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Affichage de 5081 à 5090 sur 16170

Article dans une revue

Impact of unintentional oxygen doping on organic photodetectors

Julie Euvrard, Amelie Revaux, Alexandra Cantarano, Stephanie Jacob, Antoine Kahn, Dominique Vuillaume

Oxygen plasma is a widely used treatment to change the surface properties of organic layers. This treatment is particularly interesting to enable the deposition from solution of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) on top of the active layer of organic solar cells or...

Organic Electronics, 2018, 54, pp.64-71. ⟨10.1016/j.orgel.2017.12.008⟩. ⟨hal-03183490⟩

Article dans une revue

Multimodal microscopy test standard for scanning microwave, electron, force and optical microscopy

Olaf C. Haenssler, M. F. Wieghaus, A. Kostopoulos, G. Doundoulakis, E. Aperathitis, S. Fatikow, G. Kiriakidis

We report on measurement results of a test standard suitable for different microscopic modalities. These findings were obtained by a multimodal hybrid microscope, which requires various calibration methods, also in terms of its further use as a tool in a nanorobotic environment. A Scanning Probe...

Journal of Micro-Bio Robotics, 2018, 14 (3-4), pp.51-57. ⟨10.1007/s12213-018-0108-z⟩. ⟨hal-03183503⟩

Article dans une revue

Extrinsic capacitance extraction for GaAs and GaN FETs from low to high temperatures

Mohammad A. Alim, Ali A. Rezazadeh, Christophe Gaquière, Giovanni Crupi

The main aim of this article is to present an experimental analysis of the thermal influence on the positive derivatives of the real parts of impedance parameters against frequency (PDRZ) for microwave GaN and GaAs based HEMTs. The PDRZ effect is investigated with respect to temperature by both...

Semiconductor Science and Technology, 2018, 33 (8), ⟨10.1088/1361-6641/aacd56⟩. ⟨hal-03183491⟩

Article dans une revue

Graphene FETs Based on High Resolution Nanoribbons for HF Low Power Applications

David Mele, Sarah Mehdhbi, Dalal Fadil, Wei Wei, Abdelkarim Ouerghi, Sylvie Lepilliet, Henri Happy, Emiliano Pallecchi

In this paper we present high frequency field effect transistors based on graphene nanoribbons arrays (GNRFETs). The nanoribbons serve as a channel for the transistors and are fabricated with a process based on e-beam lithography and dry etching of high mobility hydrogen intercalated epitaxial...

Electronic Materials Letters, 2018, 14 (2), pp.133-138. ⟨10.1007/s13391-018-0038-x⟩. ⟨hal-03183508⟩

Article dans une revue

GaN-Based Laser Wireless Power Transfer System

Carlo de Santi, Matteo Meneghini, Alessandro Caria, Ezgi Dogmus, Malek Zegaoui, F Medjdoub, Boris Kalinic, Tiziana Cesca, Gaudenzio Meneghesso, Enrico Zanoni

The aim of this work is to present a potential application of gallium nitride-based optoelectronic devices. By using a laser diode and a photodetector, we designed and demonstrated a free-space compact and lightweight wireless power transfer system, whose efficiency is limited by the efficiency of...

Materials, 2018, 11 (1), pp.153. ⟨10.3390/ma11010153⟩. ⟨hal-02356738⟩

Article dans une revue

Evidence of optically induced degradation in gallium nitride optoelectronic devices

Carlo de Santi, Alessandro Caria, Nicola Renso, Ezgi Dogmus, Malek Zegaoui, F Medjdoub, Gaudenzio Meneghesso, Enrico Zanoni, Matteo Meneghini

We provide experimental evidence that gallium-nitride-based optoelectronic devices can be affected by a photon-driven degradation mechanism unrelated to catastrophic optical damage. Any role of current in such degradation is excluded by stress tests under laser irradiation in the open-circuit...

Applied Physics Express, 2018, 11 (11), pp.111002. ⟨10.7567/APEX.11.111002⟩. ⟨hal-02356737⟩

Communication dans un congrès

Detection of organic crystallites in ice using terahertz time-domain spectroscopy

Sergey I. Mitryukovskiy, Jean-Francois Lampin, Romain Peretti

We report on the detection of a narrow absorption signature of organic crystallites (alpha-lactose monohydrate) in ice using terahertz time-domain spectroscopy.

2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz 2018), Sep 2018, Nagoya, Japan. paper Th-P1-R1-5, 2 p., ⟨10.1109/IRMMW-THz.2018.8509844⟩. ⟨hal-02334951⟩

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⟩