Now showing items 1-20 of 27

    • 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
      Open Access
      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 ...
    • An antireflection transparent conductor with ultralow optical loss (o2 %) and electrical resistance (o6O 2) 

      Maniyara, Rinu Abraham; Mkhitaryan, Vahagn K.; Chen, Tong Lai; Ghosh, Dhriti Sundar; Pruneri, Valerio (Nature, 2016-12-19)
      Article
      Open Access
      Transparent conductors are essential in many optoelectronic devices, such as displays, smart windows, light-emitting diodes and solar cells. Here we demonstrate a transparent conductor with optical loss of B1.6%, that ...
    • An indium tin oxide-free polymer solar cell on flexible glass 

      Formica, Nadia; Mantilla Perez, Paola; Ghosh, Dhriti Sundar; Janner, Davide; Chen, T. L.; Huang, Minghuang; Garner, Sean; Martorell Pena, Jordi; Pruneri, Valerio (2015-02-05)
      Article
      Open Access
      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 its ...
    • 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
      Open Access
      : 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 ...
    • Antireflective Transparent Oleophobic Surface by Non-Interacting Cavities 

      Rombaut, Juan; Abraham Maniyara, Rinu; Bellman, Robert A.; Acquard, Daniel F.; Baca, Adra S.; Osmond, Johann; Senaratne, Wageesha; Quesada, Mark Alejandro; Baker, David; Mazumder, Prantik; Pruneri, Valerio (ACS, 2018-11-16)
      Article
      Open Access
      Oleophobic surfaces have been so far realized using complex micro-scale and nano-scale reentrant geometries where primary and secondary structures or overhang geometries are typically required. Here we propose a new ...
    • Direct growth of 2D and 3D graphene nano-structures over large glass substrates by tuning a sacrificial Cu-template layer 

      Marchena, Miriam; Song, Zhen; Senaratne, Wageesha; Li, Connie; Liu, Xinyuan; Baker, David; Canet Ferrer, Josep; Mazumder, Prantik; Soni, Kamal; Lee, Robert; Pruneri, Valerio (IOP, 2017-03-28)
      Article
      Open Access
      We demonstrate direct growth of two-dimensional (2D) and three-dimensional (3D) graphene structures on glass substrates. By starting from catalytic copper nanoparticles of different densities and using chemical vapour ...
    • Double-layer graphene for enhanced tunable infrared plasmonics 

      Rodrigo, Daniel; Tittl, Andreas; Lima, Odeta; García de Abajo, Francisco Javier; Pruneri, Valerio; Altug, Hatice (Nature, 2017-06-02)
      Article
      Open Access
      Graphene is emerging as a promising material for photonic applications owing to its unique optoelectronic properties. Graphene supports tunable, long-lived and extremely confined plasmons that have great potential for ...
    • Dry transfer of graphene to dielectrics and flexible substrates using polyimide as a transparent and stable intermediate layer 

      Marchena, Miriam; Wagner, Frederic; Arliguie, Therese; Zhu, Bin; Johnson, Benedict; Fernández, Manuel; Chen, Tong Lai; Chang, Theresa; Lee, Robert; Pruneri, Valerio; Mazumder, Prantik (IOP, 2018-04-30)
      Article
      Open Access
      We demonstrate the direct transfer of graphene from Cu foil to glass and flexible substrates such as PET, using polyimide (PI) mixed with an aminosilane (3-aminopropyltrimethoxysilane) or only PI, respectively, as intermediate ...
    • Efficient heralding of polarization-entangled photons from type-0 and type-II spontaneous parametric downconversion in periodically poled KTiOPO 4 

      Steinlechner, Fabian; Gilaberte, Marta; Jofre, Marc; Scheidl, Thomas; Pérez Torres, Juan; Pruneri, Valerio; Ursin, Rupert (2014-09-01)
      Article
      Restricted access - publisher's policy
      Ultrabright sources of entangled photon pairs with high heralding efficiency are an important step in the pursuit of high-bit-rate entanglement-base quantum key distribution, as well as an enabling tool for loss-sensitive ...
    • 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
      Open Access
      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 ...
    • Frequency conversion of structured light 

      Steinlechner, Fabian; Hermosa, Nathaniel; Pruneri, Valerio; Pérez Torres, Juan (Macmillan Publishers, 2016-02-15)
      Article
      Open Access
      Coherent frequency conversion of structured light, i.e. the ability to manipulate the carrier frequency of a wave front without distorting its spatial phase and intensity profile, provides the opportunity for numerous novel ...
    • Functionalized Transparent Surfaces with Enhanced Self-Cleaning against Ink Aerosol Contamination 

      Noyan, Mehmet A.; Guilhot, Denis; Pruneri, Valerio (Wiley, 2016-10-26)
      Article
      Open Access
      During operation of a standard commercial inkjet printer, suspended ink particles form an ink aerosol inside the printing chamber that can cause serious malfunctions, including contamination of the transparent window of ...
    • Highly flexible transparent electrodes containing ultrathin silver for efficient polymer solar cells 

      Ghosh, Dhriti Sundar; Liu, Quansheng; Mantilla Perez, Paola; Chen, T. L.; Mkhitaryan, Vahagn; Huang, Minghuang; Garner, Sean; Martorell Pena, Jordi; Pruneri, Valerio (2015-12-16)
      Article
      Open Access
      Transparent electrodes (TEs) having electrooptical trade-offs better than state-of-the-art indium tin oxide (ITO) are continuously sought as they are essential to enable flexible electronic and optoelectronic devices. In ...
    • 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
      Open Access
      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 ...
    • Measurement of sub-pulse-width temporal delays via spectral interference induced by weak value amplification 

      Salazar Serrano, L.J.; Janner, Davide; Brunner, Nicolas; Pruneri, Valerio; Pérez Torres, Juan (2014-01-27)
      Article
      Open Access
      We demonstrate experimentally a scheme to measure small temporal delays, much smaller than the pulse width, between optical pulses. Specifically, we observe an interference effect, based on the concepts of quantum weak ...
    • Mid-infrared Gas Sensing Using Graphene Plasmons Tuned by Reversible Chemical Doping 

      Bareza, Nestor Jr.; Gopalan, Kavitha K.; Alani, Rose; Paulillo, Bruno; Pruneri, Valerio (ACS, 2020-03-18)
      Article
      Open Access
      Highly confined plasmon modes in nanostructured graphene can be used to detect tiny quantities of biological and gas molecules. In biosensing, a specific biomarker can be concentrated close to graphene, where the optical ...
    • 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
      Open Access
      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 ...
    • 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
      Open Access
      : 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 ...
    • Passive Decoy-State Quantum Key Distribution with Coherent Light 

      Curty, Marcos; Jofre, Marc; Pruneri, Valerio; Mitchell, Morgan W. (MDPI, 2015-06-12)
      Article
      Open Access
      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 ...
    • Phase-sensitive plasmonic biosensor using a portable and large field-of-view interferometric microarray imager 

      Yesilkoy, Filiz; Terborg, Roland A.; Pello, Josselin; Belushkin, Alexander A.; Jahani, Yasaman; Pruneri, Valerio; Altug, Hatice (Nature, 2018-02-23)
      Article
      Open Access
      Nanophotonics, and more specifically plasmonics, provides a rich toolbox for biomolecular sensing, since the engineered metasurfaces can enhance light–matter interactions to unprecedented levels. So far, biosensing ...