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Communication dans un congrès

High efficiency UTC photodiodes as photonic emitters for 300 GHz high spectral efficiency wireless communications

Philipp Latzel, Fabio Pavanello, Sara Bretin, Maximilien Billet, Emilien Peytavit, Jean-Francois Lampin, Mohammed Zaknoune, Guillaume Ducournau

This paper presents the development and use of high-efficiency Unitravelling carrier photodiodes for THz communications. Using these devices, high output power is obtained close to the mW level. THz wireless links demonstration is also presented using these devices, using high-level modulation…

11th European Conference on Antennas and Propagation (EUCAP), Mar 2017, Paris, France. ⟨10.23919/EuCAP.2017.7928278⟩. ⟨hal-03286168⟩

Article dans une revue

Generation of mW level in the 300-GHz band using resonant-cavity-enhanced unitraveling carrier photodiodes

Philipp Latzel, Fabio Pavanello, Maximilien Billet, Sara Bretin, Alexandre Beck, Mathias Vanwolleghem, Christophe Coinon, Xavier Wallart, Emilien Peytavit, Guillaume Ducournau, Mohammed Zaknoune, Jean-Francois Lampin

We present a resonant-cavity-enhanced broadband unitraveling carrier photodiode optimized for terahertz (THz) generation. It uses a novel semitransparent top-contact utilizing subwavelength apertures for enhanced optical transmission. The contact allows front-side illumination of the photodiode…

IEEE Transactions on Terahertz Science and Technology, 2017, 7 (6), pp.800-807. ⟨10.1109/TTHZ.2017.2756059⟩. ⟨hal-03286186⟩

Communication dans un congrès

Microfabricated PEDOT trilayer actuators: synthesis, characterization, and modeling

Ngoc Tan Nguyen, Cedric Plesse, Caroline Soyer, Sébastien Grondel, John D.W. Madden, Eric Cattan, Frédéric Vidal

Conducting polymer actuators have long been of interest as an alternative to piezoelectric and electrostatic actuators due to their large strains and low operating voltages. Recently, poly (3,4-ethylenedioxythiophene) (PEDOT) - based ionic actuators have been shown to overcome many of the initial…

SPIE Conference on Electroactive Polymer Actuators and Devices (EAPAD), Mar 2017, Portland, OR, United States. ⟨10.1117/12.2260431⟩. ⟨hal-03280257⟩

Article dans une revue

Reduced graphene oxide decorated with Co3O4 nanoparticles (rGO-Co3O4) nanocomposite: A reusable catalyst for highly efficient reduction of 4-nitrophenol, and Cr(VI) and dye removal from aqueous solutions

Amer Al-Nafiey, Ahmed Addad, Brigitte Sieber, Guillaume Chastanet, Alexandre Barras, Sabine Szunerits, Rabah Boukherroub

Water contamination with synthetic dyes and metal ions is an escalating problem, despite the huge research efforts put in the field of water treatment. The paper reports on one-step synthesis of reduced graphene oxide-cobalt oxide nanoparticles (rGO-Co3O4) nanocomposite under mild conditions. The…

Chemical Engineering Journal, 2017, 322, pp.375-384. ⟨10.1016/j.cej.2017.04.039⟩. ⟨hal-01520632⟩

Article dans une revue

Negative Differential Resistance, Memory and Reconfigurable Logic Functions Based on Monolayer Devices Derived From Gold Nanoparticles Functionalized With Electropolymerizable Thiophene-EDOT Units

Tiantian Zhang, David Guérin, F. Alibart, Dominique Vuillaume, Kamal Lmimouni, Stéphane Lenfant, Ali Yassin, Maiténa Oçafrain, Philippe Blanchard, Jean Roncali

We report on hybrid memristive devices made of a network of gold nanoparticles (10 nm diameter) functionalized by tailored 3,4-(ethylenedioxy)thiophene (TEDOT) molecules, deposited between two planar electrodes with nanometer and micrometer gaps (100 nm to 10 μm apart), and electropolymerized in…

Journal of Physical Chemistry C, 2017, 121 (18), pp.10131-10139. ⟨10.1021/acs.jpcc.7b00056⟩. ⟨hal-02564472⟩

Article dans une revue

High temperature gradient nanogap-Pirani micro-sensor with maximum sensitivity around atmospheric pressure

Cécile Ghouila-Houri, Abdelkrim Talbi, R. Viard, M. Moutaouekkil, O. Elmazria, Q. Gallas, E. Garnier, A. Merlen, Philippe Pernod

This letter describes and discusses the design and testing of an effcient nanogap Pirani micro-sensor for pressure measurements in a wide range with a maximum sensitivity around atmospheric pressure. The structure combines a substrate-free heated wire and mechanical support using silicon oxide…

Applied Physics Letters, 2017, 111, pp.113502. ⟨10.1063/1.4995364⟩. ⟨hal-01635348⟩

Article dans une revue

Low Complexity Joint Blind Equalization and CFO Estimation for MC-CDMA System

Kais Bouallegue, Iyad Dayoub, M Gharbi, Kaïs Hassan, R. Masmoudi, A. Djebbar

Based on the orthogonality between the used and the unused spreading codes (excess codes) subspaces in one hand and on the restoration of guard interval redundancy of Multicarrier Code Division Multiple Access signal in other hand, we propose joint Carrier Frequency Offset and time domain equalizer…

Wireless Personal Communications, 2017, 92 (2), pp.315-331. ⟨10.1007/s11277-016-3545-9⟩. ⟨hal-03382946⟩

Article dans une revue

IEEE 802.11n Communications in the Presence of Frequency-Sweeping Interference Signals

Virginie Deniau, Christophe Gransart, Grecia Romero, Eric Pierre Simon, Joumana Farah

This paper presents an analysis of the impact of intentional electromagnetic (EM) interferences on the performance of Wi-Fi communications. The goal is to analyze the susceptibility of orthogonal frequency-division multiplexing (OFDM) signals and to understand how certain parameters of the…, Cet article présente une analyse de l'impact des interférences électromagnétiques intentionnelles (IEMI) sur la performance des communications Wi-Fi. L'objectif est d'analyser la susceptibilité des signaux de OFDM (Orthogonal Frequency Division Multiplex ) et de comprendre comment…

IEEE Transactions on Electromagnetic Compatibility, 2017, 9p. ⟨10.1109/TEMC.2017.2684428⟩. ⟨hal-01524700⟩

Article dans une revue

Complexity of the hot carrier relaxation in Si nanowires compared to bulk

Jing Li, Yann-Michel Niquet, Christophe Delerue

We investigate the relaxation of hot carriers by emission of phonons in bulk Si and Si nanowires (NWs) with an identical atomistic methodology. The phonon scattering is strongly enhanced in NWs. At high excitation energy, the carrier cooling is faster in NWs than in bulk, mainly due to the coupling…

Physical Review B, 2017, 95 (20), pp.205401. ⟨10.1103/PhysRevB.95.205401⟩. ⟨hal-02015399⟩

Article dans une revue

A 4-fJ/spike artificial neuron in 65 nm CMOS technology

Ilias Sourikopoulos, Sara Hedayat, Christophe Loyez, Francois Danneville, Virginie Hoel, Eric Mercier, A. Cappy

As Moore's law reaches its end, traditional computing technology based on the Von Neumann architecture is facing fundamental limits. Among them is poor energy efficiency. This situation motivates the investigation of different processing information paradigms, such as the use of spiking neural…

Frontiers in Neuroscience, 2017, 11, pp.123. ⟨10.3389/fnins.2017.00123⟩. ⟨hal-03283312⟩