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Affichage de 1071 à 1080 sur 16182

Article dans une revue

A Tight-Binding Model for Illustrating Exciton Confinement in Semiconductor Nanocrystals

Z. Hens, Christophe Delerue

The Brus equation describes the relation between the lowest energy of an electron–hole pair and the size of a semiconductor crystallite. However, taking the strong confinement regime as a starting point, the equation does not cover the transition from weak to strong confinement, the accompanying...

The Journal of Chemical Physics, 2024, 160 (11), pp.114106. ⟨10.1063/5.0192031⟩. ⟨hal-04513566⟩

Article dans une revue

Tunable topologically protected waveguiding in auxetic nonlinear metamaterials

M. Morvaridi, F. Bosia, M. Brun, V.F. Dal Poggetto, A.S. Gliozzi, M. Miniaci, C. Croenne, N.M. Pugno, G. Carta

In this paper, we discuss the possibility of achieving tunable topologically protected edge modes through the application of uniaxial prestrain in an auxetic metamaterial. The proposed structure consists of a thin slab with oriented cuts in a hexagonal lattice, where topologically protected band...

Physical Review Applied, 2024, 21 (3), pp.034024. ⟨10.1103/PhysRevApplied.21.034024⟩. ⟨hal-04526207⟩

Communication dans un congrès

Enabling Low-Power Signature Recognition for the IoT with SLIF neurons

Guillaume Marthe, Claire Goursaud, Laurent Clavier

Energy constraints are still a significant challenge in numerous IoT applications, particularly due to the excessive power consumption of microcontrollers. To overcome this limitation, novel circuit designs have been introduced, with the integration of spiking neurons and analog computing emerging...

EUSIPCO 2024 - 32nd European conference on signal processing, Aug 2024, Lyon, France. pp.1-5. ⟨hal-04788239⟩

Article dans une revue

Optimizing Connectivity: DVB-RCS2 Uplink to GEO Satellites via Optical Wireless Communication

Meryem Romaissa Djellouli, Sid Ahmed Chouakri, Abdelkrim Ghaz, Abdelmalik Taleb-Ahmed

This research focuses on the integration of an opto-satellite system based on Free Space Optical Communication (OWC) within DVB-RCS2 chains, implementing 16-QAM modulation techniques and Optical Time Division Wavelength Multiplexing (OTDMWDM). A co-simulation framework combining the MATLAB and...

Progress In Electromagnetics Research C, 2024, 150, pp.135-144. ⟨10.2528/PIERC24100601⟩. ⟨hal-04839773⟩

Article dans une revue

On the Performance of a Photonic Reconfigurable Electromagnetic Band Gap Antenna Array for 5G Applications

Taha A Elwi, Fatma Taher, Bal S Virdee, Mohammad Alibakhshikenari, Ignacio J Garcia Zuazola, Astrit Krasniqi, Amna Shibib Kamel, Nurhan Türker Tokan, Salahuddin Khan, Naser Ojaroudi Parchin, Patrizia Livreri, Iyad Dayoub, Giovanni Pau, Sonia Aïssa, Ernesto Limiti, Mohamed Fathy Abo Sree

In this paper, a reconfigurable Multiple-Input Multiple-Output (MIMO) antenna array is presented for 5G portable devices. The proposed array consists of four radiating elements and an Elec- tromagnetic Band Gap (EBG) structure. Planar monopole radiating elements are employed in the array with...

IEEE Access, 2024, 12, pp.60849 - 60862. ⟨10.1109/access.2024.3392368⟩. ⟨hal-04569351⟩

Article dans une revue

Immunity to Backscattering of Bulk Waves in Topological Acoustic Superlattices

P A Deymier, Jérome O Vasseur, K. Runge, A. Khanikaev, A. Alù

We herein investigate the scattering of orthogonal counterpropagating waves and one-way propagating bulk waves in discrete acoustic superlattices subjected to a scattering potential applied to one of the superlattice unit cells. We demonstrate theoretically that the orthogonality of...

Crystals, 2024, 14 (4), pp.344. ⟨10.3390/cryst14040344⟩. ⟨hal-04544219⟩

Article dans une revue

FT-IR detection of DMMP on TiO 2 -Modified Porous Silicon Substrates

Warda Raiah, M. Guendouz, Parastesh Pirasteh, Vincent Thomy, Joël Charrier, Yannick Coffinier

In this study, we present a new chemical sensor based on a functionalized porous silicon and sensitive to dimethyl methyl phosphonate (DMMP), a simulant of sarin gas, known as one of the most toxic warfare agents. The porous silicon was prepared by anodising a boron-doped p-Si (100) wafer. A metal...

Materials Today Chemistry, 2024, 42, pp.102363. ⟨10.1016/j.mtchem.2024.102363⟩. ⟨hal-04774473v2⟩

Article dans une revue

Robust Video List Decoding in Error-Prone Transmission Systems Using a Deep Learning Approach

Yujing Zhang, Stéphane Coulombe, François-Xavier Coudoux, Alexis Guichemerre, Patrick Corlay

<div xmlns="http://www.tei-c.org/ns/1.0"><p>This paper introduces a novel deep-learning assisted video list decoding method for error-prone video transmission systems. Unlike traditional list decoding techniques, our proposed system uses a Transformer-based no-reference image...

IEEE Access, 2024, 12, pp.170632 - 170647. ⟨10.1109/access.2024.3501152⟩. ⟨hal-04823340⟩

Article dans une revue

High Capacitance Porous Ruthenium Nitride Films with High Rate Capability for Micro‐Supercapacitors

Khac Huy Dinh, Grace Whang, Marielle Huve, David Troadec, Antoine Barnabé, Bruce Dunn, Pascal Roussel, Christophe Lethien

The demand for high-performance energy storage devices to power Internet of Things applications has driven intensive research on micro-supercapacitors (MSCs). In this study, RuN films made by magnetron sputtering as an efficient electrode material for MSCs are investigated. The sputtering...

Small, 2024, 20 (40), pp.2402607. ⟨10.1002/smll.202402607⟩. ⟨hal-04610328⟩

Article dans une revue

Phyllosilicates with embedded Fe‐based nanophases in Ryugu and Orgueil

Hugues Leroux, Corentin Le Guillou, Maya Marinova, Sylvain Laforet, Jean‐christophe Viennet, Bahae‐eddine Mouloud, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Daniel Hallatt, Mario Pelaez Fernandez, David Troadec, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope Ishii, John Bradley, Kenta Ohtaki, Elena Dobrică, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi Phan, Rolando Rebois, Neyda Abreu, Jennifer Gray, Thomas Zega, Pierre‐m. Zanetta, Michelle Thompson, Rhonda Stroud, Kate Burgess, Brittany Cymes, John Bridges, Leon Hicks, Martin Lee, Luke Daly, Phil Bland, Michael Zolensky, David Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Satoru Nakazawa, Tatsuaki Okada, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Makoto Yoshikawa, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Tomohiro Usui, Toru Yada, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamotoa, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda

Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They resemble CI chondrites material, thus showing clear evidence of extensive aqueous alteration attested by the widespread presence of a mixture of...

Meteoritics and Planetary Science, 2024, pp.1947-1965. ⟨10.1111/maps.14101⟩. ⟨hal-04295482⟩