Title :
Three-dimensional imaging with terahertz quantum cascade laser and quantum well photodetector
Author :
Tao Zhou ; Zhi Yong Tan ; Li Gu ; Zhang Long Fu ; Zheng Wei Yao ; Jun Cheng Cao
Author_Institution :
Key Lab. of Terahertz Solid-State Technol., Shanghai Inst. of Microsyst. & Inf. Technol., Shanghai, China
Abstract :
A three-dimensional (3D) terahertz (THz) computed tomography system with a THz quantum cascade laser as the source and a quantum well photodetector as the receiver is demonstrated. By utilising the algebraic reconstruction technique for image reconstruction, both the external and internal structures of the cross-section are revealed. The iterative algorithm not only reduces the projections, but also provides good suppression of the beam hardening effect. Finally, the 3D image is built by stacking the images at different heights.
Keywords :
computerised tomography; image reconstruction; iterative methods; photodetectors; quantum cascade lasers; quantum well devices; terahertz wave imaging; algebraic reconstruction technique; beam hardening effect; image reconstruction; iterative algorithm; quantum well photodetector; receiver; terahertz quantum cascade laser; three-dimensional imaging; three-dimensional terahertz computed tomography system;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.3873
