Publications

• Article dans une revue

AlGaN/GaN HEMTS: material, processing, and characterization

F. Calle, T. Palacios, E. Monroy, J. Grajal, M. Verdu, Zahia Bougrioua, Ingrid Moerman

The growth of AlGaN/GaN high electron mobility transistor (HEMT) structures on sapphire by metal organic vapor phase epitaxy (MOVPE) is described, with special emphasis on procedures to reduce dislocation density. All the processing steps involved in the fabrication of nitride-based HEMTs have been…

Journal of Materials Science: Materials in Electronics, 2003, 14 (5/7), pp.271-277. ⟨10.1023/A:1023951323307⟩. ⟨hal-02906523⟩

• Communication dans un congrès

Comparaison des performances d'une antenne Vivaldi et d'un réseau de fentes imprimées à 94GHz

B. D. Nguyen, Claire Migliaccio, Christian Pichot, N. Rolland, K. Vanoverschelde, K. Yamamoto, N. Yonemoto, K. Yamada

13èmes Journées Nationales Microondes (JNM 2003), May 2003, Lille, France. pp.77-78. ⟨hal-00984136⟩

• Article dans une revue

Directional photon transfer between two wires

L. Dobrzynski, Abdellatif Akjouj, Bahram Djafari-Rouhani, Jerome O. Vasseur, Mohamed Bouazaoui, Jean-Pierre Vilcot, Arnaud Beaurain, Stefan Mc Murtry

The directional transfer of a single photon from one wire to another, leaving all other neighbor states unaffected, is of great importance. We present a simple coupling structure that makes such transfer possible, for any given photon wavelength and linewidth. We give closed-form expressions for…

Physical Review E , 2003, 67 (5), pp.057603/1-4. ⟨10.1103/PhysRevE.67.057603⟩. ⟨hal-03302158⟩

• Article dans une revue

Comparison of fully distributed and periodically loaded nonlinear transmission lines

J.-M. Duchamp, Philippe Ferrari, M. Fernandez, A. Jrad, X. Melique, S. Arscott, D. Lippens, R.G. Harrison

IEEE Transactions on Microwave Theory and Techniques, 2003, 51 (4), pp.1105-1116. ⟨10.1109/TMTT.2003.809621⟩. ⟨hal-02347830⟩

• Communication dans un congrès

Optoelectronic components and integrated circuits including up and down conversion techniques and hybrid integration technology

Didier Decoster, Samuel Dupont, V. Magnin

Microwave optical links can be considered as basic bricks for some emerging system applications such as optically supplied microwave antennas. Emitters, optical switching matrices, high speed photodetectors and specific components for up or down conversion, are generic devices or functions for…

NATO RTO, Optics Microwave Interactions, TTO-ENP-028, Sep 2002, Budapest (Hungary), Hungary. ⟨hal-00149658⟩

• Article dans une revue

Observation of large photonic band gaps and defect modes in one-dimensional networked waveguides

Jerome O. Vasseur, A Mir, Abdellatif Akjouj, J Vasseur, Bahram Djafari-Rouhani, N Fettouhi, E Boudouti, L. Dobrzynski, J Zemmouri

Journal of Physics: Condensed Matter, 2003, 15 (10), pp.1593-1598. ⟨10.1088/0953-8984/15/10/308⟩. ⟨hal-03302156⟩

• Article dans une revue

Evidence of an impurity band at an n-GaN/sapphire interface

C. Mavroidis, J.J. Harris, R.B. Jackman, Z. Bougrioua, I. Moerman

We report on temperature-dependent differential Hall-effect and resistivity measurements, between 10 and 300 K, on a silicon-doped GaN epitaxial layer grown by metalorganic chemical vapor deposition on a sapphire substrate. Reactive ion etching has been used to enable Hall measurements to be taken…

Diamond and Related Materials, 2003, 12 (3-7), pp.1127-1132. ⟨10.1016/S0925-9635(02)00395-3⟩. ⟨hal-02906520⟩

• Article dans une revue

Statistical Estimation of Fast Varying Channels for Cellular Mobile Telecommunications Systems

Iyad Dayoub, M. Zaizouni, Atika Rivenq, Jean-Michel Rouvaen

The time variant environment in fast channels severely impacts on the performances of classical equal-ization techniques. A method is proposed here to circumvent this problem, particularly in the severe channel with fast behaviour. To improve the Bit Error Rate (BER) at the receiver, a new approach…

Wireless Personal Communications, 2003, 24 (4), pp.527-536. ⟨10.1023/A:1023275221420⟩. ⟨hal-03508978⟩

• Article dans une revue

Adsorption behavior of conjugated {C}3-oligomers on Si(100) and HOPG surfaces

Gauthier Mahieu, B. Grandidier, Didier Stiévenard, Christophe Krzeminski, Christophe Delerue, C. Martineau, Jean Roncali

A pi-conjugated {C}3h-oligomer involving three dithienylethylene branches bridged at the meta positions of a central benzenic core has been synthesized and deposited either on the Si(100) surface or on the HOPG surface. On the silicon surface, scanning tunneling microscopy allows the observation of…

Langmuir, 2003, 19 (8), pp.3350-3356. ⟨10.1021/la026907n⟩. ⟨hal-00688536⟩

• Article dans une revue

Dimensionality-dependent self energy corrections and exchange-correlation potential in semiconductor nanostructures

Christophe Delerue, Guy Allan, Michel Lannoo

We study the quasiparticle gap in semiconductor nanostructures versus dimensionality and compare it to the value obtained in the local density approximation. We first develop general arguments based on the GW approach which we then substantiate numerically by a tight binding version of this theory…

Physical Review Letters, 2003, 90, pp.076803/1-4. ⟨10.1103/PhysRevLett.90.076803⟩. ⟨hal-00146609⟩