Article
Multidisciplinary Sciences
Nicolas Couture, Wei Cui, Markus Lippl, Rachel Ostic, Defi Junior Jubgang Fandio, Eeswar Kumar Yalavarthi, Aswin Vishnuradhan, Angela Gamouras, Nicolas Y. Joly, Jean-Michel Menard
Summary: Slow motion movies can be used to monitor low-energy resonances and reveal fast structural or chemical transitions by replacing images with terahertz waves. By combining THz spectroscopy with a real-time monitoring technique, we have demonstrated the ability to resolve non-reproducible phenomena at 50k frames per second. Our experimental configuration using the photonic time-stretch technique allows for unprecedented data acquisition speeds and enables the study of fast irreversible processes at THz frequencies.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Junliang Dong, Ana Ribeiro, Aurelien Vacheret, Alexandre Locquet, D. S. Citrin
Summary: This study utilizes nondestructive terahertz multispectral imaging to observe the corrosion layer on a lead funerary cross, successfully restoring and enhancing obscured inscriptions. The approach brings together the properties of terahertz radiation and advanced signal processing techniques, providing new perspectives and methods for archaeological studies.
SCIENTIFIC REPORTS
(2022)
Article
Optics
Thomas Gretzinger, Krunal Radhanpura, Philip Fairman, Mark Berman, David Farrant
Summary: Terahertz radiation combines spectroscopy and imaging to reveal concealed objects and identify materials. A compact fiber-coupled hyperspectral imaging reflection system is developed for security and industrial applications. The system can measure objects up to 150 mm in diameter with a depth range of up to 255 mm, allowing for 3-dimensional mapping and simultaneous acquisition of spectral data. Spectral information between 0.2-1.8 THz is extracted from a hyperspectral image to identify specific materials in different humidity environments.
Article
Physics, Applied
Takeshi Yasui, Emmanuel Abraham
Summary: Pulsed terahertz electric fields enable various coherent imaging modes, and 2D-ST THz imaging is a promising means for real-time imaging of moving objects. It allows acquisition of temporal waveform and line image simultaneously, boosting the imaging rates applicable to moving objects.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Analytical
Hungyen Lin, Benjamin P. Russell, Prince Bawuah, J. Axel Zeitler
Summary: This study demonstrates the sensitivity of terahertz technology in measuring water absorption, comparing it to conventional gravimetric analysis to investigate the variation of water content in simple and commercial epoxy systems.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Bjorn Hubschmann Molvig, Thorsten Baek, Jie Ji, Peter Boggild, Simon Jappe Lange, Peter Uhd Jepsen
Summary: We present a novel integrated THz system for spectroscopy in the 0.1-1.4 THz range. The system utilizes photomixing antenna for THz generation and photoconductive antenna for THz detection. We compare the performance of our system with a femtosecond-based THz time-domain spectroscopy system for mapping and imaging of large-area graphene.
Article
Optics
Qinggang Lin, Xinming Yuan, Xuanke Zeng, Yatao Yang, Yi Cai, Xiaowei Lu, Maijie Zheng, Congying Wang, Wenhua Cao, Shixiang Xu
Summary: This paper presents a novel design for single-shot terahertz polarization detection based on terahertz time-domain spectroscopy. Its validity has been confirmed by comparing its detection results with those of the THz common-path spectral interferometer, and the results show that its signal-to-noise ratios are superior to those of the 45 degrees optical bias THz-TDS. The setup works without the need for optical scan and is suitable for applications with poor or no repeatability.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Analytical
Atsushi Nakanishi, Koichiro Akiyama, Shohei Hayashi, Hiroshi Satozono, Kazuue Fujita
Summary: Using a compact ultra-broadband terahertz semiconductor source, spectral imaging of pharmaceutical material was demonstrated. The method allows distinguishing crystal forms of pharmaceutical materials.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Analytical
Yeeun Roh, Sang-Hun Lee, Jisung Kwak, Hyun Seok Song, Seulgi Shin, Yun Kyung Kim, Jeong Weon Wu, Byeong-Kwon Ju, Boyoung Kang, Minah Seo
Summary: This report introduces a highly improved THz imaging technology by comparing complementary metamaterials based on Babinet's principle, showing significant potential applications in producing clear contrast images in biological samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Optics
Laleh Mohtashemi, Paul Westlund, Derek G. Sahota, Graham B. Lea, Ian Bushfield, Payam Mousavi, J. Steven Dodge
Summary: The presented maximum-likelihood method offers superior parameter estimation in terahertz time-domain spectroscopy and provides a reliable measure of the goodness of fit. Additionally, a simple noise model parameterized by three dominant sources is developed, offering an effective means of estimating materials characteristics.
Article
Chemistry, Multidisciplinary
Daniel Molter, Daniel Huebsch, Thorsten Sprenger, Korbinian Hens, Konstantinos Nalpantidis, Frank Platte, Garik Torosyan, Rene Beigang, Joachim Jonuscheit, Georg von Freymann, Frank Ellrich
Summary: Terahertz time-domain spectroscopy is utilized for spectral investigation of materials covered by visibly opaque objects, making it ideal for inspecting mail content. Research on mail inspection in this spectral range includes machine design, optical layouts, data analysis, and implementation.
APPLIED SCIENCES-BASEL
(2021)
Article
Optics
Yannick Abautret, Dominique Coquillat, Michel Lequime, Myriam Zerrad, Claude Amra
Summary: In this study, reverse engineering techniques and terahertz time-domain spectroscopy were applied to analyze the dehydration process of a sunflower leaf. The multilayer structure of the leaf was accurately extracted, and the time variations of thickness and complex index were emphasized.
