Publications HAL

2017

Journal articles

titre
2D and 3D Terahertz Imaging and X-Rays CT for Sigillography Study
auteur
Patrick Mounaix, Jean-Paul Guillet, M. Roux, K. Wang, X. Ma, F. Fauquet, H. Balacey, B. Recur, F. Darracq, M. Fabre, R. Durand, L. Bassel, J. Bou Sleiman, J.-B. Perraud
article
Journal of Infrared, Millimeter and Terahertz Waves, Springer Verlag, 2017, 38 (4), pp.483 - 494. 〈10.1007/s10762-017-0356-3〉
identifiant
hal-01653623
DOI
DOI : 10.1007/s10762-017-0356-3
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titre
Study of blood plasma optical properties in mice grafted with Ehrlich carcinoma in the frequency range 0.1–1.0 THz
auteur
Jean-Paul Guillet, Khodzitsky Mikhail, A. V. Cherkasova, Odlyanitskiy Evgeniy, O Kravtsenyuk, Smolyanskaya Olga
article
Quantum Electronics, Turpion, 2017
identifiant
hal-01660495
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Conference papers

titre
Art Painting Testing with Terahertz Pulse and Frequency Modulated Continuous Wave
auteur
Jean-Paul Guillet, Marie Roux, Kejian Wang, Xue Ma, Frederic Fauquet, Frederic Darracq, Patrick Mounaix
article
2017 Progress In Electromagnetics Research Symposium, May 2017, Saint Petersbourg, Russia
identifiant
hal-01546450
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titre
Terahertz Biomedical Imaging: From Multivariate Analysis and Detection to Material Parameter Extraction
auteur
Al-Ibadi Amel, Joyce Bou-Sleiman, Cassar Quentin, Gaëtan Macgrogan, Hugo Balacey, Zimmer Thomas, Patrick Mounaix, Jean-Paul Guillet
article
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), May 2017, Saint Petersbourg, Russia
identifiant
hal-01546451
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titre
Agar and Silica Gel Based Biotissue-mimicking Phantoms in THz Frequency Range
auteur
Odlyanitskiy Evgeniy, Smolyanskaya Olga, O Kravtsenyuk, Jean-Paul Guillet, Popov A, Khodzitsky Mikhail
article
2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), May 2017, Saint Petersbourg, Russia
identifiant
hal-01546453
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titre
HOBIT: Hybrid Optical Bench for Innovative Teaching
auteur
David Furio, Stéphanie Fleck, Bruno Bousquet, Jean-Paul Guillet, Lionel Canioni, Martin Hachet
article
CHI'17 - Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems, May 2017, Denver, United States. 2017, 〈10.1145/3025453.3025789〉
identifiant
hal-01455510
resume
Practical work in optics allows supporting the construction of knowledge, in particular when the concept to be learned remains diffuse. To overcome the limitations of the current experimental setups, we have designed a hybrid system that combines physical interaction and numerical simulation. This system relies on 3D-printed replicas of optical elements, which are augmented with pedagogical information. In this paper, we focus on the well-known Michelson interferometer experiment, widely studied in undergraduate programs of Science. A 3-months user study with 101 students and 6 teachers showed that, beyond the practical aspects offered by this system, such an approach enhances the technical and scientific learning compared to a standard Michelson interferometer experiment.
DOI
DOI : 10.1145/3025453.3025789
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https://hal.inria.fr/hal-01455510/file/HOBIT_CHI2017_authors.pdf BibTex
titre
Contrôle non destructif terahertz et fabrication additive
auteur
Jean-Paul Guillet, Patrick Mounaix
article
La photonique appliquée à l'aéronautique, Feb 2017, Bordeaux, France. 2017, 〈http://photonique.u-bordeaux.fr/Evenements/La-photonique-appliquee-a-l-aeronautique〉
identifiant
hal-01456318
resume
Les matériaux composites sont de plus en plus utilisés dans l’aéronautique, ce qui impose l’utilisateur de techniques de test non destructif adaptées. C’est dans ce contexte que les rayonnements électromagnétiques dans le domaine terahertz (de 100 GHz à 10 THz) sont utilisés au laboratoire IMS, aussi bien pour l’analyse de matériaux composites que de pièces fabriquées de façon additive.
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Patents

