Jean-Paul Guillet personal page
In this collaborative article between Lytid, IMS and Noctylio, we explore the application of terahertz (THz) technology in tomography to create 3D reconstructions in real time. The experimental setup is based on a latest generation micro-bolometric camera with 240×320 pixels, equipped with an anti-reflective coated lens developed by Lytid, to record the projection images of…
This article examines the possibility of using a high frequency radar (300 GHz) to detect fractures and lithological changes in rocks. This study, carried out in collaboration between Federico Sanjuan (University of Pau, France) and the IMS laboratory (University of Bordeaux), is in the context of the improvement of the methods of detection and quantification…
This article focuses on improving diffraction imaging techniques in the field of Térahertz frequencies, by approaching the problem of data saturation due to the limited dynamic range of detection systems. We introduce with the ITMO team (Nikolay V Petrov Team) a new approach to algorithmic reconstruction which deals with saturated areas in the measured intensity…
Presentations of the latest HOBIT developments Martin Hachet (INRIA) presented in Jul 2021 the last HOBIT developments at the 13th annual International Conference on Education and New Learning Technologies in Spain (Virtual). You can watch the recorded presentation from the HAL open archive. More details about this publication https://hal.inria.fr/hal-03251807/ Hachet, M., Canioni, L., Guillet, J.…
This paper focuses on the analysis of time-domain data regarding the measurements conducted on a French Renaissance painting realized on a metal substrate (copper). We specifically focus on the dielectric characterization of the varnish layer and its ageing consequences on THz images. Principal investigators are Quentin Cassar and Corinna Koch Dandolo. The painting The oil…
Terahertz open source scanner Terahertz and millimeter waves technologies have followed to a decade of strong development, thanks to leading promising applications fields such as hyper-spectral imaging, non-destructive testing and spectroscopy. However, the generally high cost of such systems limits their use to academic research laboratories or high added value industries. With Teragogic project, we…
In this paper published in july 2020 in IEEE Transactions on Terahertz Science and Technology, we present a reflectometry sensing system associated with a frequency modulated continuous wave radar. Then, a solid immersion lens is added to the system to improve the resolution. Abstract of terahertz reflectometry setup Frequency Modulated Continuous Wave (FMCW) radar systems…
Collaboration with ITMO University about Terahertz After the visit of the great museum of optics in ITMO, Saint Petersbourg, Russia, an interesting discussion started with ITMO colleagues about terahertz phase retrieval and holography. We were also pleased to invite Nicholay Petrov at IMS Laboratory in Bordeaux. I am delighted to present here the results of…
This article presents a terahertz imaging system using a waveguide with a reflection topology. The system is based on a femtosecond pulse laser, a transceiver, and a silica pipe hollow-core waveguide. Silicon lens, beam splitter or coupler is no more required to manipulate the terahertz beam in free space, which makes this system setup more…
Les Echos, the french leading business daily publish today an article about the applications of Terahertz Waves in radio astronomy, scientific instrumentation, medical diagnostic, high-speed data communication, security, non-destructive quality control in industrial production and pharmacology. Several French researchers were interviewed and you will notably be able to find the results of work carried out…
As part of the Saphyr project, photonic and aeronautic prototypes from the Aquitaine region will be presented at the Paris Air show 2019. Visit our booth A120 Hall 4 to discuss terahertz waves applied to non-destructive testing. This project is in collaboration between the IMS laboratory (Laser & Terahertz Test Team) and R&D Vision.
