CHENAUD Boris
Organisme : Université Montpellier II
Maître de Conférences
Autre(s) thème(s) de recherche ou rattachement(s) : - Métrologie quantique
Boris.Chenaud
univ-montp2.fr
0467144508
Bureau: 39.0, Etg: 2, Bât: 21 - Site : Campus Triolet
Domaines de Recherche: - Physique/Physique/Physique Générale
- Physique/Physique Quantique
- Physique/Matière Condensée/Systèmes mésoscopiques et effet Hall quantique
- Physique/Matière Condensée/Science des matériaux
- Sciences de l'ingénieur/Micro et nanotechnologies/Microélectronique
- Physique/Physique/Instrumentations et Détecteurs
- Physique/Physique/Enseignement de la physique
- Mathématiques/Physique mathématique
- Physique/Physique mathématique
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Dernieres productions scientifiques :
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Plasma wave detectors for Terahertz wireless communication and fast imaging applications 
Auteur(s): TEPPE F. , Blin S, COQUILLAT D., DIAKONOVA N., Tohme L, CHENAUD B., Hisatake S, Arakawa K, Torres J, CONSEJO C., Nouvel P, SOLIGNAC P., Penarier A, Nagatsuma T, KNAP W.
Conference: 37th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 (Wollongong, NSW, AU, 2012-09-23)
Actes de conférence: Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2012 37th International Conference on, vol. p.1 (2012)
Ref HAL: hal-00816950_v1
Résumé: We report on Terahertz wireless communications and fast imaging experiments at 300 GHz, using nanometer-sized transistors as detectors. The physical mechanism of the detection is related to the overdamped plasma waves in the transistor channel.
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Quantum metrological triangle experiment at LNE: measurements on a three-junction R-pump using a 20 000:1 winding ratio cryogenic current comparator
Auteur(s): Devoille L., Feltin N., Steck B., CHENAUD B., Sassine S., Djordevic S., Seron O., Piquemal F.
(Article) Publié:
Measurement Science and Technology, vol. 23 p.124011 (2012)
Ref HAL: hal-00789063_v1
DOI: 10.1088/0957-0233/23/12/124011
Résumé: The direct closure of the quantum metrological triangle consists in achieving Ohm's law with the three effects used and investigated in quantum electrical metrology: the Josephson effect (JE), the quantum Hall effect (QHE) and the single-electron tunnelling effect (SET). The aim is to check the consistency of the phenomenological constants KJ, RK and QX associated with these effects and theoretically expressed with the fundamental constants e and h (elementary charge and Planck constant, respectively). Such an experiment is a contribution to a future redefinition of the International System of units (SI). In this paper, the experimental setup developed at LNE is described and the main obtained results are given. From a set of four measurements, agreement at a level of 1.3 parts in 105 was found between the quantum charge involved in the SET, i.e. QX, and the CODATA value of the elementary charge. The best measurement has shown a relative type-A uncertainty of 1.9 parts in 106, while the amplitude of the current generated by a metallic electron pump was as low as 3.6 pA.
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Terahertz Detection of quantum cascade laser emission by plasma waves in Nano-transistors
Auteur(s): CHENAUD B., TEPPE F., CONSEJO C., Torres J., SOLIGNAC P., DIAKONOVA N., COQUILLAT D., CHAUBET C., Wasilewski Z.r., Zholudev M., KNAP W., El fatimy A.
Conference: International TeraNano &GDRI Workshop (, JP, 2011-11-24)
Actes de conférence: Extended Abstract, vol. p.28P-05 (2011)
Ref HAL: hal-00814909_v1
Résumé: Terahertz Detection of quantum cascade laser emission by plasma waves in Nano-transistors
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Terahertz Detection of Quantum Cascade Laser Emission by Plasma Waves in Field Effect Transistors
Auteur(s): TEPPE F., CONSEJO C., Torres J., CHENAUD B., SOLIGNAC P., Fathololoumi S., Wasilewski Z. r., Zholudev M., DIAKONOVA N., COQUILLAT D., El fatimy A., BUZATU P., CHAUBET C., KNAP W.
(Article) Publié:
Acta Physica Polonica A, vol. 120 p.930-932 (2011)
Ref HAL: hal-00814490_v1
Résumé: We report on the resonant detection of a 3.1 THz radiation produced by a quantum cascade laser using a 250 nm gate length GaAs/AlGaAs field effect transistor at liquid nitrogen temperature. We show that the physical mechanism of the detection is related to the plasma waves excited in the transistor channel. The detection is enhanced by increasing the drain current and driving the transistor into saturation regime. These results clearly show that plasma wave nanometer-size transistors can be used as detectors in all-solid-state terahertz systems where quantum cascade lasers act as sources.
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Cyclotron resonance and interband optical transitions in HgTe/CdTe(013) quantum well heterostructures
Auteur(s): Ikonnikov A. v., ZHOLUDEV M., Spirin K. e., Lastovkin A. a., Maremyanin K. V., Aleshkin V. ya, Gavrilenko V. I., Drachenko O., Helm M., Wosnitza J., Goiran M., Mikhailov N. n., Dvoretskii S. a., TEPPE F., DIAKONOVA N., CONSEJO C., CHENAUD B., KNAP W.
(Article) Publié:
Semiconductor Science and Technology, vol. 26 p.125011 (2011)
Ref HAL: hal-00789103_v1
DOI: 10.1088/0268-1242/26/12/125011
Résumé: Cyclotron resonance spectra of 2D electrons in HgTe/CdxHg1−xTe (0 1 3) quantum well (QW) heterostructures with inverted band structure have been thoroughly studied in quasiclassical magnetic fields versus the electron concentration varied using the persistent photoconductivity effect. The cyclotron mass is shown to increase with QW width in contrast to QWs with normal band structure. The measured values of cyclotron mass are shown to be systematically less than those calculated using the 8 × 8 Kane model with conventional set of HgTe and CdTe material parameters. In quantizing pulsed magnetic fields (Landau level filling factor less than unity) up to 45 T, both intraband (CR) and interband magnetoabsorption have been studied at radiation wavelengths 14.8 and 11.4 µm for the first time. The results obtained are compared with the allowed transition energies between Landau levels in the valence and conduction bands calculated within the same model, the calculated energies being again systematically less (by 3-14%) than the observed optical transition energies.
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