titre
Hybrid simulator and method for teaching optics or for training adjustment of an optical device
auteur
Lionel Canioni, Martin Hachet, Jean-Paul Guillet, Bruno Bousquet, David Furio
article
France, Patent n° : EP 3113153 A1. 2017
identifiant
hal-01536384
resume
The invention concerns a hybrid simulator (100) for teaching optics or for training adjustment of an optical device. According to the invention, the hybrid simulator (100) comprises at least one dummy optical component (10) physically simulating an optical device, at least one actuator device (30) for generating or simulating an adjustment of said dummy optical component (10), a sensor configured for detecting an adjustment signal representative of operating said actuator device (30), a digital processing system (90) comprising a numerical model for simulating an output numerical optical beam resulting from interaction between an input numerical optical beam and a numerical optical component representing said optical device as a function of said adjustment signal and a display system (2, 95) for displaying a visual signal (51, 52) representative of said output optical beam and/or augmented reality signals (60, 61, 62, 63).
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2016

Journal articles

titre
Terahertz imaging and tomography as efficient instruments for testing polymer additive manufacturing objects
auteur
Jean Baptiste Perraud, Anne Françoise Obaton, Joyce Bou-Sleiman, Benoit Recur, Hugo Balacey, Frederic Darracq, Jean-Paul Guillet, Patrick Mounaix
article
Applied optics, Optical Society of America, 2016, 55, pp.3462 - 3462. 〈10.1364/AO.55.003462.v003〉
identifiant
hal-01390875
resume
Additive manufacturing (AM) technology is not only used to make 3D objects but also for rapid prototyping. In industry and laboratories, quality controls for these objects are necessary though difficult to implement compared to classical methods of fabrication because the layer-by-layer printing allows for very complex object manufacturing that is unachievable with standard tools. Furthermore, AM can induce unknown or unexpected defects. Consequently, we demonstrate terahertz (THz) imaging as an innovative method for 2D inspection of polymer materials. Moreover, THz tomography may be considered as an alternative to x-ray tomography and cheaper 3D imaging for routine control. This paper proposes an experimental study of 3D polymer objects obtained by additive manufacturing techniques. This approach allows us to characterize defects and to control dimensions by volumetric measurements on 3D data reconstructed by tomography.
DOI
DOI : 10.1364/AO.55.003462.v003
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titre
Advanced Processing Sequence for 3-D THz Imaging
auteur
Hugo Balacey, Benoit Recur, Jean-Baptiste Perraud, Joyce Sleiman, Jean-Paul Guillet, Patrick Mounaix
article
IEEE Transactions on Terahertz Science and Technology, 2016, 6, pp.191 - 198. 〈10.1109/TTHZ.2016.2519263〉
identifiant
hal-01390881
resume
—In this paper, we present an advanced image processing sequence to perform nondestructive inspection from 3-D terahertz (THz) images. We develop all the steps starting from a 3-D tomographic reconstruction of a sample from radiographs acquired with a monochromatic millimeter-wave imaging system to an automated segmentation, extracting the different volumes of interest (VOI) composing the sample. This leads to 3-D visualiza-tion and dimensional measurements. This inspection is completed by a skeletonization and caliber analysis providing an accurate assessment of the structure, geometry, and morphology of the acquired object. Overall sequence is implemented onto an unique software and validated through different sample analysis.
DOI
DOI : 10.1109/TTHZ.2016.2519263
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titre
Liquid index matching for 2D and 3D terahertz imaging
auteur
J. B. Perraud, J. Bou Sleiman, B. Recur, H. Balacey, F. Simoens, J. P. Guillet, P. Mounaix
article
Applied optics, Optical Society of America, 2016, 55, pp.9185 - 9185. 〈10.1364/AO.55.009185〉
identifiant
hal-01394023
resume
Two-dimensional (2D) terahertz imaging and 3D visualization suffer from severe artifacts since an important part of the terahertz beam is reflected, diffracted, and refracted at each interface. These phenomena are due to refractive index mismatch and reflection in the case of non-orthogonal incidence. This paper proposes an experimental procedure that reduces these deleterious optical refraction effects for a cylinder and a prism made with polyethyl-ene material. We inserted these samples in a low absorption liquid medium to match the sample index. We then replaced the surrounding air with a liquid with an optimized refractive index, with respect to the samples being studied. Using this approach we could more accurately recover the original sample shape by time-of-flight tomography.
DOI
DOI : 10.1364/AO.55.009185
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Conference papers

