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Communication dans un congrès

Design and fabrication of uni-travelling carrier (UTC) photodiode based on InxGa1-xN semiconductors

Bandar Alshehri, Karim Dogheche, P.I. Seetoh, J.H. Teng, S.J. Chua, Didier Decoster, El Hadj Dogheche

This work is focused both on InxGa1-xN single-layer and InxGa1-xN/GaN multilayered structures, with high Indium content (x>35%). In this study, InGaN/GaN films are epitaxially grown on sapphire substrates by metalorganic chemical vapor deposition (MOCVD). The microstructure of GaN and InxGa1-xN…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium K - Challenges for group III nitride semiconductors for solid state lighting and beyond, 2014, Lille, France. ⟨hal-00961396⟩

Communication dans un congrès

Polarization properties of specular and dense multipath components in a large industrial hall

Isabelle Vin, Davy Gaillot, Emmeric Tanghe, Wout Joseph, Pierre Laly, M. Lienard, Luc Martens

This paper presents a comprehensive analysis of the polarization characteristics of specular and dense multipath components in a large industrial hall, based on frequency-domain channel sounding experiments at 1.3 GHz. The RiMAX maximum-likelihood estimator is used to extract the full-polarimetric…

9th COST IC1004 Management Committee and Scientific Meeting, 2014, Ferrara, Italy. ⟨hal-00961432⟩

Communication dans un congrès

A decision feedback equalizer with channel-dependent power consumption for 60-GHz receiver

Ilias Sourikopoulos, Antoine Frappé, Andreas Kaiser, Laurent Clavier

The design of a baseband decision feedback equalizer, featuring a continuous-time digital delay line, is discussed within the context of a wireless, Line-Of-Sight, communication scenario over the 60-GHz band. BER simulations advocate for a critical-tap cancellation scheme, which leads to the…

IEEE International Symposium on Circuits and Systems, ISCAS 2014, 2014, Melbourne, Australia. pp.1484-1487, ⟨10.1109/ISCAS.2014.6865427⟩. ⟨hal-01055050⟩

Communication dans un congrès

A new optimal design method for electrostatically actuated silicon-based MEMS: Application to a micro-gripper with large stroke and high force resolution

A. Grira, C. Rotinat-Libersa, Bernard Legrand, L. Buchaillot

The design of Micro Electro Mechanical Systems (MEMS) is often based on the use of costly trial and error method which depends highly on the technical skills of the involved engineers. The drawback of such a procedure is to lead to sub-optimal designs and poor performance at the end. Some research…

1st International Conference on Engineering and Applied Sciences Optimization, OPT-i 2014, Jun 2014, Kos Island, Greece. pp.2407-2417. ⟨cea-01844451⟩

Communication dans un congrès

ZnO nanowires and PbS quantum dots for third-generation solar cells

Basma El Zein, Mutalifu Abulikemu, Erkki Alarousu, Omar F. Mohammed, Enrico Traversa, El Hadj Dogheche

Nanowires and quantum dots hold promising potency to enhance the performance of solar cells by improving light absorption, light trapping, exciton generation, and photoexcited-carrier collection. Quantum dot sensitized solar cells consist of three components: semiconductor quantum dots, one…

SPIE Photonics West, OPTO 2014, Conference 8987 - Oxide-based Materials and Devices V, 2014, San Francisco, CA, United States. ⟨hal-00964359⟩

Communication dans un congrès

Efficient reduction of thermal conductivity in silicon using phononic-engineered membranes

Valeria Lacatena, Maciej Haras, J.F. Robillard, Stéphane Monfray, Thomas Skotnicki, Emmanuel Dubois

Phononic crystals (PC) have been a remarkably active research field for more than two decades [1]. The principle of Bragg reflection on an artificial crystal-like structure leading to additional spectral (band gaps) and refractive (negative refraction, anisotropy) properties is scalable in any…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium D - Phonons and fluctuations in low dimensional structures, 2014, Lille, France. ⟨hal-00964542⟩

Communication dans un congrès

Optical properties of HgTe nanocrystals

Guy Allan, Christophe Delerue, Ali Al-Otaify, David J. Binks, Stephen V. Kershaw, Shuchi Gupta, Andrey L. Rogach

HgTe nanocrystals presently receive growing interest because the negative band gap in bulk HgTe enables tunability of the gap from the infrared to the near infrared in quantum dots thanks to the quantum confinement. Therefore we propose a tight-binding model of HgTe which gives an accurate band…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium F - Established and emerging nanocolloids : from synthesis & characterization to applications, 2014, Lille, France. ⟨hal-01015327⟩

Communication dans un congrès

Energy transfer between acoustic fields by dry frictional contacts for SHM: a lumped numerical analysis

Konstantinos Gryllias, Eric Chatelet, Francesco Massi, Emmanuel Moulin

This paper investigates the concept of transferring / pumping vibroacoustic energy from an ambient acoustic field towards a secondary acoustic field by exploiting the dry contact friction nonlinearities. The secondary acoustic field could be used, for instance, as a reference signal in structural…

The 26th International Conference on Noise and Vibration engineering, Sep 2014, Louvain, Belgium. ⟨hal-01569145⟩

Article dans une revue

Simultaneous bandgaps in LiNbO3 phoxonic crystal slab

Quentin Rolland, Samuel Dupont, Joseph Gazalet, Jean-Claude Kastelik, Yan Pennec, Bahram Djafari-Rouhani, Vincent Laude

We study simultaneous photonic and phononic crystal slabs created in Z-cut lithium niobate membranes. Bandgaps for guided waves are identified using the three-dimensional finite element method (FEM). Three lattices are considered: the square, the hexagonal, and the honeycomb lattices. We…

Optics Express, 2014, 22 (13), pp.16288-16297. ⟨10.1364/OE.22.016288⟩. ⟨hal-01018289⟩

Article dans une revue

Cascaded Brillouin fibre lasers coupled to unitravelling carrier photodiodes for narrow linewidth terahertz generation

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

Narrow linewidth terahertz (THz) generation using a cascaded Brillouin fibre laser structure and a unitravelling carrier photodiode is investigated. Using two distributed feedback lasers separated by > 1 THz with 1 MHz initial linewidth, the use of the cascaded Brillouin laser greatly increases…

Electronics Letters, 2014, 50 (9), pp.690-691. ⟨10.1049/el.2014.0521⟩. ⟨hal-01044685⟩