Publications

Affichage des publications 501 à 510 sur 724 au total

Sciences de l'ingénieur

Tunable optoelectronic oscillator based on silicon micro-ring resonator

A new silicon optoelectronic oscillator (OEO) system is proposed and experimentally demonstrated. The proposed OEO, generates the microwave signal by beating the un-modulated and amplitude-modulated versions of the same laser source. The drop port…

Phuong Do, Carlos Alonso-Ramos, Xavier Le Roux, Laurent Vivien, Isabelle Ledoux, Bernard Journet, Eric Cassan

Optoelectronic Devices and Integration -

photonique

Antenna surface plasmon emission by inelastic tunneling

Surface plasmons polaritons are mixed electronic and electromagnetic waves. They have become a workhorse of nanophotonics because plasmonic modes can be confined in space at the nanometer scale and in time at the 10 fs scale. However, in practice,…

Cheng Zhang, Jean-Paul Hugonin, Anne-Lise Coutrot, Christophe Sauvan, François Marquier, Jean-Jacques Greffet

Nature Communications -

Science des matériaux

Fermi level shift in carbon nanotubes by dye confinement

Dye confinement into carbon nanotube significantly affects the electronic charge density distribution of the final hybrid system. Using the electron-phonon coupling sensitivity of the Raman G-band, we quantify experimentally how charge transfer from…

Yann Almadori, G. Delport, Romain Chambard, L. Orcin-Chaix, A. C. Selvati, Nicolas Izard, Anouar Belhboub, Raymond Aznar, B. Jousselme, S. Campidelli, Patrick Hermet, Rozenn Le Parc, T. Saito, Y. Sato, K. Suenaga, Pascal Puech, J.-S Lauret, Guillaume Cassabois, Jean-Louis Bantignies, Laurent Alvarez

Carbon -

Chimie

Raspberry-like small multicore gold nanostructures for efficient photothermal conversion in the first and second near-infrared windows

Gold nanoraspberries were synthesized by a seed-mediated synthesis with polyethylene glycol-functionalized bisphosphonates. The original structure shifted the optical absorption to infrared, revealing very efficient photothermal properties within…

Anouchka Plan Sangnier, Romain Aufaure, Soshan Cheong, Laurence Motte, Bruno Palpant, Richard Tilley, Erwann Guenin, Claire Wilhelm, Yoann Lalatonne

Chemical Communications -

Optique

Rotation measurements using a resonant fiber optic gyroscope based on Kagome fiber

We build a resonant fiber optic gyro based on Kagome hollow-core fiber. A semi-bulk cavity architecture based on an 18-m-long Kagome fiber permits achieving a cavity finesse of 23 with a resonance linewidth of 700 kHz. An optimized Pound-Drever-Hall…

Alexia Ravaille, Gilles Feugnet, Benoît Debord, Frédéric Gérôme, Fetah Benabid, Fabien Bretenaker

Applied optics -

Chimie

Redox-switching of ternary Ni(ii) and Cu(ii) complexes synthesis, experimental and theoretical studies along with second-order nonlinear optical properties

Four new ternary Ni(ii) and Cu(ii) complexes of ONO tridentate Schiff base and pyridylmethylenepyran (PyMP) ligands [(R-ONO)M(PyMP)] (R = anisyl = An M = Ni 1, Cu 2; R = ferrocenyl = Fc M = Ni 3, Cu 4) have been synthesized under facile reaction…

Néstor Novoa, Carolina Manzur, Thierry Roisnel, Vincent Dorcet, Nolwenn Cabon, Françoise Robin-Le Guen, Isabelle Ledoux-Rak, Samia Kahlal, Jean-Yves Saillard, David Carrillo, Jean-René Hamon

New Journal of Chemistry -

Supraconductivité

An observable prerequisite for the existence of persistent currents

A classical model is presented for persistent currents in superconductors. Their existence is argued to be warranted because their decay would violate the second law of thermodynamics. This conclusion is achieved by analyzing comparatively Ohm's law…

Jacob Szeftel, Nicolas Sandeau, Michel Abou Ghantous

The European Physical Journal B: Condensed Matter and Complex Systems -

Optique

Nitrogen impurities and fluorescent NVcenters in detonation nanodiamonds: identification and distinct features

We show that nitrogen is the main impurity contained in detonation nano-diamonds (DNDs), at a concentration of ~16000 ppm. The content of nitrogen-vacancy (NV-) centers in these DNDs is ~2.7 ppm, which is the largest of all known types of nano…

V. Yu. Osipov, S. Abbasi Zargaleh, François Treussart, K. Takai, N. Romanov, F. Shakhov, A. Baldycheva, Osipov V Yu, Zargaleh S Abbasi

Journal of Optical Technology -