Publicaciones

Affichage de 4931 à 4940 sur 16054

ART

Optical and Thermal Performances of (Ga,In)N/GaN Light Emitting Diodes Transferred on a Flexible Tape

B. Damilano, Marie Lesecq, Di Zhou, Éric Frayssinet, Sebastien Chenot, Julien Brault, N. Defrance, Abel Ebongue, Y. Cordier, Virginie Hoel

Blue (Ga,In)N-based light-emitting diodes (LEDs) grown on a Si(111) substrate by metal-organic vapor phase epitaxy are transferred on a flexible tape after the Si substrate removal. Their optical and thermal behaviors are measured and compared to those of regular LEDs on Si. The light output power...

IEEE Photonics Technology Letters, 2018, 30 (17), pp.1567-1570. ⟨10.1109/LPT.2018.2858000⟩. ⟨hal-02304909⟩

ART

Two dimensional modeling of elastic wave propagation in solids containing cracks with rough surfaces and friction – Part I: Theoretical background

Vladislav Aleshin, Steven Delrue, Andrey Trifonov, Olivier Bou Matar, Koen van den Abeele

Abstract Our study aims at the creation of a numerical toolbox that describes wave propagation in samples containing internal contacts (e.g. cracks, delaminations, debondings, imperfect intergranular joints) of known geometry with postulated contact interaction laws including friction. The code...

Ultrasonics, 2018, 82, pp.11-18. ⟨10.1016/j.ultras.2017.07.002⟩. ⟨hal-02364063⟩

ART

Dynamics of a broad-band quantum cascade laser: from chaos to coherent dynamics and mode-locking

L. Columbo, S Barbieri, C. Sirtori, M. Brambilla

The dynamics of a multimode quantum cascade laser, are studied in a model based on effective semiconductor Maxwell-Bloch equations, encompassing key features for the radiation-medium interaction such as an asymmetric frequency dependent gain and refractive index as well as the phase-amplitude...

Optics Express, 2018, 26 (3), pp.2829. ⟨10.1364/OE.26.002829⟩. ⟨hal-02403192⟩

ART

Microscale ultrahigh-frequency resonant wireless powering for capacitive and resistive MEMS actuators

Yoshio Mita, Naoyuki Sakamoto, Naoto Usami, Antoine Frappé, Akio Higo, Bruno Stefanelli, Hidehisa Shiomi, Julien Bourgeois, Andreas Kaiser

This paper presents a versatile chip-level wireless driving method for microelectromechanical system (MEMS) actuators. A MEMS actuator is integrated as an electrical component of a coupled LCR resonant circuit, and it rectifies the energy sent through an ultrahigh-frequency (UHF) radio frequency (...

Sensors and Actuators A: Physical , 2018, 275, pp.75-87. ⟨10.1016/j.sna.2018.03.020⟩. ⟨hal-02182815⟩

ART

Wavelength characterization of an acousto-optic notch filter for unpolarized near-infrared light

Jean-Claude Kastelik, Justine Champagne, Samuel Dupont, Konstantin B. Yushkov

A cascaded system of two acousto-optical cells is proposed and experimentally demonstrated for optical notch rejection filtering in the spectral range from 1400 nm to 1600 nm. Two similar paratellurite acousto-optical devices for unpolarized light are used in a free-space gap of a fiber line....

Applied optics, 2018, 57 (10), pp.C36-C41. ⟨10.1364/AO.57.000C36⟩. ⟨hal-03183486⟩

COMM

Scanning microwave microscopy of vital mitochondria in respiration buffer

Jinfeng Li, Zahra Nemati, Kamel Haddadi, Douglas C. Wallace, Peter J. Burke

We demonstrate imaging using scanning microwave microscopy (SMM) of vital mitochondria in respiration buffer. The mitochondria are isolated from cultured HeLa cells and tethered to a solid graphene support. The mitochondria are kept vital (alive) using a respiration buffer, which provides nutrients...

IEEE/MTT-S International Microwave Symposium, IMS 2018, Jun 2018, Philadelphia, PA, United States. pp.115-118, ⟨10.1109/MWSYM.2018.8439645⟩. ⟨hal-03224648⟩

ART

10-Gb/s Indoor THz Communications Using Industrial Si Photonics Technology

Elsa Lacombe, Cybelle Belem-Gonçalves, Cyril Luxey, Frédéric Gianesello, Cédric Durand, Daniel Gloria, Guillaume Ducournau

In this letter, we report the design, fabrication, and measurement of a silicon photonics-based transmitter (Tx) offering both mass production capability and high integration level potentiality. The Tx circuit consists of an integrated photodiode generating a 200-300-GHz signal for photonic...

IEEE Microwave and Wireless Components Letters, 2018, 28 (4), pp.362-364. ⟨10.1109/LMWC.2018.2811242⟩. ⟨hal-03183484⟩

ART

Accuracy of parameter identification using the dispersion of surface waves and the role of data quality for inhomogeneous concrete

Radoslaw Drelich, Mariusz Kaczmarek, Bogdan Piwakowski

We study the influence of the data quality on the accuracy of parameter identification for inhomogeneous concrete. The surface of the concrete may differ as a result of either intentional action (decoration or repair) or the interaction of initially homogeneous concrete with the environment. Non-...

NDT & E International, 2018, 98, pp.195-207. ⟨10.1016/j.ndteint.2018.05.002⟩. ⟨hal-03185113⟩

ART

Modeling of a Circular Ring MEMS Resonator with Voltage Excitation by Means of an Orthogonal Polynomial Method

Ismail Naciri, Abdessamad Rguiti, Lahoucine Elmaimouni, Jean-Etienne Lefebvre, Faniry Emilson Ratolojanahary, Tadeusz Gryba

The three-dimensional vibrational behavior of a piezoelectric circular ring made of a 6 mm hexagonal material is studied using Legendre polynomial method. The method is simple to implement and based on expanding the electrical potential and the mechanical displacement components in a double series...

Acta Acustica united with Acustica, 2018, 104 (4), pp.553-560. ⟨10.3813/AAA.919196⟩. ⟨hal-03185120⟩

ART

A simplified modal expansion formalism adapted to the optical design of resonant cavity enhanced photodetectors using metallic gratings

Maximilien Billet, Emilien Peytavit

In this communication, we present a method to model the light absorption in a resonant photoconductor based on a photoconductive layer sandwiched between a metallic grating in front side and a metallic backside mirror. We started from a modal expansion formalism previously developed in order to...

Optik, 2018, 154, pp.828 - 839. ⟨10.1016/j.ijleo.2017.10.041⟩. ⟨hal-02997746⟩