Journal
APPLIED SPECTROSCOPY REVIEWS
Volume 57, Issue 3, Pages 249-264Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/05704928.2021.1875480
Keywords
THz-TDS; fast imaging component; tomography imaging; near-field imaging
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Funding
- National Natural Science Foundation of China [31971779]
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Due to the unique characteristics of terahertz (THz) waves, such as low-energy, penetrating, and broadband, THz imaging has been regarded as cutting-edge technology in many fields. High-performance THz imaging systems are becoming indispensable as technology demand grows. The ability of THz time-domain spectroscopy (THz-TDS) system to extract spectra from amplitude and phase information opens virtually unlimited possibilities for imaging applications. Researchers are focusing on fast imaging components and the latest developments of THz-TDS-based imaging methods to improve performance further.
Due to the unique characteristics of terahertz (THz) waves, such as low-energy, penetrating, and broadband, THz imaging has been regarded as cutting-edge technology in many fields. As the demand for technology grows, high-performance THz imaging systems are becoming indispensable. The ability of THz time-domain spectroscopy (THz-TDS) system to extract spectra from amplitude and phase information opens virtually unlimited possibilities for imaging applications. In this review, the main performance achievements of THz-TDS imaging were displayed. The researches on fast imaging components for solving the existing deficiency of imaging speed of THz-TDS were summarized. Besides, the latest developments of several THz-TDS-based imaging methods, including tomography imaging and near-field imaging were highlighted, and an outlook on the performance improvement was presented.
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