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Affichage de 6981 à 6990 sur 16434

Article dans une revue

Optimization of photoswitch constituted of a coplanar line introducing an interdigitated MSM photodetector

Abdelkader Aissat, M. El Besseghi, Didier Decoster

In this paper we present the optimization of photoswitches constituted of a coplanar line introducing interdigitated MSM photodetectors in the central strip. The reflection and the transmission coefficients are studied with the aim of highlighting the influence of different geometrical parameters...

Superlattices and Microstructures, 2014, 72, pp.245-252. ⟨10.1016/j.spmi.2014.03.020⟩. ⟨hal-00994795⟩

Communication dans un congrès

Electrooptic and converse-piezoelectric properties of epitaxial GaN/Si structures for optoelectronic applications

Mireille Cuniot-Ponsard, Irma Saraswati, S.-M. Ko, Mathieu Halbwax, Y.-H. Cho, N.-R. Poespawati, El Hadj Dogheche

In order to take advantage in all-optic optoelectronic devices, we have investigated the optical and piezoelectric properties of GaN films deposited on (111) silicon. Films are epitaxially grown by MOCVD, thanks to a buffer made of (Al, Ga) N intermediate layers [1]. Structural properties of GaN...

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium K - Challenges for group III nitride semiconductors for solid state lighting and beyond, May 2014, Lille, France. ⟨hal-00961405⟩

Communication dans un congrès

UWB System Based on the M-OAM Modulation in IEEE.802.15.3a Channel

Khadija Hamidoun, Raja Elassali, Yassin El Hillali, Khalid Elbaamrani, Atika Rivenq, F. Elbahhar

Known for many years but unexploited in the field of communications, ultra wideband systems (UWB) can be a solution to the saturation of the frequency bands. The advantage of such systems is that they are inexpensive in energy because of the limitations imposed by the standard. Our work is to...

5th Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS), Apr 2014, Costa de Caparica, Portugal. pp.507-514, ⟨10.1007/978-3-642-54734-8_56⟩. ⟨hal-01274817⟩

Communication dans un congrès

Near-field Microwave Microscopy for Liquid Characterization

Sijia Gu, Kamel Haddadi, Tuami Lasri

A near-field microwave microscopy platform for the characterization of liquids is proposed. The technique is based on the association of a network analyzer and an evanescent microwave coaxial probe. The major feature of the system proposed is the development of a broadband tunable matching network...

44th European Microwave Conference (EuMC), Oct 2014, Rome, Italie. pp.628--631. ⟨hal-03224672⟩

Article dans une revue

Ultrawide-bandwidth single-channel 0.4-THz wireless link combining broadband quasi-optic photomixer and coherent detection

Guillaume Ducournau, P. Szriftgiser, Alexandre Beck, Denis Bacquet, Fabio Pavanello, Emilien Peytavit, Mohammed Zaknoune, Tahsin Akalin, Jean-Francois Lampin

Free space communications with huge data capacity have become a key point for the development of mobile access, services, and network technologies convergence. Wireless links using emerging terahertz technologies, also referred to as T-ray communications, have become an intensive research field...

IEEE Transactions on Terahertz Science and Technology, 2014, 4, pp.328-337. ⟨10.1109/TTHZ.2014.2309006⟩. ⟨hal-00987955⟩

Communication dans un congrès

Theoretical and experimental investigation of Lamb waves characteristics in AlN/TiN and AlN/TiN/NCD composite membranes

Ali Soltani, Abdelkrim Talbi, J-C Gerbedoen, Jean-Claude de Jaeger, Philippe Pernod, V. Mortet, A. Bassam

In this study, we present a theoretical and experimental investigations of the zero order quasi-symmetric (S0) Lamb waves mode propagating in AlN/TiN and AlN/TiN/NCD composite membranes. Theoretical analysis of S0 mode characteristics shows that The AlN/TiN membrane enables to achieve smooth...

IEEE International Ultrasonics Symposium (IUS), Sep 2014, Chicago, United States. pp.2047-2050, ⟨10.1109/ULTSYM.2014.0510⟩. ⟨hal-03276910⟩

Autre publication scientifique

Incertitudes des traitements des lésions hépatiques en radiothérapie stéréotaxique avec asservissement à la respiration

Marie Charoy

Le Centre Oscar Lambret traite avec le Cyberknife®, depuis juin 2007, les lésions hépatiques en conditions stéréotaxiques, avec un asservissement à la respiration par des repères externes corrélés à des grains implantés près de la cible. Les résultats cliniques montrent un excellent contrôle local...

2014. ⟨hal-01005131⟩

Article dans une revue

On detection method for soft iterative decoding in the presence of impulsive interference

Vincent Dimanche, Alban Goupil, Laurent Clavier, Guillaume Gelle

This paper deals with the performance improvement of soft iterative decoders in impulsive interference modeled by additive noise. In case of $alpha$-stable noise, the inputs of the belief propagation decoder are too complex to compute. We propose to use an approximation of the log likelihood ratio...

IEEE Communications Letters, 2014, 18, pp.945-948. ⟨10.1109/LCOMM.2014.2320921⟩. ⟨hal-01005616⟩

Article dans une revue

Temperature dependence of dynamic hysteresis behavior in Pb0.4Sr0.6TiO3 ferroelectric films

Kui Li, Tao Li, Gang Du, Denis Remiens, Xianlin Dong, Genshui Wang

The temperature (T) dependence of dynamic hysteresis behavior is investigated in low temperature crystallized Pb0.4Sr0.6TiO3 thin films between 85 K and 340 K. It was found that the temperature scaling relations for hysteresis area 〈A〉, remnant polarization Pr and coercive field Ec take the...

Solid State Communications, 2014, 192, pp.89-92. ⟨10.1016/j.ssc.2014.05.007⟩. ⟨hal-01005622⟩

Communication dans un congrès

Monte Carlo study of low and high-field electron transport in GaN-based heterostructures

Jean-Luc Thobel, François Dessenne, Christophe Dalle

Electron transport properties of GaN-based heterostructures are investigated by means of a Monte Carlo model, which considers a large number of subbands in several valleys. Room-temperature low-field mobility consistent with experimental results is obtained provided that screening of phonon...

17th International Workshop on Computational Electronics, IWCE 2014, 2014, Paris, France. paper D2, 4 p., ⟨10.1109/IWCE.2014.6865820⟩. ⟨hal-01005719⟩