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Affichage de 6981 à 6990 sur 16434

Article dans une revue

Interferometric technique for scanning near-field microwave microscopy applications

Hind Bakli, Kamel Haddadi, Tuami Lasri

An interferometric technique for scanning near-field microscopy applications is proposed. The method is based on the association of a vector network analyzer, an evanescent microwave coaxial probe and a precise interferometer built up with a power divider, a phase-shifter, and an attenuator.…

IEEE Transactions on Instrumentation and Measurement, 2014, 63, pp.1281-1286. ⟨10.1109/TIM.2013.2296416⟩. ⟨hal-00980043⟩

Article dans une revue

Optical properties of gallium nitride heterostructures grown on silicon for waveguiding application

Irma Saraswati, Arnaud Stolz, S. Ko, El Hadj Dogheche, Nji Raden Poespawati, Retno Wigajatri, Didier Decoster

Gallium nitride (GaN) on silicon (Si) is governed by the possibility to use this family of semiconductor for novel optoelectronic devices. GaN layers are deposited by MOCVD on silicon Si (111) using AlGaN buffer layer. We have studied the microstructure quality of the films. From SEM, TEM and AFM…

Advanced Materials Research, 2014, 980, pp.41-45. ⟨10.4028/www.scientific.net/AMR.980.41⟩. ⟨hal-01020484⟩

Communication dans un congrès

Phononic crystals patterning by e-beam lithography "dots on the fly" methodology for integration into thermoelectric energy converters

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

A phononic engineered pattern is conceptualized and realized to hinder the phonons propagation and reduce the lattice thermal conductivity. The pattern fabrication methodology is shown and the procedure of integration on suspended membrane for thermal conductivity characterization is depicted. The…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 3 p. ⟨hal-01020281⟩

Communication dans un congrès

Broadband sound shielding of Lamb waves through a periodic array of junctions

R.P. Moiseyenko, Yan Pennec, R. Marchal, B. Bonello, Bahram Djafari-Rouhani

We study theoretically sub-wavelength physical phenomena such as resonant transmission and broadband sound shielding for Lamb waves propagating in an acoustic metamaterial made of a thin plate drilled with one or two row(s) of rectangular holes. One of the main results is the demonstration of a…

2014 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, METAMATERIALS 2014, Aug 2014, Copenhagen, Denmark. pp.100-102, ⟨10.1109/MetaMaterials.2014.6948609⟩. ⟨hal-03508189⟩

Communication dans un congrès

Experimental investigation of the characteristics of the electromagnetic reverberation in the UWB bands

Aliou Bamba, Wout Joseph, Emmeric Tanghe, Luc Martens, Davy Gaillot, M. Lienard, Jose-Maria Molina-Garcia-Pardo, Maria-Teresa Martinez-Ingles

The electromagnetic reverberation time characteristics are investigated at UltraWide Band (UWB) frequencies, i.e., from 2 to 10 GHz. The reverberation time is bandwidth independent and decreases as the frequency increases. Besides, the reverberation ratio - the contribution of the diffuse fields in…

2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, AP-S/URSI 2014, Jul 2014, Memphis, TN, United States. pp.1181-1182, ⟨10.1109/APS.2014.6904917⟩. ⟨hal-03346231⟩

Article dans une revue

Synthesis and electrical conductivity of multilayer silicene

Patrick Vogt, Pierre Capiod, Maxime Berthe, Andrea Resta, Paola de Padova, Thomas Brühne, Guy Le Lay, B. Grandidier

The epitaxial growth and the electrical resistance of multilayer silicene on the Ag(111) surface has been investigated. We show that the atomic structure of the first silicene layer differs from the next layers and that the adsorption of Si induces the formation of extended silicene terraces…

Applied Physics Letters, 2014, 104 (2), 021602, 5 p. ⟨10.1063/1.4861857⟩. ⟨hal-00934419⟩

Article dans une revue

Optomechanic interaction in a corrugated phoxonic nanobeam cavity

Mourad Oudich, Said El-Jallal, Yan Pennec, Bahram Djafari-Rouhani, Jordi Gomis-Bresco, Daniel Navarro-Urrios, Clivia M. Sotomayor Torres, Alejandro Martínez, Abdelkader Makhoute

The interaction between phonons and photons is investigated theoretically in a phoxonic cavity inside a corrugated nanobeam waveguide presenting band gaps for both electromagnetic and elastic waves. The structure is made by drilling periodic holes on a silicon nanobeam with lateral periodic stubs…

Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89, 245122, 9 p. ⟨10.1103/PhysRevB.89.245122⟩. ⟨hal-01015199⟩

Communication dans un congrès

Transport properties of CdSe nanocrystal superlattice

Pierre Capiod, Maxime Berthe, B. Grandidier, Wiel Evers, Daniel Vanmaekelbergh

Two-dimensional materials exhibit exotic electronic properties and high specific surface areas that make them unique to investigate novel physical phenomena. In addition, their two-dimensional geometry is directly compatible with established design and processing approaches from the semiconductor…

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-00966150⟩

Communication dans un congrès

Silicon nanotweezers inside liquid for the real time characterization of DNA degradation under radiotherapy treatment

Grégoire Perret, T. Lacornerie, V. Kumemura, N. Lafitte, H. Guillou, L. Jalabert, E. Lartigau, T. Fujii, Fabrizio Cleri, H. Fujita, Dominique Collard

Tumor cell killing by γ-ray beams in radiotherapy is currently based on a rather empirical understanding of the basic mechanisms and effectiveness of DNA damage by radiation. On the other hand, the mechanical behavior of DNA, e.g., sequence-sensitivity, elastic vs. plastic response, is well…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium N - Converging technology for nanobio-applications, 2014, Lille, France. ⟨hal-00966166⟩

Article dans une revue

Control of the ionization state of three single donor atoms in silicon

B. Voisin, M. Cobian, X. Jehl, M. Vinet, Yann-Michel Niquet, Christophe Delerue, Silvano de Franceschi, M. Sanquer

By varying the front-gate and the substrate voltages in a short silicon-on-insulator trigate field-effect transistor, we control the ionization state of three arsenic donors. We obtain good quantitative agreement between three-dimensional electrostatic simulations and experiment for the control…

Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2014, 89, pp.161404. ⟨10.1103/PhysRevB.89.161404⟩. ⟨hal-00981141⟩