Regulation limits from microwaves and infrared The terahertz region is between the radio frequency region and infrared. Both the IEEE RF safety standard [1] and the ANSI Laser safety standard [2] have limits into the terahertz region, but both safety limits are based on extrapolations. The ICNIRP recommends that between 10 GHz and 300 GHz, the power…
Origin of this word Smartphonics Smartphones have become ubiquitous objects in the daily lives of students. Rather than using them for entertainment, why not take advantage of this object to impart knowledge, experiment and teach? We use the word Smartpnonics in the context of using the smartphone for education, and not as a smartphone study…
This paper present the terahertz near field resonator developed in the framework of Nearsense project and pulse time domain images used to determine the best frequency and design the resonator. Mavarani, L., Hillger, P., Bücher, T., Grzyb, J., Pfeiffer, U. R., Cassar, Q., … & MacGrogan, G. (2018). NearSense–Advances Towards a Silicon-Based Terahertz Near-Field Imaging…
We This paper presents a fully-integrated 0.56 THz 128-pixel near-field 1-D sensor array with 10-12 μm lateral resolution. The sensing elements are based two parallel cross-bridged split-ring resonators that utilize a 3-D topology to exhibit high field confinement in the sensing spot. The sensor comprises a scalable excitation scheme that is designed to maximize the…
In the course of in vitro studies of blood of laboratory animals with progressing Ehrlich carcinoma, we have revealed the change of the blood plasma optical properties in the THz range, which can be used for developing the express diagnostics of the presence of oncological diseases. An applied software package is elaborated that allows the…
In this review, we describe dielectric properties of biological tissues and liquids in the context of terahertz (THz) biophotonics. We discuss a model of the THz dielectric permittivity of water and water-containing media, which yields analysis of the relaxation and damped resonant molecules modes. We briefly describe modern techniques of THz spectroscopy and imaging employed in biophotonics with a strong emphasize on a…
In this paper, we focus on data processing applied to terahertz FMCW measurement of a painting. Investigated paintings FMCW radar processing The proposed approach consist to use longitudinal information of FMCW signal to adjust amplitude. This calibration process was tested on a stepped target and then on the investigated painting, giving a more homogeneous result,…
Terahertz frequency band Terahertz (THz) waves is a part of the electromagnetic spectrum between infrared and microwave radiation corresponding to wavelenghts from 3 mm to 100 µm. In the frequency domain, it consists of the band from 100 GHz to 30 THz (See Fig 1.). For 1 Thz, wavelenght is about 300 µm, photo energy…
HOBIT was presented at Photonic West ’19 in the AR/VR exhibition.
Terahertz spectroscopy is a non-destructive analytical technique used in art conservation and restoration. It can provide compelling data concerning the composition and condition of culturally valuable and historical objects. Terahertz spectral databases of modern and ancient artists’ pigments exist, but lack explanations for the origins of the unique spectral features. This paper present terahertz spectra…
Welcome to my personal website! It presents my research activities at IMS laboratory in Bordeaux University and teaching at Bordeaux University Institute of Technology. You can find my list of publications or list of topics. To learn more about my research activities at IMS Laboratory, you can visit the Laser & terahertz test team website…
In this paper, we study of the impact of low-frequency noise on terahertz-computed tomography (THz-CT). Two acquisition methods are compared in order to analyze how the low frequency noise is projected into the 3D image after reconstruction.
In this paper, a processing sequence has been developed to achieve automated analysis and measurements from 3D terahertz acquisitions. This sequence first performs a tomographic reconstruction from a 3D acquisition made by a continuous millimetre wave system. This reconstruction is based on the Ordered Subsets Convex (OSC) algorithm and has been optimized for 3D THz…
This paper presents a CW terahertz near-field reflectometry setup using metal wires waveguide. This setup, developped at Montpellier University, is working at 100 GHz.
This paper presents terahertz non destructive test of 3D printed materials in the framework of MetAMMI project.
Ordered Subsets Convex (OSC) implementation for terahertz waves and comparison of the quality and the accuracy with other tomographic reconstructions.
This paper demonstrate how it is possible to take into account the physical properties of THz waves used in THz CT scan imaging as an improved beam propagation model. This more realistic model is clearly justified by the fact that previous models were simply relying on well-known and commonly applied X-ray reconstruction methods, which assume…
Balacey, H., Recur, B., Perraud, J. B., Sleiman, J. B., Guillet, J. P., & Mounaix, P. (2016). Advanced Processing Sequence for 3-D THz Imaging. IEEE Transactions on Terahertz Science and Technology, 6(2), 191-198.
