Terahertz Imaging Based on Coherent Detection of the Fourier-Space Spectrum

Hui Yuan, Daniel Vos, Min Wan, A. Lisauskas, Hartmut G. Roskos, John T. Sheridan

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

A novel continuous-wave THz imaging system based on the coherent recording of the Fourier space spectrum (FSS) with heterodyne detection is described. The system consists of two 300-GHz electrical multiplier-chain sources with a slight frequency offset, and a single narrow-band TeraFET detector working in raster-scanning mode. The complex-valued FSS is recorded in either the focal-plane or in the free space of the optical system in focusing and non-focusing mode, respectively. Two- and three-dimensional (2D and 3D) images are reconstructed numerically with an inverse Fourier transform algorithm. With a 80 × 80-mm2 detection area and 1-mm2 sampling steps, 1-mm resolution and 76.2×76.2-mm2 image area are achieved.
Original languageEnglish
Title of host publication2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019
PublisherInstitute of Electrical and Electronics Engineers
Number of pages2
ISBN (Electronic)978-1-5386-8285-2
DOIs
Publication statusPublished - 21 Oct 2019
Externally publishedYes
Event2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019 - Paris, France
Duration: 1 Sept 20196 Sept 2019

Conference

Conference2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2019
Abbreviated titleIRMMW-THz 2019
Country/TerritoryFrance
CityParis
Period1/09/196/09/19

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