Terahertz phase imaging and biomedical applications

Wan, Min; Healy, John J.; Sheridan, John T.

doi:10.1016/j.optlastec.2019.105859

Cited by 85 publications

(31 citation statements)

References 116 publications

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“…In this review the laser driven generation/detection methodologies and applications based on the mid-band THz radiation are not covered. The interested readers can find a detailed review on the metrology techniques in [19,21] and on the broad mid-band applications in [1,[22][23][24][25].…”

Section: Conventional Terahertz Sourcesmentioning

confidence: 99%

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

et al. 2022

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Free-Electron Lasers are a rapidly growing field for advanced science and applications, and worldwide facilities for intense field generation, characterization and usage are becoming increasingly popular due to their peculiarities, including extremely bright, coherent, wide band tunable ultra-short pulses which are not achievable with other techniques up to now. In this review we give a thorough survey of the latest advances in the Free-Electron Laser-based field generation and detection methodologies and then present the main characteristics of a future THz/IR source, named TerRa@BriXSinO, based on a superconducting linear accelerator. The foreseen source is strongly monochromatic, with a bandwidth of 1% or smaller, highly coherent both transversally and longitudinally, with extreme versatility and high frequency tunability. After introducing the most recent and novel FEL-assisted scientific investigations, including fundamental explorations into complex systems and time-dependent interactions and material dynamics, we present our vision on the potential use of the TerRa facility and analyze some possible applications, ranging from non-linear physics under extreme conditions to polarization sensitive imaging and metamaterial-based sensing.

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Section: Conventional Terahertz Sourcesmentioning

confidence: 99%

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

et al. 2022

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“…In recent years, THz QCL performance has been continuously improved, making it the first choice for use in real-time THz imaging systems [46][47][48]. Continuous THz imaging is another common THz spectral imaging technique that eliminates the need to use a pulsed fs laser for THz spectral imaging [49][50][51]. Since Kleine-Ostmann et al first proposed continuous-wave THz spectral imaging in 2001, CW imaging has developed rapidly and is widely used as it provides high spectral resolution.…”

Section: Principlementioning

confidence: 99%

Applications of THz Spectral Imaging in the Detection of Agricultural Products

et al. 2021

Photonics

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Agricultural products need to be inspected for quality and safety, and the issue of safety of agricultural products caused by quality is frequently investigated. Safety testing should be carried out before agricultural products are consumed. The existing technologies for inspecting agricultural products are time-consuming and require complex operation, and there is motivation to develop a rapid, safe, and non-destructive inspection technology. In recent years, with the continuous progress of THz technology, THz spectral imaging, with the advantages of its unique characteristics, such as low energies, superior spatial resolution, and high sensitivity to water, has been recognized as an efficient and feasible identification tool, which has been widely used for the qualitative and quantitative analyses of agricultural production. In this paper, the current main performance achievements of the use of THz images are presented. In addition, recent advances in the application of THz spectral imaging technology for inspection of agricultural products are reviewed, including internal component detection, seed classification, pesticide residues detection, and foreign body and packaging inspection. Furthermore, machine learning methods applied in THz spectral imaging are discussed. Finally, the existing problems of THz spectral imaging technology are analyzed, and future research directions for THz spectral imaging technology are proposed. Recent rapid development of THz spectral imaging has demonstrated the advantages of THz radiation and its potential application in agricultural products. The rapid development of THz spectroscopic imaging combined with deep learning can be expected to have great potential for widespread application in the fields of agriculture and food engineering.

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“…The first gives a general indication of the losses; the second one is related to the refractive index. Fixing the frequency, one can visualize the object in the frequency domain, the amplitude and the phase images [134]. This offers more contrast, because of the sufficiently different refractive indexes of the materials than the losses, which provide a meaningful contrast.…”

Section: Basics Of Thz Imagingmentioning

confidence: 99%

THz Pulsed Imaging in Biomedical Applications

et al. 2020

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Recent advances in technology have allowed the production and the coherent detection of sub-ps pulses of terahertz (THz) radiation. Therefore, the potentialities of this technique have been readily recognized for THz spectroscopy and imaging in biomedicine. In particular, THz pulsed imaging (TPI) has rapidly increased its applications in the last decade. In this paper, we present a short review of TPI, discussing its basic principles and performances, and its state-of-the-art applications on biomedical systems.

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Terahertz phase imaging and biomedical applications

Cited by 85 publications

References 116 publications

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

Multi-Pass Free Electron Laser Assisted Spectral and Imaging Applications in the Terahertz/Far-IR Range Using the Future Superconducting Electron Source BriXSinO

Applications of THz Spectral Imaging in the Detection of Agricultural Products

THz Pulsed Imaging in Biomedical Applications

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