titre
THz tomography and image processing : a new tool for polymer and ceramic additive manufacturing characrerization
auteur
Patrick Mounaix, Anne Françoise Obaton, Hugo Balacey, Jean Baptiste Perraud, Jean-Paul Guillet, Joyce Bou-Sleiman, Benoit Recur
article
Pharos event 2016, Oct 2016, Talence, France. 2016, 〈http://laphia.labex.u-bordeaux.fr/Actualites/PHAROS-Event-2016-Oct-24-26-2016-i3864.html〉
identifiant
hal-01404322
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titre
Frequency modulated continuous wave terahertz imaging for art restoration
auteur
Jean-Paul Guillet, Kejian Wang, Marie Roux, Frederic Fauquet, Frédéric Darracq, Patrick Mounaix
article
IRMMW 2016, Sep 2016, Copenhagen, Denmark. 〈10.1109/IRMMW-THz.2016.7758717〉
identifiant
hal-01418837
DOI
DOI : 10.1109/IRMMW-THz.2016.7758717
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titre
Frequency Modulated Continuous Wave Terahertz Imaging For Art Restoration
auteur
Patrick Mounaix, Frederic Darracq, Jean-Paul Guillet, Frederic Fauquet, Marie Roux, Kejian Wang
article
IRMMW 2016, Sep 2016, copenague, Denmark
identifiant
hal-01404415
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titre
Automated Data And Image Processing For Biomedical Sample Analysis
auteur
Patrick Mounaix, Hugo Balacey, Jean-Paul Guillet, Emma Pickwell-Macpherson, Gaëtan Macgrogan, Amel Alabadi
article
IRRMW 2016, Sep 2016, copenague, Denmark. 〈http://terahertz.dk/irmmwthz2016/〉
identifiant
hal-01404429
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Other publications

titre
Franco-Chinese Workshop : Collaboration in Photonics between University of Bordeaux and Huazhong University of Science and Technology
auteur
Jean-Paul Guillet, Patrick Mounaix, Lionel Canioni, Mythili Prakasam, Véronique Jubera, Vincent Dousset
article
Workshop on the photonics in fields of terahertz, materials for optics, advance imaging. 2016
identifiant
hal-01456327
resume
Workshop on the photonics exchanges between Bordeaux University and Huazhong University of Science and Technology, Wuhan, Hubei, China. 弗朗哥 - 中国研讨会:波尔多大学与华中科技大学光子学的合作
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Poster communications

titre
Réduction des effets de réfraction par immersion dans un liquide à adaptation d’indice pour l’imagerie terahertz 2D et 3D
auteur
Patrick Mounaix, Jean-Baptiste Perraud, Jean-Paul Guillet, Joyce Bou-Sleiman, François Simoens
article
Ecole doctorale de Bordeaux, Mar 2016, talence, France
identifiant
hal-01404449
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2015

Journal articles

titre
Room temperature Si–Ti thermopile THz sensor
auteur
Sofiane Ben Mbarek, Sébastien Euphrasie, Thomas Baron, Laurent Thiery, Pascal Vairac, Danick Briand, Jean-Paul Guillet, Laurent Chusseau
article
Microsystem Technologies, Springer Verlag, 2015, 21 (8), pp.1627 - 1631. 〈10.1007/s00542-014-2252-2〉
identifiant
hal-01634975
DOI
DOI : 10.1007/s00542-014-2252-2
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titre
Low-frequency noise effect on terahertz tomography using thermal detectors.
auteur
Jean-Paul Guillet, Benoît Recur, Hugo Balacey, Joyce Bou Sleiman, F. Darracq, Dean Lewis, Patrick Mounaix
article
Applied optics, Optical Society of America, 2015, 54 (22), pp.6758-6762. 〈10.1364/AO.54.006758〉
identifiant
hal-01263737
resume
In this paper, the impact of low-frequency noise on terahertz-computed tomography (THz-CT) is analyzed for several measurement configurations and pyroelectric detectors. We acquire real noise data from a continuous millimeter-wave tomographic scanner in order to figure out its impact on reconstructed images. Second, noise characteristics are quantified according to two distinct acquisition methods by (i) extrapolating from experimental acquisitions a sinogram for different noise backgrounds and (ii) reconstructing the corresponding spatial distributions in a slice using a CT reconstruction algorithm. Then we describe the low-frequency noise fingerprint and its influence on reconstructed images. Thanks to the observations, we demonstrate that some experimental choices can dramatically affect the 3D rendering of reconstructions. Thus, we propose some experimental methodologies optimizing the resulting quality and accuracy of the 3D reconstructions, with respect to the low-frequency noise characteristics observed during acquisitions.
DOI
DOI : 10.1364/AO.54.006758
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Conference papers

