Now showing items 1-20 of 38

    • 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 image cytometer based on angular spatial frequency processing and its validation for rapid detection and quantification of waterborne microorganisms 

      Pérez-Rosas, Juan Miguel; Jofre Cruanyes, Marc; Martínez, Pedro; Yañez, M. Adela; Catalan, Vicente; Pruneri, Valerio (2015)
      Article
      Restricted access - publisher's policy
      We introduce a new image cytometer design for the detection of very small particulates and demonstrate its capability in water analysis. The device is a compact microscope composed of off-the-shelf components, such as a ...
    • 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 ...
    • An ultra-compact particle size analyser using a CMOS image sensor and machine learning 

      Hussain, Rubaiya; Martinez Cordero, Pedro Antonio; Coll, T.; Pruneri, Valerio (2020-12)
      Article
      Open Access
      Light scattering is a fundamental property that can be exploited to create essential devices such as particle analysers. The most common particle size analyser relies on measuring the angle-dependent diffracted light from ...
    • Antireflective multilayer surface with self-cleaning subwavelength structures 

      Rombaut Segarra, Juan; Pruneri, Valerio (2021-03-17)
      Article
      Open Access
      The suppression of optical reflection from a surface is essential in many applications, ranging from displays with reduced disturbance from ambient light to high-efficiency photovoltaic cells and stable light detection and ...
    • 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 ...
    • Controlling mid-infrared plasmons in graphene nanostructures through post-fabrication chemical doping 

      Paulillo, Bruno; Bareza, Nestor Jr; Pruneri, Valerio (IOP, 2021-05-07)
      Article
      Open Access
      Engineering the doping level in graphene nanostructures to yield controlled and intense localized surface plasmon resonance (LSPR) is fundamental for their practical use in applications such as molecular sensing for point ...
    • Controlling mid-infrared plasmons in graphene nanostructures through post-fabrication chemical doping 

      Paulillo, Bruno; Bareza, Néstor; Pruneri, Valerio (2021-07-01)
      Article
      Open Access
      Engineering the doping level in graphene nanostructures to yield controlled and intense localized surface plasmon resonance (LSPR) is fundamental for their practical use in applications such as molecular sensing for point ...
    • 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 ...
    • Domain inverted acousto- and electrooptic devices and their application to optical communication, sensing, laser sources, and quantum key distribution 

      Janner, Davide; Tulli, Domenico; Jofre Cruanyes, Marc; Yudistira, Didit; Balsamo, Stefano; Belmonte, Michele; Pruneri, Valerio (2013-11)
      Article
      Restricted access - publisher's policy
      The current status of domain inverted lithium niobate acousto- and electrooptic devices is reviewed. We introduce the main domain microengineering techniques and their impact on modulators' performance in terms of reduced ...
    • 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 Cruanyes, 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 ...
    • Fast optical source for quantum key distribution based on semiconductor optical amplifiers 

      Jofre Cruanyes, Marc; Gardelein, Arnaud; Anzolin, Gabriele; Amaya, Waldimar; Capmany, Jose; Ursin, Rupert; Peñate, Laura; López, D.; San Juan, J. L.; Carrasco, J. A.; Garcia, F.; Torcal-Milla, F. J.; Sanchez-Brea, L. M.; Bernabeu, E.; Perdigues Armengol, Josep Maria; Jennewein, Thomas; Torres, Juan P.; Mitchell, Morgan W.; Pruneri, Valerio (2011)
      Article
      Open Access
      A novel integrated optical source capable of emitting faint pulses with different polarization states and with different intensity levels at 100 MHz has been developed. The source relies on a single laser diode followed ...
    • 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 ...