Article
Physics, Multidisciplinary
Feng Long-Cheng, Du Chen, Yang Sheng-Xin, Zhang Cai-Hong, Wu Jing-Bo, Fan Ke-Bin, Jin Biao-Bing, Chen Jian, Wu Pei-Heng
Summary: In this paper, a real-time near-field high-resolution THz spectral imaging system is designed and built. The system can switch between large beam THz imaging and tight-focusing THz imaging. The performance of the system is analyzed by measuring and studying micromachining samples, showing its superiority in spatial resolution and imaging speed.
ACTA PHYSICA SINICA
(2022)
Article
Materials Science, Characterization & Testing
B. Nidheesh Kumar, Sachinlal Aroliveetil, M. C. Santhosh Kumar, M. Nallaperumal, S. Thiruppathirajan, K. P. Sruthi Krishna, Krishnan Balasubramanian, K. K. Moideenkutty, L. Mohan Kumar
Summary: In this study, Terahertz imaging in reflection mode is used to detect debonds and inclusions in the thermal protection system of launch vehicles. Terahertz time-domain spectroscopy imaging system can distinguish between healthy and defective areas. Through Terahertz time-domain spectroscopy in transmission mode, the refractive index and absorption coefficient of individual layers are obtained, which is necessary for thickness measurement. Thickness estimation of multi-layer thermal protection systems is achieved using the time-of-flight principle and the Sparse deconvolution technique.
NONDESTRUCTIVE TESTING AND EVALUATION
(2023)
Article
Chemistry, Multidisciplinary
Alex M. Potts, Abhay K. Nayak, Michael Nagel, Kelson Kaj, Biljana Stamenic, Demis D. John, Richard D. Averitt, Andrea F. Young
Summary: Free-space time domain THz spectroscopy is suitable for studying electrodynamic responses in condensed matter systems. However, it becomes challenging for samples smaller than the diffraction limit. In this study, we propose an on-chip THz spectrometer with a bandwidth of 200 to 750 GHz. By using this spectrometer, we are able to measure the optical conductivity of a narrow NbN film and observe spectroscopic signatures of the superconducting gap.
Article
Engineering, Electrical & Electronic
John W. Bowen, Tom Owen, J. Bianca Jackson, Gillian C. Walker, John F. Roberts, Dominique Martos-Levif, Pauline Lascourreges, David Giovannacci, Vincent Detalle
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2015)
Article
Optics
Anton S. Skryl, J. Bianca Jackson, Michael I. Bakunov, Michel Menu, Gerard A. Mourou
Article
Materials Science, Multidisciplinary
Julien Labaune, J. Bianca Jackson, Kaori Fukunaga, Jeffrey White, Laura d'Alessandro, Alison Whyte, Michel Menu, Gerard Mourou
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2011)
Article
Engineering, Multidisciplinary
J. B. Jackson, M. Mourou, J. Labaune, J. F. Whitaker, I. N. Duling, S. L. Williamson, C. Lavier, M. Menu, G. A. Mourou
MEASUREMENT SCIENCE AND TECHNOLOGY
(2009)
Article
Optics
J. B. Jackson, M. Mourou, J. F. Whitaker, I. N. Duling, S. L. Williamson, M. Menu, G. A. Mourou
OPTICS COMMUNICATIONS
(2008)
Article
Optics
Gillian C. Walker, John W. Bowen, Julien Labaune, J-Bianca Jackson, Sillas Hadjiloucas, John Roberts, Gerard Mourou, Michel Menu
Article
Optics
Gillian C. Walker, John W. Bowen, Wendy Matthews, Soumali Roychowdhury, Julien Labaune, Gerard Mourou, Michel Menu, Ian Hodder, J. Bianca Jackson
Article
Engineering, Electrical & Electronic
J. Bianca Jackson, John Bowen, Gillian Walker, Julien Labaune, Gerard Mourou, Michel Menu, Kaori Fukunaga
IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY
(2011)
Proceedings Paper
Multidisciplinary Sciences
J. Bianca Jackson, Marcello Melis, Gillian Walker, David Giovanacci, Matteo Miccoli, Dominique Martos-Levif, John Bowen, Vincent Detalle
OPTICS FOR ARTS, ARCHITECTURE, AND ARCHAEOLOGY V
(2015)
Proceedings Paper
Multidisciplinary Sciences
D. Giovannacci, V. Detalle, D. Martos-Levif, J. Ogien, E. Bernikola, V. Tornari, K. Hatzigiannakis, K. Mouhoubi, J. -L. Bodnar, G. -C. Walker, D. Brissaud, B. Trichereau, B. Jackson, J. Bowen
OPTICS FOR ARTS, ARCHITECTURE, AND ARCHAEOLOGY V
(2015)
Article
Engineering, Electrical & Electronic
J. Bianca Jackson, Julien Labaune, Rozenn Bailleul-Lesuer, Laura D'Alessandro, Alison Whyte, John W. Bowen, Michel Menu, Gerard Mourou
FRONTIERS OF OPTOELECTRONICS
(2015)
Meeting Abstract
Chemistry, Multidisciplinary
J. Bianca Jackson, Gerard Mourou, Gillian C. Walker, Michael Bakunov, Michel Menu
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2013)
Proceedings Paper
Optics
Gillian C. Walker, J. Bianca Jackson, David Giovannacci, John W. Bowen, Bruno Delandes, Julien Labaune, Gerard Mourou, Michel Menu, Vincent Detalle
OPTICS FOR ARTS, ARCHITECTURE, AND ARCHAEOLOGY IV
(2013)
Proceedings Paper
Engineering, Electrical & Electronic
Gillian C. Walker, John W. Bowen, J. Bianca Jackson, Wendy Matthews, Julien Labaune, Gerard Mourou, Michel Menu, Ian Hodder
2012 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
(2012)