titre
Discrimination and identification of RDX/PETN explosives by chemometrics applied to terahertz time-domain spectral imaging
auteur
Joyce Bou Sleiman, Jb Perraud, Bruno Bousquet, Jean-Paul Guillet, Norbert Palka, Patrick Mounaix
article
VIII Millimetre Wave and Terahertz Sensors and Technology conference, Sep 2015, Toulouse, France. SPIE, 9651, 2015, Proceeding SPIE 9651, of the. Millimetre Wave and Terahertz Sensors and Technology VIII conference. 〈10.1117/12.2197442〉
identifiant
hal-01263937
resume
Detection of explosives has always been a priority for homeland security. Jointly, terahertz spectroscopy and imaging are emerging and promising candidates as contactless and safe systems. In this work, we treated data resulting from hyperspectral imaging obtained by THz-time domain spectroscopy, with chemometric tools. We found efficient identification and sorting of targeted explosives in the case of pure and mixture samples. In this aim, we applied to images Principal Component Analysis (PCA) to discriminate between RDX, PETN and mixtures of the two materials, using the absorbance as the key-parameter. Then we applied Partial Least Squares-Discriminant Analysis (PLS-DA) to each pixel of the hyperspectral images to sort the explosives into different classes. The results clearly show successful identification and categorization of the explosives under study.
DOI
DOI : 10.1117/12.2197442
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titre
Chemical imaging and quantification of RDX/PETN mixtures by PLS applied on terahertz time-domain spectroscopy
auteur
Joyce Bou Sleiman, Jb Perraud, Bruno Bousquet, Norbert Palka, Jean-Paul Guillet, Patrick Mounaix
article
40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015, Aug 2015, Hong Kong, China. 2015, Proceedings of the 40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015. 〈10.1109/IRMMW-THz.2015.7327791〉
identifiant
hal-01263833
resume
Chemometric analysis was applied on terahertz absorbance 3D images, in transmission. The goal is to automatically discriminate some explosives on images and quantify mixtures of RDX/PETN in the frequency range of 0.2-3 THz. Partial Least Square (PLS) was applied on THz absorbance multispectral images to quantify individual product inside pure samples and mixtures at each pixel on the image. Then the best score obtained is used to display the samples' images and provide the optimal frequencies combination for recognition purpose.
DOI
DOI : 10.1109/IRMMW-THz.2015.7327791
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titre
AMI : Augmented Michelson Interferometer
auteur
David Furio, Martin Hachet, Jean-Paul Guillet, Bruno Bousquet, Stéphanie Fleck, Patrick Reuter, Lionel Canioni
article
SPIE. ETOP - Education and Training in Optics & Photonics, Jun 2015, Bordeaux, France
identifiant
hal-01121917
resume
Experiments in optics are essential for learning and understanding physical phenomena. The problem with these experiments is that they are generally time consuming for both their construction and their maintenance, potentially dangerous through the use of laser sources, and often expensive due to high technology optical components. We propose to simulate such experiments by way of hybrid systems that exploit both spatial augmented reality and tangible interaction. In particular, we focus on one of the most popular optical experiments: the Michelson interferometer. In our approach, we target a highly interactive system where students are able to interact in real time with the Augmented Michelson Interferometer (AMI) to observe, test hypotheses and then to enhance their comprehension. Compared to a fully digital simulation, we are investigating an approach that benefits from both physical and virtual elements, and where the students experiment by manipulating 3D-printed physical replicas of optical components (e.g. lenses and mirrors). Our objective is twofold. First, we want to ensure that the students will learn with our simulator the same concepts and skills that they learn with traditional methods. Second, we hypothesis that such a system opens new opportunities to teach optics in a way that was not possible before, by manipulating concepts beyond the limits of observable physical phenomena. To reach this goal, we have built a complementary team composed of experts in the field of optics, human-computer interaction, computer graphics, sensors and actuators, and education science.
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https://hal.inria.fr/hal-01121917/file/AMI-ETOP15-final.pdf BibTex

