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Affichage de 7361 à 7370 sur 16455

Article dans une revue

Graphene nanotransistors for RF charge detection

E. Pallecchi, Q. Wilmart, A.C. Betz, S.H. Jhang, G. Fève, J.M. Berroir, Sylvie Lepilliet, Gilles Dambrine, H. Happy, B. Plaçais

We have studied the static and dynamical properties of a graphene microwave nanotransistor to be used as sensitive fast charge detectors. The channel consists of exfoliated graphene on SiO2 with a 120 nm long, 900-1500 nm wide top-gate deposited on 5 nm AlOx dielectric. The scattering parameters…

Journal of Physics D: Applied Physics, 2014, 47, 094004, 5 p. ⟨10.1088/0022-3727/47/9/094004⟩. ⟨hal-00946703⟩

Communication dans un congrès

Modeling of GaN Schottky diodes

Chong Jin, Etienne Okada, Marc Faucher, Damien Ducatteau, Mohamed Zaknoune, Dimitris Pavlidis

GaN-based Schottky diodes for microwave, millimeter-wave power applications were characterized and modeled. The modeling technique employed dummy structure to derive parasitic elements introduced by access pads. Intrinsic elements were extracted by fitting junction capacitance for fixed grading…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 3 p. ⟨hal-01020469⟩

Communication dans un congrès

Robust receiver in impulsive noise

Xin Yan, Laurent Clavier, Ido Nevat, Gareth W. Peters, François Septier

Impulsive interference is a strong limitation in ultra wide band systems or ad hoc networks. Using stochastic geometry without considering a guard zone around the receiver leads to an alpha-stable distribution for this interference. Based on this assumption, it is possible to design efficient…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 4 p. ⟨hal-01020280⟩

Communication dans un congrès

Atomic switch : synaptic functionalities and integration strategies

Selina La Barbera, David Guérin, Dominique Vuillaume, F. Alibart

Nowadays, neuro-inspired computing has generated a lot of interest and seems to be a promising candidate to complement and to provide enhanced performances and new functionalities to the existing CMOS/Von Neumann processor. Engineering of memristive nano devices with specific functionalities for…

17èmes Journées Nationales du Réseau Doctoral en Micro-Nanoélectronique, JNRDM 2014, 2014, Villeneuve d'Ascq, France. 4 p. ⟨hal-01020271⟩

Article dans une revue

Optical properties of carbon nanotube thin films in subterahertz frequency regime

Sujitha Puthukodan, Ehsan Dadrasnia, V.K.T. Vinod, Horacio Lamela Rivera, Guillaume Ducournau, Jean-Francois Lampin

Multiwalled carbon nanotube (MWCNT) thin films deposited on fused quartz substrates are characterized by continuous wave subterahertz free space technique using a vector network analyzer (VNA). The scattering (S) parameters are measured by a VNA in the frequency range of 220-325 GHz (G-band) and…

Microwave and Optical Technology Letters, 2014, 56, pp.1895-1898. ⟨10.1002/mop.28477⟩. ⟨hal-01005132⟩

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⟩

Communication dans un congrès

Scanning tunneling microscopy of GaAs/GaAsSb nanowires

Adrian Díaz Álvarez, Pierre Capiod, Maxime Berthe, Tao Xu, Jean-Philippe Nys, Isabelle Lefebvre, Philippe Caroff, Philipp Ebert, B. Grandidier

Understanding surface structure and surface composition is of particular importance for semiconductor nanowire applications, since they might strongly contribute to the electrical, optical and thermal properties of the Nanowires. A prototypical material is GaAs, where polytype inclusions consisting…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium E - Defect-induced effects in nanomaterials, 2014, Lille, France. ⟨hal-00964089⟩

Communication dans un congrès

Acousto-optical tunable transmissive grating beam splitter

Anthony Dieulangard, Jean-Claude Kastelik, Samuel Dupont, Joseph Gazalet

We present a tunable transmissive grating beam splitter for multiple laser line separation based on acousto-optic interaction in tellurium dioxide. Acousto-optic devices are well known for light modulation, frequency shifting, filtration or deflection. For a deflector, the incident light beam is…

SPIE Photonics West, OPTO 2014, Conference 8982 - Optical Components and Materials XI, 2014, San Francisco, CA, United States. 89821H, 8 p., ⟨10.1117/12.2036327⟩. ⟨hal-00964449⟩

Communication dans un congrès

PbS quantum dots and ZnO nanowires for 3rd generation solar cells

Basma El Zein, El Hadj Dogheche, Enrico Traversa

Semiconductor nanostructures with low dimensions such as quantum dots and nanowires are considered as important building blocks for the third generation solar cells, due to their useful optical and electrical properties. Quantum dots and nanowires hold promising potency to improve the performance…

European Materials Research Society Spring Meeting, E-MRS Spring 2014, Symposium Y - Advanced materials and characterization techniques for solar cells II, 2014, Lille, France. ⟨hal-00964524⟩

Article dans une revue

Mueller matrix optical and magneto-optical characterization of Bi-substituted gadolinium iron garnet for application in magnetoplasmonic structures

L. Halagacka, K. Postava, Mathias Vanwolleghem, Francois Vaurette, Jamal Ben Youssef, B. Dagens, J. Pistora

A ferromagnetic garnet, used as a magneto-optical (MO) material in magneto-photonic and magneto-plasmonic structures, is characterized. We present a general procedure to determine optical and magneto-optical functions of the magneto-optic garnet by using Mueller matrix ellipsometry. In the first…

Optical Materials Express, 2014, 4 (9), pp.1903-1919. ⟨10.1364/OME.4.001903⟩. ⟨hal-01058152⟩