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Double-Sided Terahertz Imaging of Multilayered Glass Fiber-Reinforced Polymer

Przemyslaw Lopato
2017 Applied Sciences  
It is based on a double-sided measurement, acquired signal deconvolution, and data combining.  ...  It is based on picosecond electromagnetic pulses interacting with the evaluated structure. Differences of dielectric parameters enables detection of a particular layer in a layered material.  ...  Conflicts of Interest: The author declares no conflict of interest.  ... 
doi:10.3390/app7070661 fatcat:hfiunzagcnaybdui2ssh2srkpq

The Application of Microplasma in the Terahertz Field: A Review

Yue Guo, Shuqun Wu, Xuhui Liu, Lu Yang, Chaohai Zhang
2021 Applied Sciences  
Due to the small size and high plasma frequency of microplasma, the interaction between terahertz radiation and microplasma provides opportunities for developing functional terahertz devices based on microplasma  ...  This paper reviews the applications of microplasma in terahertz sources, terahertz amplifiers, terahertz filters, and terahertz detectors.  ...  N and M are the periods of the plasma layer and the dielectric defect layer, respectively.  ... 
doi:10.3390/app112411858 fatcat:jhfu2yrmbbeffemwobishtwmv4

Terahertz Inspection of Buildings and Architectural Art

Kirsti Krügener, Jan Ornik, Lorentz M. Schneider, Alexander Jäckel, Corinna L. Koch-Dandolo, Enrique Castro-Camus, Nicole Riedl-Siedow, Martin Koch, Wolfgang Viöl
2020 Applied Sciences  
As an example of the uses of terahertz in this field, we also include original results on a non-destructive assessment of a conservation intervention on murals of the Konstantinbasilika in Trier, Germany  ...  We present a broad literature review on the uses of terahertz radiation for the inspection architectural art, as well as building structures.  ...  Conflicts of Interest: The authors declare no conflict of interest.  ... 
doi:10.3390/app10155166 fatcat:cn74h4twbjcp3biw5q23cvmn2q

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Tao, Fitzgerald, Wallace
2020 Sensors  
In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors.  ...  A brief overview of the working principles of THz spectroscopy and imaging is provided, followed by a survey of selected applications from three industries—the building and construction industry, the energy  ...  In their experiments metal staples, sand, and air gap of 350 µm between the HDPE layers can be readily identified using THz-TDS transmission (see Figure 4 ).  ... 
doi:10.3390/s20030712 pmid:32012901 pmcid:PMC7039230 fatcat:ecss3eoxerdu7efmak7ihh2fiy

Terahertz Quality Inspection for Automotive and Aviation Industries

F. Ellrich, M. Bauer, N. Schreiner, A. Keil, T. Pfeiffer, J. Klier, S. Weber, J. Jonuscheit, F. Friederich, D. Molter
2019 Journal of Infrared, Millimeter and Terahertz Waves  
On the one hand, volumetric inspection of the materials to identify possible inclusions, cracks, or other defects is of high interest.  ...  Well-established methods based on eddy-current or photothermic principles often fail for composite substrates, whereas the substrate-independent terahertz technology for thickness measurements meets these  ...  The defect detection rate could be further improved by semi-automated defect detection via data conditioning and image processing as described in [14] .  ... 
doi:10.1007/s10762-019-00639-4 fatcat:yuzsdv46t5au3d4h5g4nznml6y

Terahertz time-gated spectral imaging for content extraction through layered structures

Albert Redo-Sanchez, Barmak Heshmat, Alireza Aghasi, Salman Naqvi, Mingjie Zhang, Justin Romberg, Ramesh Raskar
2016 Nature Communications  
contrast of the content on that specific layer.  ...  The method uses the statistics of the reflected terahertz electric field at subwavelength gaps to lock into each layer position and then uses a time-gated spectral kurtosis to tune to highest spectral  ...  Corporation, and Dr Harold Hwang and Professor Keith Nelson at Massachusetts Institute of Technology for support with experimentation.  ... 
doi:10.1038/ncomms12665 pmid:27610926 pmcid:PMC5023963 fatcat:f4wxoiljjvgjvkiwvpiuwuch6a

Influence of Terahertz Waves on Unidirectional Carbon Fibers in CFRP Composite Materials

Kwang-Hee IM, David Kuei HSU, Chien-Ping CHIOU, Daniel J. BARNARD, Sun-Kyu KIM, Sung-Jun KANG, Young-Tae CHO, Jong-An JUNG, In-Young YANG
2014 Medžiagotyra  
Terahertz time domain spectroscopy (THz TDS) system based on the reflective and through-transmission modes was utilized.  ...  Influence of terahertz waves (T-ray) on the fiber surface layups in the CFRP solid composites was studied.  ...  The technology of terahertz "T-ray" is comprising imaging, signal processing techniques and detecting techniques to analyze scanning images of defects in composites [7] .  ... 
doi:10.5755/ fatcat:gutwab5ffjdtzpregynmwtntn4


