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Affichage de 7381 à 7390 sur 16474

Article dans une revue

Magneto-transport subband spectroscopy in InAs nanowires

Florian Vigneau, Vladimir Prudkovskiy, Ivan Duchemin, Walter Escoffier, Philippe Caroff, Yann-Michel Niquet, Renaud Leturcq, Michel Goiran, Bertrand Raquet

We report on magnetotransport measurements in InAs nanowires under a large magnetic field (up to 55 T), providing a spectroscopy of the one-dimensional electronic band structure. Large modulations of the conductance mediated by a control of the Fermi energy reveal the Landau fragmentation, carrying…

Physical Review Letters, 2014, 112, 076801, 5 p. ⟨10.1103/PhysRevLett.112.076801⟩. ⟨hal-00959896⟩

Article dans une revue

All optical method for investigation of spin and charge transport in semiconductors : combination of spatially and time-resolved luminescence

Fabian Cadiz, Philippe Barate, D. Paget, Denis S Grebenkov, J.P. Korb, A.C.H. Rowe, Thierry Amand, S. Arscott, Emilien Peytavit

A new approach is demonstrated for investigating charge and spin diffusion as well as surface and bulk recombination in unpassivated doped semiconductors. This approach consists in using two complementary, conceptually related, techniques, which are time-resolved photoluminescence (TRPL) and…

Journal of Applied Physics, 2014, 116 (2), pp.023711. ⟨10.1063/1.4889799⟩. ⟨hal-01024991⟩

Article dans une revue

Two types of MEMS-based oscillating AFM probes

Zhuang Xiong, Estelle Mairiaux, Benjamin Walter, Marc Faucher, Lionel Buchaillot, Bernard Legrand

Most of the commercial Atomic Force Microscope ( AFM) oscillating probes are based on micro-scale cantilevers enabling measurement with pico-Newton force resolution in vacuum. However, the cantilever probes suffer from a degradation of both resonance frequency and quality factor when operating in…

Journal of Chinese Electron Microscopy Society , 2014, 2, pp.137-141. ⟨hal-01960910⟩

Communication dans un congrès

Mécanisme de transport dans des jauges de contraintes à nanoparticules colloïdales

Moussa Biaye, Heinrich Diesinger, Nicolas Decorde, Jérémie Grisolia, Benoit Viallet, Laurence Ressier, Thierry Melin

Les écrans tactiles envahissent notre quotidien (smartphones, tablettes ...). Dans ce travail, l'objectif est de caractériser des surfaces tactiles résistives basées sur le transport à travers des couches autoassemblées de nanoparticules (NPs) métalliques. Il s'agit d'utiliser la…

17ème Forum des Microscopies à Sonde Locale, 2014, Montauban, France. session 10, papier 36, 96-97. ⟨hal-00974549⟩

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

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⟩

Article dans une revue

Demonstrating kHz frequency actuation for conducting polymer microactuators

Ali Maziz, Cedric Plesse, Caroline Soyer, Claude Chevrot, Dominique Teyssié, Eric Cattan, Frederic Vidal

This paper reports results on ionic EAP micromuscles converting electrical into micromechanical response in open-air. Translation of small ion motion into large deformation in bending microactuator and its amplifi cation by fundamental resonant frequency are used as tools to demonstrate that small…

Advanced Functional Materials, 2014, 24, pp.4851-4859. ⟨10.1002/adfm.201400373⟩. ⟨hal-01058060⟩