Ara es mostren els items 21-32 de 32

    • Optical characterization of molecular beam epitaxy grown GaAs nanotrees 

      Garcia Garcia, óscar (Universitat Politècnica de Catalunya, 2018-07)
      Treball Final de Grau
      Accés obert
      In the aim to grow vertical self-catalyzed GaAs nanowires on [100] Si, fancy structures with a tapered shape resembling a tree were observed. They were called nanotrees. This is the first time that vertical growth has been ...
    • Optical phase effects in reconfigurable microwave photonic filters with multiple wavelength input 

      Nuño Gómez, Daniel-Juan; Santos Blanco, M. Concepción (2021-11)
      Article
      Accés obert
      Microwave photonic filters with a multiple wavelength input are analyzed. A comprehensive model assessing the impact of the phase characteristic of the optical stage is presented from which optimized design rules have been ...
    • Optical scattering in Phosphor-Converted LEDs 

      Segura García, Daniel (Universitat Politècnica de Catalunya, 2015-05)
      Projecte/Treball Final de Carrera
      Accés restringit per acord de confidencialitat
    • Optoelectronic devices for next generation optical fiber communications 

      Rueda Rodríguez, Luis Antonio (Universitat Politècnica de Catalunya, 2016-07-14)
      Treball Final de Grau
      Accés obert
      To meet the high demand on data traffic, it is essential the optimization of optical communication systems, specially, in terms of spectral efficiency as well as transmission rate In this thesis, the study carried out two ...
    • Photocurrent-detected 2D electronic spectroscopy reveals ultrafast hole transfer in operating PM6/Y6 organic solar cells 

      Bolzonello, Luca; Bernal Texca, Francisco Gumaro; Gerling Sarabia, Luis Guillermo; Ockova, Jana; Collini, Elisabetta; Martorell Pena, Jordi; van Hulst, Niek F. (2021-04-29)
      Article
      Accés obert
      The performance of nonfullerene-acceptor-(NFA)-based organic solar cells is rapidly approaching the efficiency of inorganic cells. The chemical versatility of NFAs extends the light-harvesting range to the infrared, while ...
    • Photodetectors based on low-dimensional materials and hybrid systems 

      Kuffer, Dominik (Universitat Politècnica de Catalunya, 2016-06-13)
      Tesi
      Accés obert
      In the last decade, two-dimensional (2D) materials have attracted attention both in the nascent field of flexible nanotechnology as well as in more conventional semiconductor technol-ogies. Within the rapidly expanding ...
    • Reducing the circadian input from self-luminous devices using hardware filters and software applications 

      Escofet Soteras, Jaume; Bará Viñas, Salvador (2015-12)
      Article
      Accés obert
      The widespread use of self-luminous devices at nighttime (cell-phones, computers, and tablets) raises some reasonable concerns regarding their effects on human physiology. Light at night is a known circadian disruptor, ...
    • Simulation of thermophotovoltaic devices based on c-Ge substrates 

      Shojaei Sola, David (Universitat Politècnica de Catalunya, 2023-02-02)
      Projecte Final de Màster Oficial
      Accés obert
      The project consists of carrying out simulations using the ATLAS tool from Silvaco International of c-Ge thermophotovoltaic (TPV) devices. Before going into device simulation, we develop a way to incorporate the surface ...
    • Single-layer Molybdenum disulfide photodetectors 

      López Sánchez, Oriol (Universitat Politècnica de Catalunya, 2012-02)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   École polytechnique fédérale de Lausanne
      [ANGLÈS] Two-dimensional (2D) materials are very attractive candidates for use in next-generation nanoelectronic devices. Compared to one-dimensional materials, with 2D materials is relatively easy to fabricate complex ...
    • Sistema de monitorización de la potencia del láser de un sistema lidar atmosférico 

      Bach Aguilà, Jordi (Universitat Politècnica de Catalunya, 2012-12-19)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] Design and implementation of a monitoring system of the power emitted by an atmospherical pulsed lidar (LIght Detection and Ranging) by measurements of diffuse radiation from the laser. The system allows the regular ...
    • Solution-growth and optoelectronic properties of ZnO:Cl@ZnS core-shell nanowires with tunable shell thickness 

      Fan, Jiandong; Fábrega, Cristian; Zamani, Reza; Shavel, Alexey; Güell, Frank; Carrete, Alex; Andreu, Teresa; López Martínez, Antonio Miguel; Morante Lleonart, Joan Ramon; Arbiol, Jordi; Cabota, Andreu (2013-04-05)
      Article
      Accés restringit per política de l'editorial
      Arrays of vertically aligned ZnO:Cl@ZnS core–shell nanowires (NWs) were grown by a facile low-cost, high-yield and seed-free two-step process. These NWs were used to demonstrate the potential of 3D electrodes based on ...
    • Zero change CMOS microring modulators at 1550 nm: Modeling and characterization 

      Cea Falcó, Marc de (Universitat Politècnica de Catalunya, 2017-06)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Massachusetts Institute of Technology
      While optical communications are the standard solution for long haul communications, its adoption for short range (i.e, intra- and inter-chip interconnects and metro-area) transmission systems, where a considerable increase ...