2014

Journal articles

titre
Ordered subsets convex algorithm for 3D terahertz transmission tomography
auteur
Benoît Recur, Hugo Balacey, Joyce Bou Sleiman, Jean-Baptiste Perraud, Jean-Paul Guillet, Andrew Kingston, Patrick Mounaix
article
Optics Express, Optical Society of America, 2014, 22 (19), pp.23299-23309. 〈10.1364/OE.22.023299〉
identifiant
hal-01066999
resume
We investigate in this paper a new reconstruction method in order to perform 3D Terahertz (THz) tomography using a continuous wave acquisition setup in transmission mode. This method is based on the Maximum Likelihood for TRansmission tomography (ML-TR) first developed for X-ray imaging. We optimize the Ordered Subsets Convex (OSC) implementation of the ML-TR by including the Gaussian propagation model of THz waves and take into account the intensity distributions of both blank calibration scan and dark-field measured on THz detectors. THz ML-TR reconstruction quality and accuracy are discussed and compared to other tomographic reconstructions.
DOI
DOI : 10.1364/OE.22.023299
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https://hal.archives-ouvertes.fr/hal-01066999/file/RecurOE2014_PostPrint.pdf BibTex
titre
Aeronautics composite material inspection with a terahertz time-domain spectroscopy system
auteur
Franck Ospald, Wissem Zouathi, René Beigang, Carsten Matheis, Joachim Jonuscheit, Benoît Recur, Jean-Paul Guillet, Patrick Mounaix, Wouter Vleugels, Pablo Venegas Bosom, Laura Vega Gonzalez, Ion Lopez, Rafael Martinez Edo, Yehuda Sternberg, Marjike Vandewal
article
Optical Engineering, SPIE, 2014, 53 (3), pp.031208 (1-14). 〈10.1117/1.OE.53.3.031208〉
identifiant
hal-00942971
resume
The usability of pulsed broadband terahertz radiation for the inspection of composite materials from the aeronautics industry is investigated, with the goal of developing a mobile time-domain spectroscopy system that operates in reflection geometry. A wide range of samples based on glass and carbon fiber reinforced plastics with various types of defects is examined using an imaging system; the results are evaluated both in time and frequency domain. The conductivity of carbon fibers prevents penetration of the respective samples but also allows analysis of coatings from the reflected THz pulses. Glass fiber composites are, in principle, transparent for THz radiation, but commonly with significant absorption for wavelengths >1 THz. Depending on depth, matrix material, and size, defects like foreign material inserts, delaminations, or moisture contamination can be visualized. If a defect is not too deep in the sample, its location can be correctly identified from the delay between partial reflections at the surface and the defect itself.
DOI
DOI : 10.1117/1.OE.53.3.031208
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https://hal.archives-ouvertes.fr/hal-00942971/file/OspaldOE2014_53_3_031208-HAL.pdf BibTex
titre
A comprehensive study of the application of the EOP techniques on bipolar devices
auteur
Mohamed Mehdi Rebai, Frédéric Darracq, Jean-Paul Guillet, Bernou Elise, Kevin Sanchez, Philippe Perdu, Dean Lewis
article
Microelectronics Reliability, Elsevier, 2014, 54 (9-10), pp.2088-2092
identifiant
hal-01091179
resume
In addition to Emission Microscopy, Electro-Optical Probing (EOP) technique has shown its efficiency in the world of failure analysis since the last decades and its ability to measure waveforms on various devices. The different physical parameters that affect and modify the reflected laser probing beam through active silicon components are just beginning to be well known. All the physical and environmental parameters contribute to the modulation of the reflected laser probing beam onto structures under test. However, the origins of EOP signals from bipolar transistors junctions used in a lot of analog devices are not well known and not that much described in the literature. In this paper we present backside EOP signal measurements from bipolar devices. We compare these measurements on a failed transistor and on a reference transistor and we interpret the results according to a model previously developed for silicon devices (MOS and Bipolar)
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Conference papers