2019 2019 PhotonIcs & Electromagnetics Research Symposium - Spring (PIERS-Spring)  
Method Based on Detecting Signal to Clutter Ratio (SCR) in the Spectrum .. . . . 1876 On the Influence of Probe Positioning Errors due to Mechanical Uncertainties in Spherical Near-field Measurements  ...  Steel Reinforcing Bar Using Electromagnetic Method . . . . . . . . . . . . . . . . . . . . . . . . . 690 Magnetic Anomaly Detection of Defects in Underground Ferromagnetic Pipeline Using Variational  ... 
doi:10.1109/piers-spring46901.2019.9017748 fatcat:lmmr7cnm7nelbbz3f6arofik4q

Terahertz Optical Fibers

Md.Saiful Islam, Cristiano Cordeiro, Marcos Franco, Jakeya Sultana, Alice Cruz, Derek Abbott
2020 Optics Express  
Fiber characterization methods including different optics for terahertz time-domain spectroscopy (THz-TDS) setups are reviewed and application areas including short-distance data transmission, imaging,  ...  In this manuscript, we review the optimal materials, the guiding mechanisms, the fabrication methodologies, the characterization methods and the applications of such terahertz waveguides.  ...  Disclosures The authors declare that there are no conflicts of interest related to this article.  ... 
doi:10.1364/oe.389999 pmid:32549439 fatcat:q745yk6ckzgctogxhwyczqdqyu

Table of Contents

2021 2021 International Conference on Electrical Materials and Power Equipment (ICEMPE)  
of 10kV Cable Intermediate Joint Based on Ingress Defect P2-22 Transformer Defects Detection Method Based on Visible and Infrared Fusion Images P2-23 Two methods of simulating corona current pulses  ...  Joint O3-4 Insulation Delamination Detection of Three-Phase Composite Structure Based on Terahertz Time-Domain Spectral O3-5 A Modular Over-voltage Trigger Device for Twoelectrode Spark-gap Switches  ... 
doi:10.1109/icempe51623.2021.9509252 fatcat:yq2mrfvaerd7tatnb3aiuhc67e

Optically controlled characteristics of III–V Nitride based MM-wave transit-time devices

M. Mukherjee
2009 2009 Applied Electromagnetics Conference (AEMC)  
A double iterative computer method based on modified drift-diffusion model has been used to study their performance.  ...  thickness of a layer of paint, etc.  ...  Acknowledgement The authors wish to acknowledge Institute of Radio Physics & Electronics, University of Calcutta and the Centre of Millimeter wave Semiconductor Devices & Systems (CMSDS) for the support  ... 
doi:10.1109/aemc.2009.5430625 fatcat:63i3kj6yrbcgfeepe6ms5vmj5e

Industrial Applications of Terahertz Imaging [chapter]

J. Axel Zeitler, Yao-Chun Shen
2012 Terahertz Spectroscopy and Imaging  
In the second half of the chapter we discuss in more detail how terahertz imaging can be used to investigate the microstructure of pharmaceutical dosage forms.  ...  This chapter gives a concise overview of potential industrial applications for terahertz imaging that have been reported over the last decade with a discussion of the major advantages and limitations of  ...  Bee Yin Yeo for her help in putting together Section 18.3.3 of this chapter.  ... 
doi:10.1007/978-3-642-29564-5_18 fatcat:iv2zhbbiinc7bddtzoi5papqim

Subject Index 2020

2020 IEEE transactions on dielectrics and electrical insulation  
DOUBLE SHORT VACUUM GAPS IN SERIES: Double Short Vacuum Gaps in Series under Lightning Impulse Voltage: Estimation of Breakdown Voltage DOUBLE-LAYERED INSULATION CABLE: Space Charge Dynamics in Double-Layered  ...  Field Calculation and Optimization for Stress Cone of DC Cable Joint based on the Coaxial Double-Layer Insulation Model HVDC Surface Flashover in Compressed Air for Various Dielectrics Influence of Material  ... 
doi:10.1109/tdei.2020.9293253 fatcat:rsdsoetjnjfcpdwdhlmaukfy54

Optical coherence tomography for quality assessment of embedded microchannels in alumina ceramic

Rong Su, Mikhail Kirillin, Peter Ekberg, Arne Roos, Ekaterina Sergeeva, Lars Mattsson
2012 Optics Express  
based on refined diffusion approximation approach.  ...  Large-scale and cost-effective manufacturing of ceramic micro devices based on tape stacking requires the development of inspection systems to perform high-resolution in-process quality control of embedded  ...  Thus an air gap can be found which simulates delamination between the two layers.  ... 
doi:10.1364/oe.20.004603 pmid:22418218 fatcat:c6jju3ccdjdupfyzb6hlvhduzu

Terahertz-field-driven metastable topological phase in an atomically thin crystal [article]

Jiaojian Shi, Ya-Qing Bie, Wei Chen, Shiang Fang, Alfred Zong, Jinchi Han, Zhaolong Cao, Yong Zhang, Takashi Taniguchi, Kenji Watanabe, Vladimir Bulović, Efthimios Kaxiras (+3 others)
2022 arXiv   pre-print
Our results open up an avenue in the generation and detection of topological states that may not have a counterpart in thermodynamic equilibrium.  ...  Here, we achieve this goal by irradiating the atomically thin transition metal dichalcogenide MoTe_2 with tailored field-enhanced terahertz (THz) pulses.  ...  Figure 2B shows the optical image of a monolayer sample that we prepared using a dry transfer method (17) .  ... 
arXiv:1910.13609v2 fatcat:7c3do6efizbr7a4gxzpqbvm5r4
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