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Affichage de 4141 à 4150 sur 16434

Communication dans un congrès

Low-Temperature-Grown Gallium Arsenide Photoconductors with Photoresponse Reaching 25 mA/W under 1550nm Cw Excitation

Charbel Tannoury, Maximilien Billet, Christophe Coinon, Jean-Francois Lampin, Emilien Peytavit

We show in this communication that photoconductors based on GaAs grown at low temperature can exhibit photoresponses as high as 25 mA/W under continuous-wave 1550-nm-wavelength illumination. It is achieved by using an optical Fabry-Pérot cavity in order to improve the external quantum efficiency…

2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Nov 2020, Buffalo, NY, USA, United States. pp.1-1, ⟨10.1109/IRMMW-THz46771.2020.9370757⟩. ⟨hal-03191465⟩

Communication dans un congrès

W Band Carbon Nanotubes Interconnects Compatible with CMOS Technology

Philippe Roux-Levy, Joseph de Saxce, Chun Fei Siah, Jianxiong Wang, Beng Kang Tay, Philippe Coquet, Dominique Baillargeat

The following topics are dealt with: III-V semiconductors; wide band gap semiconductors; gallium compounds; CMOS integrated circuits; 5G mobile communication; band-pass filters; antenna phased arrays; Ge-Si alloys; BiCMOS integrated circuits; and array signal processing.

2020 IEEE/MTT-S International Microwave Symposium (IMS), Aug 2020, Los Angeles, United States. pp.1047-1050, ⟨10.1109/IMS30576.2020.9223919⟩. ⟨hal-03140962⟩

Article dans une revue

Proposal for an integrated silicon-photonics terahertz gas detector using photoacoustics

Mattias Verstuyft, Elias Akiki, Benjamin Walter, Marc Faucher, Jean-Francois Lampin, Mathias Vanwolleghem, Bart Kuyken

A design and multiphysical model is presented for an on-chip gas sensor that transduces terahertz gas absorption through sound generation into a mechanical motion that can be read out externally. The signal is triply enhanced by designing a structure that functions simultaneously as an optical, an…

Optics Express, 2020, 28 (15), pp.22424. ⟨10.1364/OE.397272⟩. ⟨hal-03065114⟩

Article dans une revue

Channel Estimation Techniques for Millimeter-Wave Communication Systems: Achievements and Challenges

Kais Hassan, Mohammad Masarra, Marie Zwingelstein, Iyad Dayoub

The fifth-generation (5G) of cellular networks and beyond requires massive connectivity, high data rates, and low latency. Millimeter-wave (mmWave) communications is a key 5G enabling technology to meet these requirements thanks to its technical potentials that can be integrated with other 5G…

IEEE Open Journal of the Communications Society, 2020, 1, pp.1336-1363. ⟨10.1109/OJCOMS.2020.3015394⟩. ⟨hal-03455706⟩

Article dans une revue

Physicochemical characterizati on of the fuel by the ultrasound method

Said Soudani, Mohammed Mekkaoui, Georges Nassar, Ziane Derouiche

A physical medium, whatever its nature ,solid, liquid or gaseous is characterized by physicochemical parameter which are unique to it and which differentiate it from any other medium. But it can also be characterized and differentiated by its acoustic parameters: it’s like two sides of the same…

Computer Methods in Materials Science, 2020, 20 (1), pp.33-39. ⟨10.7494/cmms.2020.1.0651⟩. ⟨hal-03629657⟩

Communication dans un congrès

Hierarchical large-scale elastic metamaterials as an innovative passive isolation strategy for seismic wave mitigation

N. Kherraz, M. Miniaci, F. Bosia, A.S. S Gliozzi, M. Onorato, N.M. M Pugno

Large scale elastic metamaterials as an innovative passive isolation strategy for seismic waves has recently attracted increasing interest in the scientific community. In this work, we investigate the feasibility of an innovative design based on hierarchical organization of the unit cell, i.e. a…

14th International Congress on Artificial Materials for Novel Wave Phenomena, Metamaterials'2020, Sep 2020, New York City, NY, United States. pp.84-86, ⟨10.1109/Metamaterials49557.2020.9285161⟩. ⟨hal-03209110⟩

Communication dans un congrès

Evaluation of the transient EM interferences impact on the clear channel assessment in Wi-Fi communications

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

This paper presents a study about transient electromagnetic (EM) interferences produced by contact losses between the catenary and the pantograph and their impact on the Internet access on board trains. This study is focused on the assessment of the impact of these transient EM interferences on the…

33rd General Assembly and Scientific Symposium of the International-Union-of-Radio-Science, Aug 2020, Rome, Italy. 4 p., ⟨10.23919/URSIGASS49373.2020.9232260⟩. ⟨hal-03322809⟩

Communication dans un congrès

Scintillators from solution-processable perovskite halide single crystals or quantum dots: the good, the bad, and the ugly

M. D. Birowosuto, F. Maddalena, A. Xie, M. E. Witkowski, M. Makowski, W. Drozdowski, Philippe Coquet, Christophe Dujardin, Cuong Dang

Here we report X- and gamma-ray scintillation properties from solution-processable perovskite (SPP) halide single crystals and quantum dots. We tune the properties of single crystals by replacing the cation, changing the organic ammonium cation spacer, and varying the halide anion. For quantum dots…

Conference on Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XXII, Aug 2020, San Diego, CA, United States. 1149415, 8 p., ⟨10.1117/12.2569663⟩. ⟨hal-03322816⟩

Article dans une revue

L'infini au cours des siècles

Stefano Giordano, Manon Benedito

The fascinating history of the concept of infinity is indissolubly associated with the development of religions, philosophies, mathematics and natural sciences. At the time of the first Greek philosophers, the infinity, or áperion, was a negative concept to be avoided in all rigorous statements.…

K. Revue trans-européenne de philosophie et arts, 2020. ⟨hal-02947970⟩

Article dans une revue

Active control of the transmission of Lamb waves through an elastic metamaterial

W. Wang, B. Bonello, Bahram Djafari-Rouhani, X. Fang, Yan Pennec, J. Zhao, Y. Jin

We have numerically investigated the transmission of an antisymmetric Lamb wave through a line of silicon pillars erected onto a homogeneous silicon plate when the frequency is tuned to a resonant frequency of the pillars. For either a bending mode or a compressional mode, the resonators emit in…

Journal of Applied Physics, 2020, 128 (6), pp.065107. ⟨10.1063/5.0017526⟩. ⟨hal-02924674⟩