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Affichage de 1981 à 1990 sur 16064

Article dans une revue

Analyzing the Mechanism of Zinc Oxide Nanowires Bending and Bundling Induced by Electron Beam under Scanning Electron Microscope Using Numerical and Simulation Analysis

Basma El Zein, Ali Elrashidi, El Hadj Dogheche, Ghassan Jabbour

The bending effect of self-catalyst zinc oxide nanowires on a photoconducting behavior has been investigated by in-situ scanning electron microscope method and interpreted by analytical modeling. Zinc oxide NWs tend to incline due to geometric instability and because of the piezoelectric properties…

Materials, 2022, 15 (15), pp.5358. ⟨10.3390/ma15155358⟩. ⟨hal-03752250⟩

Article dans une revue

Investigation of luminescence centers inside InGaN/GaN multiple quantum well over a wide range of temperature and injection currents

Neslihan Ayarcı Kuruoğlu, Orhan Özdemir, Kutsal Bozkurt, Hanife Baş, Bandar Alshehri, Karim Dogheche, El Hadj Dogheche

InGaN/GaN multiple quantum well-based light-emitting diode LEDs were investigated over a wide range of injection currents (0.04 mA–0.1 A) and temperature (80–370 K)-dependent electroluminescence EL measurements. Two centers were identified for blue luminescence peaking at 2.9 eV and 3.0 eV, denoted…

Journal of Materials Science: Materials in Electronics, 2022, 33, pp.19151-19159. ⟨10.1007/s10854-022-08752-2⟩. ⟨hal-03741985⟩

Article dans une revue

Comprehensive model for ideal reverse leakage current components in Schottky barrier diodes tested in GaN-on-SiC samples

B. Orfao, G. Di Gioia, B. Vasallo, S. Pérez, J. Mateos, Yannick Roelens, E. Frayssinet, Y. Cordier, M. Zaknoune, T. González

A model to predict the ideal reverse leakage currents in Schottky barrier diodes, namely, thermionic emission and tunneling components, has been developed and tested by means of current–voltage–temperature measurements in GaN-on-SiC devices. The model addresses both current components and both…

Journal of Applied Physics, 2022, 132 (4), pp.044502. ⟨10.1063/5.0100426⟩. ⟨hal-03741441⟩

Article dans une revue

Growth and design strategies of organic dendritic networks

Giuseppe Ciccone, Matteo Cucchi, Yanfei Gao, Ankush Kumar, Lennart Maximilian Seifert, Anton Weissbach, Hsin Tseng, Hans Kleemann, Fabien Alibart, Karl Leo

Abstract A new paradigm of electronic devices with bio-inspired features is aiming to mimic the brain’s fundamental mechanisms to achieve recognition of very complex patterns and more efficient computational tasks. Networks of electropolymerized dendritic fibers are attracting much interest because…

Discover Materials, 2022, 2 (1), pp.7. ⟨10.1007/s43939-022-00028-0⟩. ⟨hal-04656305⟩

Article dans une revue

Imaging of THz photonic modes by scattering scanning near-field optical microscopy

L. Thomas, Theo Hannotte, Cristiane N. Santos, Benjamin Walter, Melanie Lavancier, Sophie Eliet, Marc Faucher, Jean-Francois Lampin, Romain Peretti

We investigated the near-field distribution associated to the photonic mode of terahertz photonic micro-resonators by scattering scanning near-field optical microscopy. Probing individual THz microresonators concentrating electric field is important for high-sensitivity chemical and biochemical…

ACS Applied Materials & Interfaces, 2022, 14 (28), pp.32608-32617. ⟨10.1021/acsami.2c01871⟩. ⟨hal-03608482⟩

Communication dans un congrès

Theoretical Polarimetric Channel Characterization of Road Tunnels in Presence of Vehicles at 5.9 GHz

Jose-Maria Molina-Garcia-Pardo, Esteban Egea-Lopez, Martine Lienard, Pierre Degauque

Vehicular communication is a hot topic for developing solutions for automatic guidance, safety-related problems, and end-user applications. The dedicated frequency band in Europe is around 5.9 GHz. Characterization of the communication channel is thus deeply studied especially for the urban and…

2022 26th International Conference on Circuits, Systems, Communications and Computers (CSCC), Jul 2022, Crete, Greece. pp.280-285, ⟨10.1109/CSCC55931.2022.00054⟩. ⟨hal-03997408⟩

Communication dans un congrès

Biosensor based on Phononic Crystals Supporting Bound States in the Continuum and Fano resonances

I. Quotane, M. Amrani, C. Ghouila-Houri, E. El Boudouti, L. Krutyanskiy, Bogdan Piwakowski, Philippe Pernod, Abdelkrim Talbi, Bahram Djafari-Rouhani

We study a one-dimensional phononic crystal (1D-PC) that provides a new biosensor platform based on bound states in the continuum (BICs) and Fano resonances. The structure consists of a triple solid-liquid-solid layer immersed in water, where epoxy is used as the solid layers and a mixture of water…

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369163⟩

Communication dans un congrès

Triangular resonators in topological valley photonic crystals

Gaëtan Lévêque, A. Martínez, Yan Pennec

In that work, we investigate numerically photonic topological insulators based on the valley Hall effect. Linear waveguides are coupled to triangular cavities, and a semi-analytical model is used to evidence the relation between a weak back-scattering along light propagation and the shape of the…

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369166⟩

Communication dans un congrès

Acoustic waves focusing with elliptic pillars type metasurface

Laurent Carpentier, Yan Pennec, Bahram Djafari-Rouhani

We numerically investigate the focusing properties of an acoustic metasurface consisting of a line of pillars of elliptic shape on a thin plate. We report on the influence of the ellipticity parameter on both monopolar compressional and dipolar bending modes of the pillars. We show that a line of…

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369116⟩

Communication dans un congrès

Spectral flow of a localized elastic mode

M. Miniaci, F. Allein, R. K Pal

The introduction of structural defects in otherwise periodic media is well known to grant exceptional space control and localization of waves in various physical fields, including elasticity. We theoretically predict and experimentally demonstrate the spectral flow of a localized mode across a bulk…

12th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META22, Jul 2022, Torremolinos, Spain. ⟨hal-04369179⟩