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Affichage de 5171 à 5180 sur 16085

Article dans une revue

Influence of capillarity and gravity on confined Faraday waves

S. Diwakar, Vibhor Jajoo, Sakir Amiroudine, Satoshi Matsumoto, Ranga Narayanan, Farzam Zoueshtiagh

Experiments characterizing the influence of gravity and interfacial tension on Faraday instability in immiscible, confined fluid layers are presented. The variation in interfacial tension was obtained by controlling the temperature of a suitable binary fluid pair while the influence of gravity was…

Physical Review Fluids, 2018, 3 (7), ⟨10.1103/PhysRevFluids.3.073902⟩. ⟨hal-03185122⟩

Article dans une revue

Magnetoplasmonic nanograting geometry enables optical nonreciprocity sign control

L. Halagačka, Mathias Vanwolleghem, Francois Vaurette, J. Ben Youssef, K. Postava, J. Pištora, Béatrice Dagens

We experimentally demonstrate a disruptive approach to control magnetooptical nonreciprocal effects. It has been known that the combination of a magneto-optically (MO) active substrate and extraordinary transmission (EOT) effects through deep-subwavelength nanoslits of a noble metal grating, leads…

Optics Express, 2018, 26 (24), pp.31554. ⟨10.1364/OE.26.031554⟩. ⟨hal-03084454⟩

Article dans une revue

Ferroelastic relaxation at 20 GHz evidenced by large frequency range picosecond acoustics

Arnaud Devos, F. Casset, G. Le Rhun, P. Emery, S. Fanget, E. Defay

We present a method to perform elastic measurements on a thin-film as a function of frequency between a few GHz and a few hundred GHz. The technique is mainly based on Picosecond Acoustics (PA), which is an ultrafast optical technique that realizes pulse-echo measurements in the hypersonic range.…

Applied Physics Letters, 2018, 112 (26), ⟨10.1063/1.5035479⟩. ⟨hal-03183473⟩

Communication dans un congrès

A broadband 4-18 GHz active quadrature hybrid

Paul Sangare, Christophe Loyez, Kevin Carpentier, Markus Mayer, Dirk Hartung, Francois Parickmiler, Nathalie Rolland

This paper presents an innovative topology of a broadband active quadrature hybrid. This novel architecture consists of a traveling wave amplifier with a unique coupling mechanism, providing amplitude flatness and low phase imbalance over the 4 - 18 GHz frequency band. Experimental results validate…

13th European Microwave Integrated Circuits Conference (EuMIC), Sep 2018, Madrid, Spain. pp.126-129, ⟨10.23919/EuMIC.2018.8539897⟩. ⟨hal-03270106⟩

Communication dans un congrès

On the two-way diamond relay channel with lattice-based Compress-and-Forward

Anne Savard, Laurent Clavier

This paper focuses on the full-duplex Gaussian two-way diamond relay channel (TWDRC), where two users wish to exchange their messages with the help of two relays, when one relay performs a lattice-based Compress-and-Forward (CF) scheme. The other relay performs either Decode-and-Forward (DF),…

IEEE Wireless Communications and Networking Conference (WCNC), Apr 2018, Barcelona, Spain. pp.1772-1777, ⟨10.1109/WCNC.2018.8377136⟩. ⟨hal-03270107⟩

Communication dans un congrès

Indoor 100 Gbit/s THz data link in the 300 GHz band using fast photodiodes

Vinay Kumar Chinni, Malek Zegaoui, Christophe Coinon, X. Wallart, Emilien Peytavit, Jean-Francois Lampin, P. Szriftgiser, Mohammed Zaknoune, Guillaume Ducournau

This paper presents recent achievements towards 100 Gbit/s data links for future 300 GHz communication systems with the new IEEE 802.15.3d standard. Resonant photodiodes structures, and their application for QAM-16 data links in the THz range are shown in indoor scenario.

25th International Conference on Telecommunications (ICT), Jun 2018, Saint Malo, France. pp.288-290, ⟨10.1109/ICT.2018.8464945⟩. ⟨hal-03286177⟩

Chapitre d'ouvrage

Chapter 5 - Transmission in 2D phononic crystals and acoustic metamaterials

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

In this chapter we describe the basic concepts of two-dimensional (2D) phononic crystals. We start with a detailed presentation of the elementary methods for the calculation of band structures and transmission phenomena which have proven their efficiency in the literature. We respectively present…

Phononics: interface transmission tutorial book series, Elsevier, pp.271-373, 2018, ISBN 978-0-12-809948-3 ; e-ISBN 978-0-12-809931-5. ⟨10.1016/B978-0-12-809948-3.00005-3⟩. ⟨hal-03356298⟩

Communication dans un congrès

Magnonic analogue of electromagnetic induced transparency in detuned magnetic circuit

Abdelkader Mouadili, El Houssaine El Boudouti, Housni Al-Wahsh, Abdellatif Akjouj, Bahram Djafari-Rouhani, L. Dobrzynski

A simple magnetic device consisting of two dangling side stubs grafted at the same site along a waveguide is designed to obtain a magnonic analogue of electromagnetic induced transparency (EIT) resonance. By detuning the lengths of the two stubs, a resonance can be squeezed between two transmission…

3rd International Conference on Electrical and Information Technologies, ICEIT 2017, Nov 2017, Rabat, Morocco. pp.1-5, ⟨10.1109/EITech.2017.8255227⟩. ⟨hal-03508198⟩

Article dans une revue

Addressing the exciton fine structure in colloidal nanocrystals: the case of CdSe nanoplatelets

Elena V Shornikova, Louis Biadala, Dmitri R Yakovlev, Victor F Sapega, Yuri G Kusrayev, Anatolie Mitioglu, Mariana V Ballottin, Peter C M Christianen, Vasilii V Belykh, Mikhail V Kochiev, Nikolai N Sibeldin, Aleksandr A Golovatenko, Anna V Rodina, Nikolay A Gippius, Alexis Kuntzmann, Ye Jiang, Michel Nasilowski, Benoit Dubertret, Manfred Bayer

We study the band-edge exciton fine structure and in particular its bright-dark splitting in colloidal semiconductor nanocrystals by four different optical methods based on fluorescence line narrowing and time-resolved measurements at various temperatures down to 2 K. We demonstrate that all these…

Nanoscale, 2018, 10 (2), pp.646-656. ⟨10.1039/C7NR07206F⟩. ⟨hal-02394900⟩

Article dans une revue

A time-domain model and experimental validation of the acoustic field radiated by air-coupled transducers

Ji Li, Bogdan Piwakowski

This paper presents a time-domain model for the prediction of an acoustic field in an air-coupled, noncontact, ultrasonic setup, which includes an air-coupled Emitter, the Propagation space and an aircoupled Receiver (EPR). The model takes into account the finite size of the aperture receiver,…

Ultrasonics, 2018, 82, pp.114-129. ⟨10.1016/j.ultras.2017.07.020⟩. ⟨hal-03183512⟩