titre
Processing sequence for non-destructive inspection based on 3D terahertz images
auteur
Hugo Balacey, Perraud Jean-Baptiste, Joyce Bou Sleiman, Jean-Paul Guillet, Benoît Recur, Patrick Mounaix
article
Infrared, Millimeter-Wave, and Terahertz Technologies III, Oct 2014, Beijing, China. 〈http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1935495〉. 〈10.1117/12.2071889〉
identifiant
hal-01091194
resume
In this paper we present an innovative data and image processing sequence to perform non-destructive inspection from 3D terahertz (THz) images. We develop all the steps starting from a 3D tomographic reconstruction of a sample from its radiographs acquired with a monochromatic millimetre wave imaging system. Thus an automated segmentation provides the different volumes of interest (VOI) composing the sample. Then a 3D visualization and dimensional measurements are performed on these VOI, separately, in order to provide an accurate nondestructive testing (NDT) of the studied sample. This sequence is implemented onto an unique software and validated through the analysis of different objects
DOI
DOI : 10.1117/12.2071889
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titre
Temperature Effect on Reflected Laser Probing Signal of Multiple Elementary Substructures
auteur
Mohamed Mehdi Rebai, Frédéric Darracq, Jean-Paul Guillet, Philippe Perdu, Kevin Sanchez, Dean Lewis
article
21th International symposium on the Physical and Failure Analysis of integrated circuits, Jun 2014, Singapour, Singapore. IEEE, IEEE Conference Proceedings from the 21th International symposium on the Physical and Failure Analysis of integrated circuits, pp.370-374, 2014, IEEE Conference Proceedings from the 21th International symposium on the Physical and Failure Analysis of integrated circuits. 〈10.1109/IPFA.2014.6898165 〉
identifiant
hal-01091188
resume
Electro-Optical Probing (EOP) has shown its efficiency in the world of failure analysis. The different external physical parameters effects, especially the temperature, on the EOP signals are not well known and not that much described in the literature. In addition to thermoreflectance, the temperature is a parameter that affects directly the free carrier's distribution and carrier mobilities inside the semiconductor. Temperature also modifies the absorption coefficient and not only the refractive index as known in the thermo-reflectance domain. All the physical and environmental parameters contribute to the modulation of the reflected laser probing beam onto structures under test. In this paper we will expose the origins of the reflected laser beam and the impact of the temperature on the EOP signal. For the first time, all the parameters, including temperature, have been taken into account. It opens the door of laser probing techniques improvements in failure analysis of submicron devices.
DOI
DOI : 10.1109/IPFA.2014.6898165
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titre
Temperature Effect on Reflected Laser Probing Signal of Multiple Elementary Substructures
auteur
Mohamed Rebai, Frédéric Darracq, Jean-Paul Guillet, Philippe Perdu, Kévin Sanchez, D. Lewis
article
21th International symposium on the Physical and Failure Analysis of integrated circuits (IPFA), Jun 2014, Singapour, Singapore. IEEE, pp.374-378, 2014
identifiant
hal-01020683
resume
Electro-Optical Probing (EOP) has shown its efficiency in the world of failure analysis. The different external physical parameters effects, especially the temperature, on the EOP signals are not well known and not that much described in the literature. In addition to thermoreflectance, the temperature is a parameter that affects directly the free carrier's distribution and carrier mobilities inside the semiconductor. Temperature also modifies the absorption coefficient and not only the refractive index as known in the thermo-reflectance domain. All the physical and environmental parameters contribute to the modulation of the reflected laser probing beam onto structures under test. In this paper we will expose the origins of the reflected laser beam and the impact of the temperature on the EOP signal. For the first time, all the parameters, including temperature, have been taken into account. It opens the door of laser probing techniques improvements in failure analysis of submicron devices.
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2013

Journal articles

titre
Room temperature thermopile THz sensor
auteur
Sofiane Ben Mbarek, Sébastien Euphrasie, Thomas Baron, Laurent Thiery, Pascal Vairac, Bernard Cretin, Jean-Paul Guillet, Laurent Chusseau
article
Sensors and Actuators A: Physical , Elsevier, 2013, 193, pp.155-160. 〈10.1016/j.sna.2013.01.014〉
identifiant
hal-00790595
resume
In this paper, we present the conception, fabrication and characterization of a room temperature thermopile designed to detect electromagnetic fields at 3 THz. The absorber consists of a metallic grid made of one of the material of the thin film thermocouples. The design of the grid is based on a theoretical multilayer model using equivalent resistivity and taking into account small diffraction effects. For future work with sub-wavelength resolution, we have also studied the effect of the reduction of the size of the grids on the equivalent resistivity. The grid is deposited on a 1.5 mm-radius SiO2 circular membrane. The time constant of the sensor is measured with THz and optical sources and it is consistent with finite elements simulations. The sensitivity and the limit of detection are also evaluated. First results at 0.3 THz (and not at the designed frequency of 3 THz, because of limitations in the testing equipment) show a sensitivity of 35 nV/(W/m2) and a limit detection of the E-field of 23 V/m due to a significant amount of noise. Future perspectives are put forward to increase the sensitivity.
DOI
DOI : 10.1016/j.sna.2013.01.014
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2012

