Now showing items 21-40 of 71

    • Dynamic versus Anderson wave-packet localization 

      Borovkova, Olga V.; Lobanov, Valery E.; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Torner Sabata, Lluís (2015-06-18)
      Article
      Open Access
      We address the interplay between two fundamentally different wave-packet localization mechanisms, namely, resonant dynamic localization due to collapse of quasienergy bands in periodic media and disorder-induced Anderson ...
    • Electrically Driven Varifocal Silicon Metalens 

      Afridi, Adeel; Canet-Ferrer, Josep; Philippet, Laurent; Osmond, Johann; Berto, Pascal; Quidant, Romain (ACS, 2018-10-08)
      Article
      Open Access
      Optical metasurfaces have shown to be a powerful approach to planar optical elements, enabling an unprecedented control over light phase and amplitude. At that stage, where a wide variety of static functionalities have ...
    • Estudio de mercado a través de los clientes de una óptica 

      Ahsen Ahsen, Rabab (Universitat Politècnica de Catalunya, 2018-01-29)
      Bachelor thesis
      Open Access
      En el següent treball es duu a terme l’estudio de mercat de les òptiques actualment.. Es mostra bàsicament el funcionament del sector òptic començant per una breu anàlisi sobre com està desenvolupat a Espanya. Seguidament, ...
    • Fast silicon photomultiplier improves signal harvesting and reduces complexity in time-domain diffuse optics 

      Dalla Mora, Alberto; Martinenghi, Edoardo; Contini, Davide; Tosi, Alberto; Boso, Gianluca; Durduran, Turgut; Arridge, Simon; Martelli, Fabrizio; Farina, Andrea; Torricelli, Alessandro; Pifferi, Antonio (OSA, 2015-06-01)
      Article
      Open Access
      We present a proof of concept prototype of a time-domain diffuse optics probe exploiting a fast Silicon PhotoMultiplier (SiPM), featuring a timing resolution better than 80 ps, a fast tail with just 90 ps decay time-constant ...
    • Fiber-laser-based, green-pumped, picosecond optical parametric oscillator using fan-out grating PPKTP 

      Chaitanya Kumar, S.; Parsa, S.; Ebrahim-Zadeh, Majid (OSA, 2016-01-01)
      Article
      Open Access
      We report a stable, Yb-fiber-laser-based, green-pumped, picosecond optical parametric oscillator (OPO) for the near-infrared based on periodically poled potassium titanyl phosphate (PPKTP) nonlinear crystal, using fan-out ...
    • Formation of collimated beams behind the woodpile photonic crystal 

      Trull Silvestre, José Francisco; Maigyte, Lina; Malinauskas, Mangirdas; Mizeikis, Vygantas; Juodkazis, Saulius; Cojocaru, Crina; Rutkauskas, Marius; Peckus, Martynas; Sirutkaitis, Valdas; Staliunas, Kestutis (2011-09-09)
      Article
      Open Access
      We experimentally observe formation of narrow laser beams behind the woodpile photonic crystal, when the beam remains well collimated in free propagation behind the crystal. We show that the collimation depends on the input ...
    • Generation of arbitrary complex quasi-non-diffracting optical patterns 

      Ortiz Ambriz, Antonio; López Aguayo, Servando; Kartashov, Yaroslav V.; Vysloukh, Victor A.; Petrov, Dimitri; Garcia Gracia, Hipolito; Gutierrez Vega, Julio Cesar; Torner Sabata, Lluís (2013-09)
      Article
      Restricted access - publisher's policy
      Due to their unique ability to maintain an intensity distribution upon propagation, non-diffracting light fields are used extensively in various areas of science, including optical tweezers, nonlinear optics and quantum ...
    • Hardware simulator for optical correlation spectroscopy with Gaussian statistics and arbitrary correlation functions 

      Molteni, Matteo; Weigel, Udo M.; Remiro, Francisco; Durduran, Turgut; Ferri, Fabio (OSA, 2014-11-04)
      Article
      Open Access
      We present a new hardware simulator (HS) for characterization, testing and benchmarking of digital correlators used in various optical correlation spectroscopy experiments where the photon statistics is Gaussian and the ...
    • High-Efficiency Light-Emitting Diodes Based on Formamidinium Lead Bromide Nanocrystals and solution processed transport layers 

