Publications

Affichage de 4741 à 4750 sur 16055

THESE

Echantillonnage de signaux radar par voie optoélectronique : étude des non-linéarités des photoconducteurs à cavité résonante, Optoelectronic radar signal sampling : study of non-linearities of resonant cavity photoconductors

Yann Desmet

Nous étudions ici le comportement non-linéaire d’un photoconducteur utilisé pour l’échantillonnage hyperfréquence. L’absorption optique dans ces photoconducteurs est optimisée grâce à l’utilisation d’une cavité résonante. Nous avons tout d’abord procédé à un travail de caractérisation de…, This thesis aims to study the nonlinear behavior of a photoconductor used as a microwave sampler. These photoconductors optimize the optical absorption thanks to a Fabry-Pérot resonant cavity. We first carried out a characterization work of photoconductors with different geometrical properties (…

Micro et nanotechnologies/Microélectronique. Université de Lille, 2018. Français. ⟨NNT : 2018LILUI019⟩. ⟨tel-03623290⟩

POSTER

How To Design Your Polymer Artificial Muscle Actuator/ Sensor?

Marwa A Eldiwiny, Eric Cattan, Christian Duriez

Nature is a source of inspiration for scientists and engineers to design new systems and solutions. To the date, science still unable to unveil the secret behind the tiny complex soft creatures. Can you imagine creating a fly, or even a worm as same as in our world, there are basic compelling…

ICRA 2018 - IEEE International Conference on Robotics and Automation, May 2018, Brisbane, Australia. pp.1-2. ⟨hal-01798709⟩

ART

Single-channel 100 Gbit/s transmission using III–V UTC-PDs for future IEEE 802.15.3d wireless links in the 300 GHz band

Vinay Kumar Chinni, Philipp Latzel, Malek Zegaoui, Christophe Coinon, X. Wallart, Emilien Peytavit, Jean-Francois Lampin, Klaus Engenhardt, P. Szriftgiser, M. Zaknoune, Guillaume Ducournau

The achievement of single-channel 100 Gbit/s transmission, using linear unitravelling carrier photodiodes and QAM-16 modulation format is reported. The wireless link has been done in the indoor case, considering the recent frequency standardised 300 GHz bands.

Electronics Letters, 2018, 54 (10), pp.638-640. ⟨10.1049/el.2018.0905⟩. ⟨hal-02337341⟩

THESE

Étude de semiconducteurs III-V non-stoechiométriques pour l'échantillonnage de signaux hyperfréquences, Study of non-stoichiometric III-V semiconductors for microwave signals sampling

Thomas Demonchaux

L’arséniure de gallium épitaxié à basse température (GaAs-BT) présente des propriétés d’intérêt pour l’opto-électronique. Ses propriétés sont liées à la présence de défauts ponctuels à l’origine des temps de vie compatibles avec son utilisation en tant que couche active dans des photo-commutateurs…, Low temperature grown gallium arsenide (LTG-GaAs) has shown interesting properties for optoelectronics. These properties are related to point defects within the material wich permits carrier lifetimes compatible with its use as an active layers in photoswitches. In order to improve the current…

Micro et nanotechnologies/Microélectronique. Université de Lille, 2018. Français. ⟨NNT : 2018LILUI049⟩. ⟨tel-03622412⟩

COMM

Detection of the vocal cords' vibrations: Effect of the transducer's position

Dany Ishac, Antoine Abche, Sandrine Matta, Elie Karam, Georges Nassar, Dorothee Callens

A method to acquire the signal of the vocal cords' vibrations was developed and presented. It is a non-invasive method that is based on attaching a transducer element to a collar and wrapping it around the individual's neck. The Short Term Fourier Transform (STFT) technique is applied on…

IEEE International Instrumentation and Measurement Technology Conference (I2MTC 2018), May 2018, Houston, TX, United States. pp.1-6, ⟨10.1109/I2MTC.2018.8409742⟩. ⟨hal-03547519⟩

COMM

[Review] A review of the six-port technique for metrology applications

Simon Lallemand, Kamel Haddadi, Christophe Loyez

The six-port measurement technique has played a major role in microwave metrology, particularly within the community of national standards laboratories. The six-port reflectometer provides a simple method of implementing one-port and dual-six-port vector network analyzer. This paper reviews the…

2018 22nd International Microwave and Radar Conference (MIKON), May 2018, Poznan, Poland. ⟨10.23919/MIKON.2018.8405340⟩. ⟨hal-04054247⟩

COMM

Experimental Demonstration of 16dB Isolation at Room Temperature on a Magnetoplasmonic One-Way Mirror Exploiting THz Cyclotron Resonances in Narrow Gap Semiconductors

Oleksandr Stepanenko, Tomáš Horák, Jan Chochol, Kamil Postava, Jean-Francois Lampin, Mathias Vanwolleghem

We demonstrate experimentally a nonreciprocal magnetoplasmonic mirror that achieves room temperature isolation with a rejection rate of 16dB by combining the THz plasma frequency of intrinsic small-gap InSb with its strong THz cyclotron effects. At typical THz QCL temperatures this goes up to 25dB.

CLEO: Science and Innovations, May 2018, San Jose, United States. pp.STu4D.7, ⟨10.1364/CLEO_SI.2018.STu4D.7⟩. ⟨hal-02407839⟩

COMM

Modeling of Rosen-type piezoelectric transformer by mean of a polynomial approach

Derandraibe Jeannot Falimiaramanana, Faniry Emilson Ratolojanahary, Ismail Naciri, P.M. Rabotovao, Lahoucine Elmaimouni, Jean-Etienne Lefebvre, Mohamed Rguiti, Tadeusz Gryba

The electromechanical behavior of piezoelectric transformers (PTs) is predicted using a polynomial approach. It is the first time that a polynomial method is applied to study structures made up of both an actuator and a transducer. The method consists in incorporating directly into the equations of…

6th International Conference on Multimedia Computing and Systems (ICMCS 2018), May 2018, Rabat, Morocco. pp.143-148, ⟨10.1109/ICMCS.2018.8525914⟩. ⟨hal-03582336⟩

ART

Design and Simulation of InGaN/GaN p-i-n Photodiodes

Mourad Elbar, Bandar Alshehri, Souad Tobbeche, El Hadj Dogheche

InGaN ternary alloys with their band gaps varying from 0.7 to 3.4eV, are very promising for photodetector devices operating from UV to IR wavelength range. Using Silvaco-Atlas software, an In0.1Ga0.9N/GaN based p-i-n photodiode is designed and the J-V characteristics, the spectral responsivity, the…

Physica Status Solidi A (applications and materials science), 2018, 215 (9), pp.1700521. ⟨10.1002/pssa.201700521⟩. ⟨hal-03183477⟩

COMM

Computation of dispersion curves of guided waves in functionally graded materials

Salah-Eddine Hebaz, Farouk Benmeddour, Emmanuel Moulin, Jamal Assaad

The study of dispersive behavior of guided waves is of great interest in non-destructive testing and development of inspection systems. In this work, a semi-analytical numerical formulation for the computation of dispersion curves and mode shapes in plate-like structures is presented. The…

175th Meeting of the Acoustical Society of America, May 2018, Minneapolis, United States. pp.045002, ⟨10.1121/2.0001014⟩. ⟨hal-02502406⟩