Journal articles

titre
Propagation Beam Consideration for 3D THz Computed Tomography
auteur
Benoît Recur, Jean-Paul Guillet, Inka Manek-Hönninger, Jean-Christophe Delagnes, William Benharbone, Pascal Desbarats, Jean-Philippe Domenger, Lionel Canioni, Patrick Mounaix
article
Optics Express, Optical Society of America, 2012, 20 (5), pp.5817-5829. 〈10.1364/OE.20.005817〉
identifiant
hal-00672679
resume
In this paper, a model of the beam propagation is developed according to the physical properties of THz waves used in THz computed tomography (CT) scan imaging. This model is first included in an acquisition simulator to observe and estimate the impact of the Gaussian beam intensity profile on the projection sets. Second, the model is introduced in several inversion methods as a convolution filter to perform efficient tomographic reconstructions of simulated and real acquired objects. Results obtained with three reconstruction methods (BFP, SART and OSEM) are compared to the techniques proposed in this paper. We focus our discussion on the efficiency of optimized algorithms to increase the overall quality and accuracy of the reconstructions.
DOI
DOI : 10.1364/OE.20.005817
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https://hal.archives-ouvertes.fr/hal-00672679/file/main.pdf BibTex
titre
Coupling and propagation of Sommerfeld waves at 100 and 300 GHz
auteur
Jean-Paul Guillet, Laurent Chusseau
article
Journal of Infrared, Millimeter and Terahertz Waves, Springer Verlag, 2012, pp 174-182. 〈10.1007/s10762-011-9854-x〉
identifiant
hal-01091187
resume
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 the range of a few hundreds of microns. A detailed experimental study of 100 and 300 GHz Sommerfeld waves propagating on stainless steel and tungsten wires is reported. The measured field at any distance from the wire compares well with theoretical predictions.
DOI
DOI : 10.1007/s10762-011-9854-x
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2011

Journal articles

titre
Continuous-wave scanning terahertz near-field microscope
auteur
Jean-Paul Guillet, L. Chusseau, R. Adam, T. Grosjean, A. Penarier, F.I. Baida, D. Charraut
article
Microwave and Optical Technology Letters, Wiley, 2011, 53 (3), pp.580-582. 〈10.1002/mop.25754〉
identifiant
hal-00565014
resume
A versatile cw measurement setup for terahertz near-field reflectometry is proposed. Propagation, coupling, and focusing of wire guided modes are used to achieve a λ/33 resolution while imaging a metal corner deposited on glass. The setup is source and detector independent owing to wave coupling and decoupling with differential phase plates.
DOI
DOI : 10.1002/mop.25754
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Conference papers

titre
First communication link using a 300-GHz source and a Si plasma-wave detector
auteur
R. Paquet, D. Lapeine, S. Blin, Jean-Paul Guillet, P. Nouvel, J. Torres, A. Penarier, L. Varani, Pierre Solignac, Dominique Coquillat, Frederic Teppe, Wojciech Knap
article
International TeraNano &GDRI Workshop, Nov 2011, Japan. pp.28P-07, 2011
identifiant
hal-00814904
resume
First communication link using a 300-GHz source and a Si plasma-wave detector
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2010

