Search results for "fuite"
showing 7 items of 7 documents
Quelle attractivité pour les études scientifiques dans une société de la connaissance ?
2014
Depuis une vingtaine d'années, le thème de l'attractivité des filières scientifiques dans l'enseignement supérieur a suscité de nombreuses controverses questionnant, par exemple, l'intérêt des jeunes pour les sciences, la manière de les enseigner ou même la fuite des cerveaux. Cet ouvrage apporte un éclairage longitudinal à ces débats en regardant comment la question de l'attractivité se pose dans les parcours scolaires et universitaires, puis dans les trajectoires professionnelles des jeunes diplômés. À partir de l'exploitation de différentes enquêtes, les auteurs soulignent l'importance des stratégies d'orientation et d'insertion professionnelle des élèves et étudiants face à un marché du…
Représentation et langage de la fuite dans "Pauliska" de Révéroni Saint-Cyr
2002
Il contributo si propone di esaminare il tema della fuga nel romanzo "Pauliska" di Révéroni Saint-Cyr. Il tema, in effetti, costituisce in questo romanzo un vero e proprio topos che consente alla trama di dipanarsi e di trovare occasione per fare ripartire la dieresi.
Polymer-metal plasmonic waveguide : passive and active components for integrated photonics
2009
Dielectric loaded surface plasmon polariton waveguides (DLSPPWs) enable transmission at a sub-wavelength scale of both electrical and plasmonic (optical waves at the interface between a metal and a dielectric) signals in the same circuitry. Moreover, the use of a polymer as the dielectric load enables the functionalization of DLSPPWs. Therefore, this configuration is of great interest for integrated photonic applications. However, DLSPPWs suffer strong losses due to dissipation into the metal film. We address here the possibility of compensating the losses using a configuration analogous to an optical amplifier. We first set theoretical (effective index model), numerical (differential metho…
Contrôle de nano-antennes optiques par une commande électrique : tuner plasmonique et transduction
2011
Optical nano-antennae are the new class of components to control light/matterinteraction at the nanoscale. These devices are operating in the visible to near infraredpart of the spectrum. The properties of these nano objects are controlled by theform, the size and the material.In the radio frequency domain, the tuner changes dynamically the operatingwavelength of the antenna. In this thesis work, we search to transfer this conceptto the nanoscale. The principle is to change the load impedance of the antenna, i.e.changing the optical index of the dielectric medium around the nano-object. Forthat we used anisotropic liquid cristal molecules. The value of the optical index iscontrolled by appl…
Fabrication and characterization of thermo-plasmonic routers for telecom applications
2013
The Dielectric Loaded Surface Plasmon Polariton Waveguides (DLSPPWs) have recently emerged as a possible solution to carry both optical and electrical signals on- chip. However, in the particular context of optical interconnects, advanced functionalities such as filtering, switching, and routing are required in order to replace in the future the equivalent electronic components which are too much power consumer and also to reduce their footprints. After presenting the interest and limitation of the leakage radiation microscopy method used all along this work, we show several active devices using thermo-sensitive polymers as the dielectric load driven electrically by Joule heating. Then we d…