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Affichage de 5201 à 5210 sur 16232

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⟩

Chapitre d'ouvrage

Chapter 2 - Phonon monomode circuits

El Houssaine El Boudouti, Abdellatif Akjouj, L. Dobrzynski, Bahram Djafari-Rouhani, Housni Al-Wahsh, Gaëtan Lévêque, Yan Pennec

In this chapter, we discuss the vibrational properties of phononic circuits that can be described in the framework of discrete or continuous models. In the case of discrete media, we use the phonon discrete model within the Green’s function method described in Chapter 1 and give the surface…

Phononics: interface transmission tutorial book series, Elsevier, pp.19-78, 2018, ISBN 978-0-12-809948-3 ; e-ISBN 978-0-12-809931-5. ⟨10.1016/B978-0-12-809948-3.00002-8⟩. ⟨hal-03356293⟩

Article dans une revue

Numerical emulation of thru-reflection-line calibration for the de-embedding of surface acoustic wave devices

D. Mencarelli, Bahram Djafari-Rouhani, Yan Pennec, A. Pitanti, S. Zanotto, M. Stocchi, L. Pierantoni

In this contribution, a rigorous numerical calibration is proposed to characterize the excitation of propagating mechanical waves by interdigitated transducers (IDTs). The transition from IDT terminals to phonon waveguides is modeled by means of a general circuit representation that makes use of…

Scientific Reports, 2018, 8 (1), pp.9256. ⟨10.1038/s41598-018-27511-0⟩. ⟨hal-03185610⟩

Communication dans un congrès

Highly Sensitive Surface Acoustic Wave Magnetic Field Sensor Using Multilayered TbCo2/FeCo Thin Film

Aurelien Mazzamurro, Abdelkrim Talbi, Yannick Dusch, Omar Elmazria, Philippe Pernod, Olivier Bou Matar, Nicolas Tiercelin

Over the last decades, the use of Surface Acoustic Waves (SAW) has emerged as a promising technology in many applications such as filters, signal processing but also sensors. We report the fabrication and the characterization of a SAW delay line magnetic field sensor using uniaxial multi-layered…

32nd Eurosensors Conference, EUROSENSORS 2018, Sep 2018, Graz, Austria. pp.902, ⟨10.3390/proceedings2130902⟩. ⟨hal-02318300⟩

Communication dans un congrès

Investigating the potential of SiGe Diode in BiCMOS 55nm for power detection and datacom applications at 300 GHz

Joao Carlos Azevedo Goncalves, Issa Alaji, Daniel Gloria, Sylvie Lepilliet, Francois Danneville, Christophe Gaquière, Guillaume Ducournau

This paper describes millimeter wave (mmW) on-wafer continues wave (CW) power detection using dedicated high frequency diode junction, integrated on SiGe BiCMOS 55 nm technology from STMicroelectronics. This extraction was performed for two test structures configurations in order to evaluate the…

43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), Sep 2018, Nagoya, Japan. ⟨10.1109/IRMMW-THz.2018.8510217⟩. ⟨hal-03272698⟩

Communication dans un congrès

Adaptive Channel estimation technique for ITS-G5 inter- vehicular communication systems

Aymen Sassi, Yassin El Hillali, Atika Rivenq

In recent years, vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication systems, known as V2X technologies, have been the interest of several research works in road safety and traffic ergonomics. The evaluation of their performance is a substantial step before their probable…

30th International Conference on Microelectronics, ICM 2018, Dec 2018, Sousse, Tunisia. pp.76-79, ⟨10.1109/ICM.2018.8704023⟩. ⟨hal-03528675⟩

Article dans une revue

Continuous-wave infrared optical gain and amplified spontaneous emission at ultralow threshold by colloidal HgTe quantum dots

Pieter Geiregat, Arjan J Houtepen, Laxmi Kishore Sagar, Ivan Infante, Felipe Zapata, Valeriia Grigel, Guy Allan, Christophe Delerue, Dries van Thourhout, Zeger Hens

Abstract Colloidal quantum dots (QDs) raise more and more interest as solution-processable and tunable optical gain materials. However, especially for infrared active QDs, optical gain remains inefficient. Since stimulated emission involves multifold degenerate band-edge states, population…

Nature Materials, 2018, 17 (1), pp.35-42. ⟨10.1038/nmat5000⟩. ⟨hal-02133329⟩

Article dans une revue

Contribution of the shear wave ultrasonic reflectometry to the stickiness measurements

Nicolas Collier, Pascal Debreyne, Guillaume Delaplace, Bowei Chen, Dorothée Debavelaere-Callens, Pierre Campistron, Bertrand Nongaillard

Today, non-invasive quantification of the adhesion of a deposit to a surface is always a challenge and, unfortunately, few tools are available in this area. This is an obstacle, in several industrial processes, to the identification of conditions limiting the fouling and to the establishment of eco…

Ultrasonics, 2018, 89, pp.187-194. ⟨10.1016/j.ultras.2018.05.001⟩. ⟨hal-02621700⟩

Article dans une revue

Developing a MEMS device with built-in microfluidics for biophysical single cell characterization

Yuki Takayama, Grégoire Perret, Momoko Kumemura, Manabu Ataka, Samuel Meignan, Stanislav Karsten, Hiroyuki Fujita, Dominique Collard, Chann Lagadec, Mehmet Tarhan

This study combines the high-throughput capabilities of microfluidics with the sensitive measurements of microelectromechanical systems (MEMS) technology to perform biophysical characterization of circulating cells for diagnostic purposes. The proposed device includes a built-in microchannel that…

Micromachines, 2018, 9 (6), pp.275. ⟨10.3390/mi9060275⟩. ⟨hal-03185615⟩

Communication dans un congrès

Analytical model for the energy harvesting of a spherical sensor from ambient vibrations

Daher Diab, Fabrice Lefebvre, Georges Nassar, Nikolay Smagin, Adnan Naja, Fawaz El Omar

In this work an analytical model for the energy harvesting of an acoustic spherical sensor has been developed in the context to make it autonomous. Our spherical sensor is composed of two half-spheres of Plexiglas and a piezoelectric ring of PZ26 that can be used as exciter or sensor. For the…

1st International Conference on Energy, Power, Petroleum and Petrochemical Engineering, E3PE 2017, Apr 2017, Beirut, Lebanon. pp.62-66, ⟨10.1051/matecconf/201817102006⟩. ⟨hal-03563959⟩