Publications

Affichage des publications 511 à 520 sur 726 au total

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 -

photonique

Nonlinear response of a gallium phosphide nanopatterned photonic waveguide in the CW regime

The third-order Kerr nonlinear response in gallium phos-phide nanoscale waveguides is measured through continuous wave (CW) four-wave mixing. The extracted nonlinear coefficient ranges from about 800 W −1 m −1 to 1400 W −1 m −1 , consistently with…

Weilin Xie, Aude Martin, Gregoire Beaudoin, Isabelle Sagnes, Fabien Bretenaker, Sylvain Combrié, Fabrice Raineri, Alfredo De Rossi

Optics Letters -

photonique

Mode-Locking of the Hermite-Gaussian Modes of a Nanolaser

Mode locking is predicted in a nanolaser cavity forming an effective photonic harmonic potential. The cavity is substantially more compact than a Fabry-Perot resonator with a comparable pulsing period, which is here controlled by the potential. In…

Yifan Sun, Sylvain Combrié, Fabien Bretenaker, Alfredo de Rossi

Physical Review Letters -

Autre

Superlocalization of Excitons in Carbon Nanotubes at Cryogenic Temperature

At cryogenic temperature and at the single emitter level, the optical properties of single-wall carbon nanotubes depart drastically from that of a one-dimensional (1D) object. In fact, the (usually unintentional) localization of excitons in local…

C. Raynaud, T. Claude, Antoine Borel, Mohamed-Raouf Amara, A. Graf, J. Zaumseil, J.-S Lauret, Y. Chassagneux, Christophe Voisin

Nano Letters -