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Affichage de 7131 à 7140 sur 16455

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

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⟩

Article dans une revue

A study on the effect of wire bonding interconnects of BCB capped CPW to CPW on LTCC substrate

Seonho Seok, Janggil Kim, Markku Lahti

The effect of wire bonding interconnects between BCB capped CPW on silicon chip and CPW on low temperature cofired ceramic (LTCC) package is presented. The Si chip is attached onto LTCC package using conductive silver epoxy. Two different bond wires, ribbon-wire and normal wire are used for the…

Microwave and Optical Technology Letters, 2014, 56 (6), pp.1378-1381. ⟨10.1002/mop.28355⟩. ⟨hal-00989526⟩

Article dans une revue

Multiple-Antenna Based Blind Spectrum Sensing in the Presence of Impulsive Noise

Kais Hassan, Roland Gautier, Iyad Dayoub, Marion Berbineau, Emanuel Radoi

Cognitive radio was proposed as a solution to the spectrum scarcity problem. One of the basic functions of any cognitive radio is the spectrum sensing. Most of the existing works on spectrum sensing consider the Gaussian noise assumption. In practice, this assumption is not always valid since…

IEEE Transactions on Vehicular Technology, 2014, 63 (5), pp.2248-2257. ⟨10.1109/TVT.2013.2290839⟩. ⟨hal-00939015⟩

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⟩