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Article dans une revue

Tilt-related alignment issues in miniature micromechanical on-wafer electrical probes composed of multiple flexible microcantilevers

Steve Arscott

Abstract Some new issues concerning the contacting and positioning of small electrical microelectromechanical systems (MEMS) probes based on multiple, flexible microcantilevers are presented here. A tilt error, associated with the lateral probe roll, means that contact touchdown occurs sequentially…

Engineering Research Express, 2024, 6 (1), ⟨10.1088/2631-8695/ad2ccc⟩. ⟨hal-04485030⟩

Article dans une revue

A G-band Packaged Amplified Noise Source using SiGe BiCMOS 55 nm Technology

Victor Fiorese, Joao Carlos Azevedo Goncalves, Simon Bouvot, Sylvie Lepilliet, Daniel Gloria, Guillaume Ducournau, Christophe Gaquière, Emmanuel Dubois

This article introduces the first BiCMOS SiGe technology based packaged noise source (NS) operating in G-band (140-220 GHz). An amplified PN junction diode has been packaged and biased in avalanche mode to generate Excess Noise Ratios (ENRav) of approximately 25 dB between 140 and 170 GHz at…

IEEE Transactions on Microwave Theory and Techniques, 2024, 72 (3), pp.1775 - 1789. ⟨10.1109/TMTT.2023.3311476⟩. ⟨hal-04192337v2⟩

Article dans une revue

Highlighting the role of 3C–SiC in the performance optimization of (Al,Ga)N‒based High‒Electron mobility transistors

Micka Bah, Daniel Alquier, Marie Lesecq, Nicolas Defrance, Damien Valente, Thi Huong Ngo, Eric Frayssinet, Marc Portail, Jean-Claude de Jaeger, Yvon Cordier

AlN nucleation layer is the key issue for the performance of GaN high frequency telecommunication and power switching systems fabricated after heteroepitaxy on Silicon or Silicon Carbide. In this work, we demonstrate and explain both the low level and the origin of propagation losses in GaN/3C–SiC/…

Materials Science in Semiconductor Processing, 2024, 171, pp.107977. ⟨10.1016/j.mssp.2023.107977⟩. ⟨hal-04378667⟩

Article dans une revue

Linking Cause and Effect: Nanoscale Vibrational Spectroscopy of Space Weathering from Asteroid Ryugu

Sylvain Laforet, Corentin Le Guillou, Francisco de la Peña, Michael Walls, Luiz H.G. Tizei, Maya Marinova, Pierre Beck, van T. H. Phan, Damien Jacob, Bahae-Eddine Mouloud, Daniel Hallatt, Mario Pelaez-Fernandez, Jean-Christophe Viennet, David Troadec, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Hisayoshi Yurimoto, Hugues Leroux

Abstract Airless bodies are subjected to space-weathering effects that modify the first few microns of their surface. Therefore, understanding their impact on the optical properties of asteroids is key to the interpretation of their color variability and infrared reflectance observations. The…, Les corps dépourvus d'atmosphère tels que les astéroïdes sont soumis à des effets d’altération spatiale qui modifient les premiers microns de leur surface. Par conséquent, la compréhension de leur impact sur les propriétés optiques de ces astéroïdes est essentielle pour l’interprétation de…

The Astrophysical Journal Letters, 2024, The Astrophysical Journal Letters, 963 (2), pp.L45. ⟨10.3847/2041-8213/ad2b65⟩. ⟨hal-04505901⟩

Article dans une revue

Generation and detection of manipulated multimodal audiovisual content: Advances, trends and open challenges

Helena Liz-López, Mamadou Keita, Abdelmalik Taleb-Ahmed, Abdenour Hadid, Javier Huertas-Tato, David Camacho

Generative deep learning techniques have invaded the public discourse recently. Despite the advantages, the applications to disinformation are concerning as the counter-measures advance slowly. As the manipulation of multimedia content becomes easier, faster, and more credible, developing effective…

Information Fusion, 2024, 103, pp.102103. ⟨10.1016/j.inffus.2023.102103⟩. ⟨hal-04281649⟩

Article dans une revue

Control of microstructure and composition of reactively sputtered vanadium nitride thin films based on hysteresis curves and application to microsupercapacitors

Allan Lebreton, Marie-Paule Besland, Pierre-Yves Jouan, Tatiana Signe, Cédric Mannequin, Mireille Richard-Plouet, Maryline Le Granvalet, Christophe Lethien, Thierry Brousse, Jérémy Barbé

Vanadium nitride (VN) thin films were prepared by reactive DC magnetron sputtering of a vanadium target using nitrogen as reactive gas. The structural, morphological, and compositional evolution of these films is described based on hysteresis diagrams plotting the sputtering power versus nitrogen…

Journal of Vacuum Science & Technology A, 2024, 42 (2), pp.023405. ⟨10.1116/5.0177028⟩. ⟨hal-04423908⟩

Article dans une revue

Exceptional points for crack detection in non-Hermitian beams

Yabin Jin, Wenjun Li, Bahram Djafari-Rouhani, Yan Li, Yanxun Xiang

We study exceptional points (EPs) in parity-time (PT) symmetric non-Hermitian beams and explore their applications in crack detection. The EPs are formed by coupling different beam modes under feedback-controlled forces. The variations of the required non-Hermitian coefficient for the achievement…

Journal of Sound and Vibration, 2024, 572, pp.118162. ⟨10.1016/j.jsv.2023.118162⟩. ⟨hal-04372629⟩

Article dans une revue

Electromechanical sensitivity of ZnO thin films at high-pressure regime for SAW strain sensor applications

Fahima Arab, Fares Kanouni, Rafik Serhane, Yan Pennec

This paper employs Density Functional Theory (DFT) to investigate the influence of high hydrostatic pressure on the piezo-elastic properties of ZnO with a specific focus on its repercussions for Surface Acoustic Wave (SAW) devices. Our findings reveal a significant enhancement in the piezoelectric…

Materials Today Communications, 2024, 38, pp.107719. ⟨10.1016/j.mtcomm.2023.107719⟩. ⟨hal-04372459⟩

Article dans une revue

Quantum point-contact sensors: State of the art and prospects

Gennadii Kamarchuk, Olexander Pospelov, Volodymyr Vakula, Eric Faulques

We present generalized information on the new type of universal quantum detectors operating on the basis of Yanson point contacts. The properties and capabilities of quantum point-contact detectors are totally different from those of conventional sensors based on the principle of changing electric…

Sensors and Actuators B: Chemical, 2024, 402, pp.135064. ⟨10.1016/j.snb.2023.135064⟩. ⟨hal-04548686⟩

Article dans une revue

Engineering and optimization of the SPR device ZnO/Ag/WO3/Ni/2D-Nanomaterials highly sensitive for biomedical processing and detection

Mohamed El Barghouti, Fatima Houari, Abdellatif Akjouj, Abdellah Mir

In this paper, we present a detailed study of the effect of WO3 and Ni films in the presence of BP and BlueP-MDC nanomaterial layers on the sensitivity of a surface plasmon resonance (SPR) following the change in refractive index of the detection medium. Our nanostructure is based on the…

Optical Materials, 2024, 149, pp.115019. ⟨10.1016/j.optmat.2024.115019⟩. ⟨hal-04465252⟩