Continuous-wave terahertz multi-plane in-line digital holography

Huang, Haochong; Wang, Dayong; Li, Weihua; Rong, Lü; Taylor, Zachary D.; Deng, Qinghua; Li, Bin; Wang, Yunxin; Wu, Weidong; Panezai, Spozmai

doi:10.1016/j.optlaseng.2017.03.005

Cited by 37 publications

(15 citation statements)

References 44 publications

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“…By comparing the literature data, when heating CuSO 4 ·5H 2 O crystals, it will lose two water molecules at 60 °C firstly. And another two is at 100 °C, then the last one is at 260 °C 25 . In order to get trihydrate, monohydrate, and anhydrate, CuSO 4 ·5H 2 O powders were heated to 60, 100 and 260 °C by the muffle furnace successively, with heating rate of 10 °C/min, and kept for 30 min to complete the phase transition.…”

Section: Methodsmentioning

confidence: 99%

“…THz-TDS adopts the terahertz-wave detection with higher signal-to-noise ratio (SNR) locating in frequencies (0.1–10 THz) between the far infrared and microwave 22,23 . Terahertz wave is of lower energy 24,25 , and can be absorbed by the LFM of water molecules 26–29 . Moreover, water molecules’ dynamics driven by diverse types of thermally excited intermolecular motions are so strong that the network of hydrogen bonds (blue dashed lines in the enlarged part of Fig.…”

Section: Introductionmentioning

confidence: 99%

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Insights into the water status in hydrous minerals using terahertz time-domain spectroscopy

Huang

Hao

et al. 2019

Sci Rep

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The determinations of water status incorporated in hydrous minerals are of considerable significances in geoscience fields. Coincidentally, the aqueous sensitivity of terahertz radiation has motivated numerous explorations in several cross-domain applications. Terahertz time-domain spectroscopy is employed as a major probing technique coupling of traditional detecting methods to uncover the mask of water status in copper sulfate pentahydrate as well as mineral quartz in this article. Based on the quantitative identification of water status in copper sulfate pentahydrate, the water incorporated in mineral quartz is verified qualitatively. Notable differences of optical constants originating from the water content are obtained for copper sulfate pentahydrate and mineral quartz. These present works indicate that terahertz technology can be considered as a promising method to satisfy the ever-increasing requirements in hydrous mineral analyses.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Insights into the water status in hydrous minerals using terahertz time-domain spectroscopy

Huang

Hao

et al. 2019

Sci Rep

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“…However, it is rather slow with regard to the acquisition time and requires rather large tissue samples. In contrast, THz digital holography can acquire multi-plane information of a target in the THz range in a shorter amount of time, with improved structural details [109,110]. It can contribute to the early diagnosis of hepatocellular carcinoma by identifying the variations in water content and the presence of fibrosis in the liver [111].…”

Section: Applications Of Thz Imaging and Thz Spectroscopy In Digesmentioning

confidence: 99%

Terahertz Spectroscopy and Imaging: A Cutting-Edge Method for Diagnosing Digestive Cancers

et al. 2019

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The Terahertz’s wavelength is located between the microwave and the infrared region of the electromagnetic spectrum. Because it is non-ionizing and non-invasive, Terahertz (THz)-based detection represents a very attractive tool for repeated assessments, patient monitoring, and follow-up. Cancer acts as the second leading cause of death in many regions, and current predictions estimate a continuous increasing trend. Of all types of tumors, digestive cancers represent an important percentage and their incidence is expected to increase more rapidly than other tumor types due to unhealthy lifestyle habits. Because it can precisely differentiate between different types of molecules, depending on water content, the information obtained through THz-based scanning could have several uses in the management of cancer patients and, more importantly, in the early detection of different solid tumors. The purpose of this manuscript is to offer a comprehensive overview of current data available on THz-based detection for digestive cancers. It summarizes the characteristics of THz waves and their interaction with tissues and subsequently presents available THz-based technologies (THz spectroscopy, THz-tomography, and THZ-endoscope) and their potential for future clinical use. The third part of the review is focused on highlighting current in vitro and in vivo research progress in the field, for identifying specific digestive cancers known as oral, esophageal, gastric, colonic, hepatic, and pancreatic tumors.

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“…Chen et al developed a denoising method for THz in-line digital holographic reconstructions, based on a Markov chain Monte Carlo sampling [151]. Different auto-focusing algorithms and corrections were investigated by Huang et al [125,127] and applied to reconstruct a pair of objects at different distances from the detector [121].…”

Section: In-line Digital Holographymentioning

confidence: 99%

THz coherent lensless imaging

et al. 2019

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Imaging with THz radiation has proved an important tool for both fundamental science and industrial use. Here we review a class of THz imaging implementations, named coherent lensless imaging, that reconstruct the coherent response of arbitrary samples with a minimized experimental setup based only on a coherent source and a camera. After discussing the appropriate sources and detectors to perform them, we detail the fundamental principles and implementations of THz digital holography and phase retrieval. These techniques owe a lot to imaging with different wavelengths, yet innovative concepts are also being developed in the THz range and are ready to be applied in other spectral ranges. This makes our review useful for both the THz and imaging communities, and we hope it will foster their interaction.

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Continuous-wave terahertz multi-plane in-line digital holography

Cited by 37 publications

References 44 publications

Insights into the water status in hydrous minerals using terahertz time-domain spectroscopy

Insights into the water status in hydrous minerals using terahertz time-domain spectroscopy

Terahertz Spectroscopy and Imaging: A Cutting-Edge Method for Diagnosing Digestive Cancers

THz coherent lensless imaging

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