We build a three-dimensional imaging system with the photonically generated incoherent noise source and the Schottky barrier diode detector in the terahertz frequency band (90–140 GHz). Based on the computed tomography technique, the three-dimensional image of a ceramic sample is reconstructed successfully by stacking the slices at different heights. The imaging results not only indicate the ability of terahertz wave in the non-invasive sensing and non-destructive inspection applications, but also prove the effectiveness and superiority of the uni-traveling-carrier photodiode as a terahertz source in the imaging applications.
Nguyen K L, Johns M L, Gladden L F, Worrall C H, Alexander P, Beere H E, Pepper M, Ritchie D A, Alton J, Barbieri S and Linfield E H 2006 Opt. Express14 2123
2017, Vol. 34 
