Enviaments recents

  • Pump-tuned deep-infrared femtosecond optical parametric oscillator across 6-7 μm based on CdSiP2 

    CHAITANYA KUMAR, s.; ESTEBAN-MARTIN, Adolfo; SANTANA, A.; ZAWILSKI, K. T.; SCHUNEMANN, P. G.; EBRAHIM-ZADEH, M. (OSA, 2016-07-15)
    Article
    Accés obert
    We report on a high-power femtosecond optical parametric oscillator (OPO) at 80 MHz repetition rate, tunable across 6318–7061 nm in the deep-infrared (deep-IR) using pump wavelength tuning. The OPO, based on CdSiP2CdSiP2 ...
  • Low temperature direct growth of graphene patterns on flexible glass substrates catalysed by a sacrificial ultrathin Ni film 

    Marchena, Miriam; Janner, Davide; Chen, Tong Lai; Finazzi, Vittoria; Pruneri, Valerio (OSA, 2016-08-01)
    Article
    Accés obert
    Direct deposition of graphene on substrates would avoid costly, time consuming and defect inducing transfer techniques. In this paper we used ultrathin films of Ni, with thickness ranging from 5 to 50 nm, as a catalytic ...
  • Time-domain separation of optical properties from structural transitions in resonantly bonded materials 

    Waldecker, Lutz; Miller, Timothy A.; Rudé, Miquel; Bertoni, Roman; Osmond, Johann; Simpson, Robert E.; Ernstorfer, Ralph; Wall, Simon (Nature Publishing Group, 2015-07-27)
    Article
    Accés obert
    The extreme electro-optical contrast between crystalline and amorphous states in phase-change materials is routinely exploited in optical data storage1 and future applications include universal memories2, flexible displays3, ...
  • Mid-Infrared Plasmonic Biosensing with Graphene 

    Rodrigo, Daniel; Limaj, Odeta; Janner, Davide; Etezadi, Dordaneh; García de Abajo, Francisco Javier; Pruneri, Valerio; Altug, Hatice (Science, 2015-07-10)
    Article
    Accés obert
    Infrared spectroscopy is the technique of choice for chemical identification of biomolecules through their vibrational fingerprints. However, infrared light interacts poorly with nanometric-size molecules. We exploit the ...
  • Passive Decoy-State Quantum Key Distribution with Coherent Light 

    Curty, Marcos; Jofre, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
    Article
    Accés obert
    Signal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups ...
  • Resonant Visible Light Modulation with Graphene 

    Yu, Renwen; Pruneri, Valerio; García de Abajo, Francisco Javier (ACS, 2015-03-13)
    Article
    Accés obert
    Fast modulation and switching of light at visible and near-infrared (vis–NIR) frequencies are of utmost importance for optical signal processing and sensing technologies. No fundamental limit appears to prevent us from ...
  • Enhancement of the sensitivity of a temperature sensor based on fiber Bragg gratings via weak value amplification 

    Salazar-Serrano, L. J.; Barrera, D.; Amaya, W.; Sales, S.; Pruneri, Valerio; Capmany, J.; Pérez Torres, Juan (OSA, 2015-09-01)
    Article
    Accés obert
    We present a proof-of-concept experiment aimed at increasing the sensitivity of temperature sensors implemented with Fiber Bragg gratings by making use of a weak value amplification scheme. The technique requires only ...
  • Active Control of Surface Plasmon Waveguides with a Phase Change Material 

    Rudé, Miquel; Simpson, Robert E.; Quidant, Romain; Pruneri, Valerio; Renger, Jan (2015-05-25)
    Article
    Accés obert
    The ability to manipulate light propagation at the nanoscale is of vital importance for future integrated photonic circuits. In this work we exploit the high contrast in the optical properties of the phase change material ...
  • Nanopatterned Graphene on a Polymer Substrate by a Direct Peel-off Technique 

    Chen, T. L.; Ghosh, D. S.; Marchena, M.; Osmond, J.; Pruneri, Valerio (ACS Publications, 2015-02-24)
    Article
    Accés obert
    : A graphene (Gr) on a polyimide (PI) polymer film (Gr−PI film), obtained by a direct peel-off technique, is proposed and investigated. Thanks to its high transparency, electrical conductivity, mechanical strength, and ...
  • An Indium Tin Oxide-Free Polymer Solar Cell on Flexible Glass 

    Formica, Nadia; Mantilla-Perez, Paola; Ghosh, Dhriti S.; Janner, David; Chen, Tong Lai; Huang, Minghuang; Garner, Sean; Martorell, Jordi; Pruneri, Valerio (2015-02-05)
    Article
    Accés obert
    : Future optoelectronic devices and their low-cost roll-to-roll production require mechanically flexible transparent electrodes (TEs) and substrate materials. Indium tin oxide (ITO) is the most widely used TE because of ...

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