Publications

• Article dans une revue

Assessment of broadhand ultrasonic attenuation measurements in inhomogeneous media

Marc Goueygou, Bogdan Piwakowski, S. Ould Naffa, François Buyle-Bodin

In this paper, we address the problem of evaluating the acoustic attenuation of “difficult” media, i.e. highly attenuating and scattering media. In a broadband, through transmission setup, the signals acquired from such media are characterized by a poor signal-to-noise ratio. Therefore, an accurate…

Ultrasonics, 2002, 40 (1-8), pp.77-82. ⟨10.1016/S0041-624X(02)00094-X⟩. ⟨hal-00140145⟩

• Article dans une revue

Detection of chemical damage in concrete using ultrasound

S. Ould Naffa, Marc Goueygou, Bogdan Piwakowski, François Buyle-Bodin

This research deals with a non-destructive method for characterizing the degraded cover of concrete structures using high-frequency ultrasound (0.5–1 MHz). Although such a frequency range is unusual in civil engineering, it is well suited to the kind of defect to be detected, as it corresponds to a…

Ultrasonics, 2002, 40 (1-8), pp.247-251. ⟨10.1016/S0041-624X(02)00146-4⟩. ⟨hal-00140147⟩

• Communication dans un congrès

Rectifying molecular diodes from self-assembly on silicon

S. Lenfant, Christophe Krzeminski, C. Delerue, D. Vuillaume

Electronic Materials Conference, 2002, Santa Barbara, CA, United States. ⟨hal-00148725⟩

• Communication dans un congrès

Current rectification from sigma-pi self-assembled monolayers on silicon

S. Lenfant, Christophe Krzeminski, C. Delerue, D. Vuillaume

5th International Conference on Functionalized n-electron Systems, 2002, Ulm, Germany. ⟨hal-00148709⟩

• Autre publication scientifique

Conception et réalisation d'un séparateur acousto-optique de polarisation

A. Sakkour

2002. ⟨hal-00162705⟩

• Article dans une revue

From nanoelectronics to nanotechnology

Emmanuel Dubois

Belgian Journal of Electronics & Communications HF, 2002, 3, pp.9-16. ⟨hal-00250387⟩

• Communication dans un congrès

On the physical interest of some numerical methods for wave phase conjugation in active media

A. Merlen, Vladimir Preobrazhensky, Philippe Pernod

2002, pp.208. ⟨hal-00148692⟩

• Communication dans un congrès

High power performances of AlGaN/GaN HEMTs on sapphire substrate at F=4 GHz

N. Vellas, Christophe Gaquière, Y. Guhel, M. Werquin, D. Ducatteau, B. Boudart, Jean-Claude de Jaeger, Z. Bougrioua, Marie Germain, M. Leys, I. Moervan, S. Borghs

2002, 4 pp. ⟨hal-00149700⟩

• Communication dans un congrès

Analyse physique des HEMTs à base de nitrure de gallium

M. Elkhou, Michel Rousseau, Jean-Claude de Jaeger

GDR Semiconducteurs à large bande interdite, 2002, Montpellier, France. ⟨hal-00149718⟩

• Article dans une revue

High linearity performance of gallium nitride HEMT devices on silicon substrate at 4 GHz

Nicolas Vellas, Christophe Gaquière, Yannick Guhel, Matthieu Werquin, Frédéric Bue-Erkmen, Sylvain Laurent Delage, B. Boudart, Fabrice Semond, Jean-Claude de Jaeger

In this letter, we demonstrate that, for high linearity application, GaN devices benefit from their high drain-source bias voltages. An improvement up to 20 dB in intermodulation ratio can be observed at high power levels compared to usual GaAs PHEMT devices. This study demonstrates that the high…

IEEE Electron Device Letters, 2002, 23 (8), pp.461-463. ⟨10.1109/LED.2002.801328⟩. ⟨hal-00149698⟩