Conference papers

titre
Terahertz near-field imaging using a Y splitter and Sommerfeld wire waves on bare metal rods
auteur
Jean-Paul Guillet, L. Chusseau, R. Adam, T. Laurent, T. Grosjean, D. Charraut, A. Penarier
article
35th International Conference on Infrared, Millimeter and Terahertz Waves, Sep 2010, Rome, Italy. 2010
identifiant
hal-00584459
resume
We describe a near-field experiment using a Y splitter supporting cw THz Sommerfeld wire modes coupled and de-coupled with differential phase plates. Owing to a taper up to similar to 50 mu m of one of the Y ends, a near-field imaging resolution of similar to 90 mu m is demonstrated in agreement with calculations.
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Theses

titre
Développement d'un système de microscopie en champ proche térahertz
auteur
Jean-Paul Guillet
article
Electromagnétisme. Université de Montpellier, 2010. Français
identifiant
tel-01316243
resume
Ce travail présente des résultats sur la microscopie en champ proche terahertz utilisant deux types de sondes. La première sonde, dite à ouverture, comporte une facette de quelques dizaines de microns qui permet de capter principalement la composant transverse du champ électrique. La seconde sonde, qui utilise une pointe sensible à la composante longitudinale, a été également l'occasion d'une étude des modes guidés sur les guides d'ondes cylindriques. Ce travail comporte des simulations électromagnétiques FDTD et des expérimentations.
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https://tel.archives-ouvertes.fr/tel-01316243/file/these.pdf BibTex

2009

Journal articles

titre
Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at THz frequencies
auteur
R. Adam, L. Chusseau, T. Grosjean, A. Penarier, Jean-Paul Guillet, D. Charraut
article
Journal of Applied Physics, American Institute of Physics, 2009, 106 (7), pp.073107. 〈10.1063/1.3236665〉
identifiant
hal-00446937
resume
A passive probe antenna for cw near-field microscopy at millimeter and submillimeter wavelengths is defined. It is based on the coupling between a free-space linearly polarized propagating beam to a wire mode. This is obtained efficiently owing to a discontinuous phase plate. This passive “optical” structure allows either the generation of a subwavelength confinement of the longitudinal electric field (polarized along the wire antenna) or, due to reciprocity, the collection of the longitudinal component of the electric field (along the wire antenna) with subwavelength resolution. The emission and collection properties of the proposed antenna have been demonstrated experimentally using a preliminary realization designed to work at 0.1 THz. Experimental results are well supported by calculations
DOI
DOI : 10.1063/1.3236665
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Conference papers

titre
Micro-bolomètre à température ambiante pour la microscopie champs proche THz
auteur
S. Ben Mbarek, T. Baron, S. Euphrasie, L. Thiery, D. Briand, P. Vairac, B. Cretin, R. Adam, Laurent Chusseau, J.-P. Guillet, A. Penarier
article
GDR ONDES, Nov 2009, Paris, France
identifiant
hal-00440967
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titre
Theoretical and experimental studies of metallic grids absorption: Application to the design of a bolometer
auteur
S. Ben Mbarek, T. Baron, S. Euphrasie, B. Cretin, P. Vairac, R. Adam, Laurent Chusseau, J.-P. Guillet, A. Penarier
article
Eurosensors XXIII conference, Sep 2009, Lausanne, Switzerland. Elsevier, 1 (2009), 2009, 〈10.1016/j.proche.2009.07.283〉
identifiant
hal-00431047
resume
We present a theoretical model of metallic absorbers for electromagnetic waves. This model allows the design of any kind of structured absorber metallic films and dielectrics. The absorption theory of metallic structures was studied with aim of a room temperature bolometer design. To validate the theoretical concept, grids of size much larger than the wavelength were built and measured. Transmission, reflection and absorption results obtained at 0.3 THz are in good agreement with the model. Grids of size smaller than the wavelength were built and measured at RF frequencies. Results show the tremendous influence of grid size over wavelength in term of equivalent resistivity and absorption.
DOI
DOI : 10.1016/j.proche.2009.07.283
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2008

Journal articles

titre
Linear to radial polarization conversion in the THz domain using a passive system
auteur
T. Grosjean, F.I. Baida, R. Adam, Jean-Paul Guillet, L. Billot, P. Nouvel, J. Torres, A. Penarier, D. Charraut, L. Chusseau
article
Optics Express, Optical Society of America, 2008, 16 (23), pp.18895-18909. 〈10.1364/OE.16.018895〉
identifiant
hal-00347781
resume
This paper addresses a passive system capable of converting a linearly polarized THz beam into a radially polarized one. This is obtained by extending to THz frequencies and waveguides an already proven concept based on mode selection in optical fibers. The approach is validated at 0.1 THz owing to the realization of a prototype involving a circular waveguide and two tapers that exhibits a radially polarized beam at its output. By a simple homothetic size reduction, the system can be easily adapted to higher THz frequencies.
DOI
DOI : 10.1364/OE.16.018895
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