Adam, R., Chusseau, L., Grosjean, T., Penarier, A., Guillet, J. P., & Charraut, D. (2009). Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at terahertz frequencies. Journal of Applied Physics, 106(7), 073107.
Grosjean, T., Baida, F., Adam, R., Guillet, J. P., Billot, L., Nouvel, P., … & Chusseau, L. (2008). Linear to radial polarization conversion in the THz domain using a passive system. Optics express, 16(23), 18895-18909.
Recur, B., Guillet, J. P., Manek-Hönninger, I., Delagnes, J. C., Benharbone, W., Desbarats, P., … & Mounaix, P. (2012). Propagation beam consideration for 3D THz computed tomography. Optics express, 20(6), 5817-5829.
Ospald, F., Zouaghi, W., Beigang, R., Matheis, C., Jonuscheit, J., Recur, B., … & González, L. V. (2014). Aeronautics composite material inspection with a terahertz time-domain spectroscopy system. Optical Engineering, 53(3), 031208-031208.
Yahiaoui, R., Guillet, J. P., de Miollis, F., & Mounaix, P. (2013). Ultra-flexible multiband terahertz metamaterial absorber for conformal geometry applications. Optics letters, 38(23), 4988-4990.
Guillet, J. P., Recur, B., Frederique, L., Bousquet, B., Canioni, L., Manek-Hönninger, I., … & Mounaix, P. (2014). Review of terahertz tomography techniques. Journal of Infrared, Millimeter, and Terahertz Waves, 35(4), 382-411.
Jean-Paul Guillet was born in Lyon, France in 1984. He is graduated from Montpellier University. He received the M.Sc and Ph.D degres in 2007 and 2010 in terahertz imaging from IES lab, Montpellier, France. The topic of this first research work was terahertz near field microscopy using electronics based components. During postdoc up to 2013,…
You can follow me via these networks: Scientific online networks and search engines Google Scholar Scientific journal search engine Google scholar is the best scientific search engine. You can use it to display all you paper. My Google Scholar page is https://scholar.google.fr/citations?user=Te3MRH8AAAAJ&hl=fr Researchgate The main research network ResearchGate is a free social network service for…
You can find here electronics applets made by Yoan Veyrac.
Interview about Bordeaux International Support in the framework of HUST collaboration : http://www.u-bordeaux.fr/Actualites/De-l-international/BIS-Jean-Paul-Guillet-temoigne
I was invited to Huazhong University of Science & Technology student music troupe end year concert. Very nice show!
We organized the annual educational seminar which brings together Electronics Engineering technological University departments throughout France in Bordeaux in 2015.
Introduction Terahertz time domain imaging, FMCW and spectroscopy are useful tools for art restorer to inspect paintings and other cultural. Thanks to the different terahertz equipments present on the terahertz platform in Bordeaux, we have set up collaborations with art restorers and researchers working on the analysis of works of art with terahertz. This article presents…
Wuhan is in the center of China in Hubei province.
I’m in charge of digital electronics and programming course (“Informatique Industrielle”) for 1st year of DUT GEII. This
Karnaugh map is a graphic method allowing to find the logical equation from a truth table. This free educative android application shows graphically the resolution of Karnaugh map. Download Karnaugh Map (free Android application) in Google Play Store
The coupling between a linearly-polarized gaussian beam and a Sommerfeld wave propagating on a circular metallic wire is obtained owing to a differential phase element inserted in front of the metal wire. At millimeter-wavelengths we calculate a theoretical maximum coupling efficiency of 32% for this system in spite of the metal nature and radius in…
My research part is at IMS la, the Bordeaux University, in the Laser&Terahertz Test Team. My teaching part is at IUT de Bordeaux. IMS Lab (research) Université de Bordeaux,Laboratoire IMS,351, cours de la Libération33405 Talence Cedex, France Tel +33 (0)5 40 00 21 11Fax +33 (0)5 40 00 66 44 Laser team website:IMS lab website: http://www.ims-bordeaux.fr IUT de…