Open AccessThree‐dimensional imaging with terahertz quantum cascade laser and quantum well photodetector
Author(s) -
Zhou Tao,
Tan Zhi Yong,
Gu Li,
Fu Zhang Long,
Yao Zheng Wei,
Cao Jun Cheng
Publication year - 2015
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.3873
Subject(s) - terahertz radiation , photodetector , cascade , quantum cascade laser , optics , stacking , laser , optoelectronics , quantum , quantum efficiency , iterative reconstruction , physics , tomography , materials science , computer science , computer vision , engineering , nuclear magnetic resonance , quantum mechanics , chemical engineering
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.