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Affichage de 5081 à 5090 sur 16170

Article dans une revue

Gallium nitride MEMS resonators: how residual stress impacts design and performances

Christophe Morelle, Didier Theron, Joff Derluyn, Stefan Degroote, Marianne Germain, Victor Zhang, Lionel Buchaillot, Bertrand Grimbert, Pascal Tilmant, Francois Vaurette, Isabelle Roch-Jeune, Virginie Brandli, Vanessa Avramovic, Etienne Okada, Marc Faucher

Starting from Gallium Nitride epitaxially grown on silicon, pre-stressed micro-resonators with integrated piezoelectric transducers have been designed, fabricated, and characterized. In clamped-clamped beams, it is well known that tensile stress can be used to increase the resonant frequency. Here…

Microsystem Technologies, 2018, 24 (1), pp.371-377. ⟨10.1007/s00542-017-3293-0⟩. ⟨hal-03183510⟩

Article dans une revue

Ultra-low loss ridge waveguides on lithium niobate via argon ion milling and gas clustered ion beam smoothening

Shawn Yohanes Siew, Eric Jun Hao Cheung, Haidong Liang, Andrew Bettiol, Noriaki Toyoda, Bandar Alshehri, El Hadj Dogheche, Aaron J. Danner

Lithium niobate's use in integrated optics is somewhat hampered by the lack of a capability to create low loss waveguides with strong lateral index confinement. Thin film single crystal lithium niobate is a promising platform for future applications in integrated optics due to the availability…

Optics Express, 2018, 26 (4), pp.4421-4430. ⟨10.1364/OE.26.004421⟩. ⟨hal-03183505⟩

Article dans une revue

Colloidal nanocrystals as LEGO® bricks for building electronic band structure models

Athmane Tadjine, Christophe Delerue

Abstract The synthesis of self-assembled semiconductor nanocrystal (NC) superlattices using oriented attachment recently became a flourishing research topic. This technique already produced remarkable forms of NC superlattices, such as linear chains, mono and multilayer square lattices, and…

Physical Chemistry Chemical Physics, 2018, 20 (12), pp.8177-8184. ⟨10.1039/C7CP08400E⟩. ⟨hal-02133332⟩

Article dans une revue

Optimization of pentacene double floating gate memories based on charge injection regulated by SAM functionalization

S. Li, David Guérin, Stéphane Lenfant, K. Lmimouni

Pentacene based double nano-floating gate memories (NFGM) by using gold nanoparticles (Au NPs) and reduced graphene oxide (rGO) sheets as charge trapping layers are prepared and demonstrated. Particularly, the NFGM chemically treated by 2,3,4,5,6-pentafluorobenzenethiol (PFBT) self-assembled…

AIP Advances, 2018, 8 (2), pp.025110. ⟨10.1063/1.5010403⟩. ⟨hal-03185609⟩

Article dans une revue

Perspective: organic electronic materials and devices for neuromorphic engineering

Sébastien Pecqueur, Dominique Vuillaume, F. Alibart

Neuromorphic computing and engineering has been the focus of intense research efforts that have been intensified recently by the mutation of Information and Communication Technologies (ICT). In fact, new computing solutions and new hardware platforms are expected to emerge to answer to the new…

Journal of Applied Physics, 2018, 124 (15), pp.151902. ⟨10.1063/1.5042419⟩. ⟨hal-02133792⟩

Article dans une revue

Design of a thin-plate based tunable high-quality narrow passband filter for elastic transverse waves propagate in metals

J. Zhang, L. H. Zeng, C. L. Hu, W. S. Yan, Yan Pennec, N. Hu

For the elastic SV (transverse) waves in metals, a high-quality narrow passband filter that consists of aligned parallel thin plates with small gaps is designed. In order to obtain a good performance, the thin plates should be constituted by materials with a smaller mass density and Young’s modulus…

AIP Advances, 2018, 8 (3), pp.035323. ⟨10.1063/1.5023517⟩. ⟨hal-03185617⟩

Article dans une revue

An extension of the RiMAX multipath estimation algorithm for ultra-wideband channel modeling

Brecht Hanssens, Emmeric Tanghe, Davy Gaillot, M. Lienard, Claude Oestges, David Plets, Luc Martens, Wout Joseph

This work presents an extension of the high-resolution RiMAX multipath estimation algorithm, enabling the analysis of frequency-dependent propagation parameters for ultra-wideband (UWB) channel modeling. Since RiMAX is a narrowband algorithm, it does not account for the frequency-dependency of the…

EURASIP Journal on Wireless Communications and Networking, 2018, 2018 (1), pp.164. ⟨10.1186/s13638-018-1177-3⟩. ⟨hal-03185604⟩

Communication dans un congrès

Effective properties of metamaterials using inverse methods

Laetitia Roux, Christian Audoly, Anne-Christine Hladky, Nicole Kessissoglou

Metamaterials can be engineered for noise and vibration control due to their ability to manipulate waves in band gaps and due to local resonance effects. Metamaterials are often characterised in terms of effective parameters derived from an equivalent homogeneous medium. This work compares two…

Annual Conference of the Australian Acoustical Society, ACOUSTICS 2018, Nov 2018, Adelaide, Australia. 377-378, paper 73. ⟨hal-03557503⟩

Communication dans un congrès

MIMO in tunnel: impact of polarization and array orientation on the channel characteristics

Frédéric Challita, Pierre Laly, M. Lienard, Davy Gaillot, Pierre Degauque, Jose-Maria Molina-Garcia-Pardo, Wout Joseph

Polarimetric characteristics of the propagation channel in a straight tunnel and in a frequency band around 1.3 GHz, are deduced from measurements using a real-time MIMO channel sounder. Emphasis is on the cross-polarization discrimination factor and, for a MIMO configuration, on the correlation…

6th IEEE Radio and Antenna Days of the Indian Ocean, RADIO 2018, Oct 2018, Mauritius, Mauritius. pp.100-101, ⟨10.23919/RADIO.2018.8572376⟩. ⟨hal-03346247⟩

Article dans une revue

An indoor variance-based localization technique utilizing the UWB estimation of geometrical propagation parameters

Brecht Hanssens, David Plets, Emmeric Tanghe, Claude Oestges, Davy Gaillot, M. Lienard, Taoyong Li, Heidi Steendam, Luc Martens, Wout Joseph

A novel localization framework is presented based on Ultra-Wideband (UWB) channel sounding, employing a triangulation method using the geometrical properties of propagation paths, such as time-delay of arrival, angle of departure, angle of arrival, and their estimated variances. In order to extract…

IEEE Transactions on Antennas and Propagation, 2018, 66 (5), pp.2522-2533. ⟨10.1109/TAP.2018.2810340⟩. ⟨hal-03185605⟩