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

Volume

51

Issue

1

fYear

2015

fDate

1 8 2015

Firstpage

85

Lastpage

86

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;

fLanguage

English

Journal_Title

Electronics Letters

Publisher

iet

ISSN

0013-5194

Type

jour

DOI

10.1049/el.2014.3873

Filename

7006849