      Stasio, Francesco Di; Ramiro, Íñigo; Bi, Yu; Christodoulou, Sotirios; Stavrinadis, Alexandros; Konstantatos, Gerasimos (ACS, 2018-09-11)
      Article
      Open Access
      Perovskite nanocrystal light-emitting diodes (LEDs) employing architecture comprising a ZnO nanoparticles electron-transport layer and a conjugated polymer hole-transport layer have been fabricated. The obtained LEDs ...
    • Highly stable holographic dumbbel combined with accurate force measurements through back-focal-plane interferometry 

      Marsa Samper, Ferran (Universitat Politècnica de Catalunya, 2011-09-08)
      Master thesis
      Open Access
      English: Optical trapping experiments with multiple traps have been used to measure small net movements on the nanometer range, but at present more stability is demanded to measure even smaller scales which are typical of ...
    • Impression extraction for buildings by using EEG 

      Corominas Bosch, Mario (Universitat Politècnica de Catalunya, 2012)
      Master thesis (pre-Bologna period)
      Open Access
    • Information compression for remote readable ID tags 

      Horrillo, Sergi; Pérez Cabré, Elisabet; Millán Garcia-Varela, M. Sagrario (Institute of Physics (IOP), 2010-10-29)
      Article
      Open Access
    • Laue lens simulation for gamma radiation in the energy range of 1 MeV 

      Perengüez Lopez, James (Universitat Politècnica de Catalunya, 2013-05-20)
      Master thesis
      Open Access
      [ANGLÈS] The study of difraction applied to Laue lenses is a very promising tool in the field of astrophysics of gamma radiation. In the present work we carried out a theoretical study and a computational simulation of a ...
    • LED-Based Wake-Up circuit for microcontrollers 

      Ripoll Vercellone, Edgar; Reverter Cubarsí, Ferran; Gasulla Forner, Manuel (2020-07-15)
      Article
      Open Access
      This article proposes, analyzes, and tests a wake-up circuit for a microcontroller (MCU) that uses a light-emitting diode (LED), operating as a photodetector, illuminated by a smartphone flashlight. The wake-up circuit ...
    • Light control of orbital domains: case of the prototypical manganite La0.5Sr1.5MnO4 

      Miller, Timothy; Gensch, Michael; Wall, Simon (IOP, 2016-11-14)
      Article
      Open Access
      Control of electronic and structural ordering in correlated materials on the ultrafast timescale with light is a new and emerging approach to disentangle the complex interplay of the charge, spin, orbital and structural ...
    • Líneas de investigación en óptica visual y tecnología del color en el CD6 

      Pujol Ramo, Jaume; Vilaseca Ricart, Meritxell; Arjona Carbonell, Mª Montserrat; de Lasarte, Marta; Aldaba Arévalo, Mikel; Zuluaga Duque, Harold; Herrera Ramírez, Jorge Alexis; Díaz Douton, Fernando; Luque, Sergio Oscar; Sanabria Ortega, Fernando Guillermo; Ondategui Parra, Juan Carlos (2009)
      Conference report
      Open Access
    • Low-temperature colloidal synthesis of CuBiS2 nanocrystals for optoelectronic devices 

      Wang, Jian-Jun; Akgul, Zafer; Bi, Yu; Christodouloua, Sotirios; Konstantatos, Gerasimos (Royal Society of Chemistry, 2017-11-11)
      Article
      Open Access
      A new facile colloidal synthesis of CuBiS2 (CBS) nanocrystals with monodispersed size and good quality has been developed. The CBS nanocrystal films was deposited by solid-state ligand exchange and their field effect ...
    • Machine learning for optical modulation format recognition 

      Boada Farràs, Ricard (Universitat Politècnica de Catalunya, 2014-05)
      Bachelor thesis
      Open Access
      Covenantee:   Danmarks tekniske universitet
      [ANGLÈS] Next generation of optical networks will necessitate the use of advanced functionalities in the transceivers. In particular, modulation format recognition will enable dynamically switched energy efficient networks ...
    • Mesurador de potència òptica 

      Pont Bettineschi, Xavier (Universitat Politècnica de Catalunya, 2007-02)
      Master thesis (pre-Bologna period)
      Restricted access - confidentiality agreement
    • Method to generate complex quasinondiffracting optical lattices 

      López Aguayo, Servando; Konotop, Vladimir V; Kartashov, Yaroslav; Torner Sabata, Lluís (2010-07-02)
      Article
      Open Access
      We put forward a powerful technique that allows generating quasi-non-diffracting light beams with a variety of complex transverse shapes and topologies. We show that, e.g., spi-raling patterns, patterns featuring curved ...