Three‐dimensional imaging with terahertz quantum cascade laser and quantum well photodetector | Zendy

Zhou Tao | Zendy; Tan Zhi Yong | Zendy; Gu Li | Zendy; Fu Zhang Long | Zendy; Yao Zheng Wei | Zendy; Cao Jun Cheng | Zendy

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Three‐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 , quantum cascade laser , cascade , optoelectronics , laser , optics , physics , quantum , photomixing , quantum well , far infrared laser , terahertz metamaterials , terahertz spectroscopy and technology , materials science , quantum mechanics , engineering , 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.

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