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Magadur G.,CNRS Orsay Institute of Molecular Chemistry | Lauret J.-S.,Laboratoire Of Photonique Quantique Et Moleculaire | Charron G.,CNRS Orsay Institute of Molecular Chemistry | Bouanis F.,CNRS Orsay Institute of Molecular Chemistry | And 7 more authors.
Journal of the American Chemical Society | Year: 2012

Assembly of paramagnetic Cu 2 complexes with a Schiff base scaffold possessing extended electron delocalization together with a quasi-planar structure onto carbon nanotubes induces a diameter-selective charge transfer from the complex to the nanotubes leading to an interestingly large and tunable ambipolar effect. We used complementary techniques such as electron paramagnetic resonance, absorption spectroscopy, and photoluminescence to ensure the success of the assembly process and the integrity of the complex in the nanohybrid. We carried out density functional theory type calculations to rationalize the experimental results, evidencing the selective enhanced interaction of the metal complexes with one type of nanotube. © 2012 American Chemical Society.

Magadur G.,CNRS Orsay Institute of Molecular Chemistry | Bouanis F.,CNRS Orsay Institute of Molecular Chemistry | Bouanis F.,Ecole Polytechnique - Palaiseau | Norman E.,Ecole Polytechnique - Palaiseau | And 5 more authors.
Chemical Communications | Year: 2012

The application of a negative gate voltage on a carbon nanotube field effect transistor decorated by a binuclear Tb(iii) complex leads to the generation of a negatively charged mononuclear one, presenting an electron density transfer to the nanotube and ambipolar behaviour. © 2012 The Royal Society of Chemistry.

Arcizet O.,CNRS Neel Institute | Jacques V.,Laboratoire Of Photonique Quantique Et Moleculaire | Siria A.,CNRS Condensed Matter Physics Laboratory | Poncharal P.,CNRS Condensed Matter Physics Laboratory | And 2 more authors.
Nature Physics | Year: 2011

We position a single nitrogen-vacancy (NV) centre hosted in a diamond nanocrystal at the extremity of a SiC nanowire. This novel hybrid system couples the degrees of freedom of two radically different systems: a nanomechanical oscillator and a single quantum object. We probe the dynamics of the nano-resonator through time-resolved nanocrystal fluorescence and photon-correlation measurements, conveying the influence of a mechanical degree of freedom on a non-classical photon emitter. Moreover, by immersing the system in a strong magnetic field gradient, we induce a magnetic coupling between the nanomechanical oscillator and the NV electronic spin, providing nanomotion readout through a single electronic spin. Spin-dependent forces inherent to this coupling scheme are essential in a variety of active cooling and entanglement protocols used in atomic physics, and should now be within the reach of nanomechanical hybrid systems. © 2011 Macmillan Publishers Limited. All rights reserved.

Lai N.D.,Laboratoire Of Photonique Quantique Et Moleculaire | Zheng D.,Laboratoire Of Photonique Quantique Et Moleculaire | Zheng D.,East China Normal University | Treussart F.,Laboratoire Of Photonique Quantique Et Moleculaire | Roch J.-F.,Laboratoire Of Photonique Quantique Et Moleculaire
Advances in Natural Sciences: Nanoscience and Nanotechnology | Year: 2010

The controlled and coherent manipulation of individual quantum systems is fundamental for the development of quantum information processing. The nitrogen-vacancy (NV) color center in diamond is a promising system since its photoluminescence is perfectly stable at room temperature and its electron spin can be optically read out at the individual level. We review here the experiments currently realized in our laboratory concerning the use of a single NV color center as the single photon source and the coherent magnetic manipulation of the electron spin associated with a single NV color center. Furthermore, we demonstrate a nanoscopy experiment based on the saturation absorption effect, which allows to optically pin-point a single NV color center at sub-γ resolution. This offers the possibility to independently address two or multiple magnetically coupled single NV color centers, which is a necessary step towards the realization of a diamond-based quantum computer. © 2010 Vietnam Academy of Science & Technology.

Zhang S.,East China Normal University | Zhang S.,Laboratoire Of Photonique Quantique Et Moleculaire | Audebert P.,Laboratoire Of Photophysique Et Photochimie Supramoleculaires Et Macromoleculaires | Wei Y.,East China Normal University | And 4 more authors.
Journal of Materials Chemistry | Year: 2011

We report on the synthesis and the optical properties of several novel ultraviolet (UV) semiconductors (R-NH3)2PbCl4. These semiconductors are two dimensional organic-inorganic perovskite (2DOIP) materials and have multiple quantum-well energy level structures. We systematically varied the organic components (R-NH3+), and discussed their influence on the self-organization ability, excitonic optical features, and long-term photo-stabilities of the 2DOIPs. The trends of selecting the organic groups to tailor the optical features and to improve the self-organization and long-term photo-stabilities of 2DOIPs are obtained by analyzing the experimental results. Self-organization abilities are found to be highly dependent on the interactions among the organic components. The excitonic optical properties of 2DOIPs are found to depend more on the steric structures, and less on the electronic structures and chemical properties of the organic groups (R-NH2) as long as the organic groups are optically inert. However, the long-term photo-stabilities of the (R-NH3) 2PbCl4 semiconductors are highly dependent on the thermal and photo stabilities of organic components. We find a new UV semiconductor, (C6H11CH2NH3)2PbCl 4 (CMPC), which has better photo-stability than the usually used (C6H5C2H4NH3) 2PbCl4 (PEPC). © 2011 The Royal Society of Chemistry.

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