Now showing items 1-19 of 19

  • An optofluidic router in a low-cost (PDMS) platform for rapid parallel sample analysis 

    Goyvaerts, Jeroen (Universitat Politècnica de Catalunya, 2016-09-09)
    Master thesis
    Open Access
    Optofluidic system for (bio)chemical applications are becoming more demanding in terms of num- ber of control points, number of light sources and readout equipment. So far, most of these sys- tems require several light ...
  • Coupling of photonic wire bonds to TriPleX waveguides 

    Cabrejo Ponce, Meritxell (Universitat Politècnica de Catalunya, 2017-05-31)
    Bachelor thesis
    Restricted access - confidentiality agreement
    Covenantee:  Karlsruher Institut für Technologie
  • Design of an integrated coherent receiver with polarization diversity 

    Villalba Jiménez, Isabel María (Universitat Politècnica de Catalunya, 2014-11-17)
    Master thesis
    Open Access
    [ANGLÈS] In this master thesis it has been designed a multimode interference device with great features, great bandwidth and strongly insensitive to hardware impairments. The device implements a 120º hybrid which may be ...
  • Early detection of biofilms using low-cost polymeric optical Lab-on-a-chip 

    Antúnez Vallès, Bernat (Universitat Politècnica de Catalunya, 2015-09-09)
    Master thesis
    Open Access
    Covenantee:  Universitat Autònoma de Barcelona / Universitat de Barcelona / Institut de Ciències Fotòniques (ICFO)
    In surface colonization, microorganisms tend to form complex biological structures containing cells and adhesion molecules, called biofilms, which provide them with high stability and resistance to biocide compounds. These ...
  • Enhancement of absorption and nonlinearities in nanostructures and metamaterials 

    Solerdelcoll i Vila, Núria (Universitat Politècnica de Catalunya, 2019-06-26)
    Bachelor thesis
    24 months embargo
    Humans have lived hand in hand with light since the beginning of time. The more the knowledge and technology advances, the more discoveries and applications involving electromagnetic waves are found and created. This thesis ...
  • Estudio de la reconstrucción del perfil espacial del haz en láseres de diodos de alta potencia 

    Aguado Arumi, Carlos (Universitat Politècnica de Catalunya, 2018-09-10)
    Bachelor thesis
    Open Access
    El presente trabajo tiene como objetivo principal diseñar, automatizar e implementar un método para la caracterización de perfiles espaciales de haces de luz, emitidos por láseres de diodo de alta potencia. Mediante medidas ...
  • Exploring NbTiN superconducting single photon detectors with quantum detector tomography 

    Rivera Hernández, Juan Carlos (Universitat Politècnica de Catalunya, 2019-09-09)
    Master thesis
    Open Access
    The optical response of NbTiN superconducting single photon detectors is studied using quantum detector tomography which separates the detector response in single and multiple photon contributions. Three different NbTiN ...
  • Investigation of the light propagation in the human forearm 

    Vázquez Martín, Irene (Universitat Politècnica de Catalunya, 2017-09-08)
    Master thesis
    Open Access
    Covenantee:  Universität Ulm
    In the present study it is investigated the applicability of spectrally resolved reflectance at a certain distance from the incident beam to determine the optical coefficients of multi-layered tissues. The main motivation ...
  • Light scattering self-assembled nanostructures for optoelectronic devices 

    Grande, Adrián (Universitat Politècnica de Catalunya, 2018-06)
    Bachelor thesis
    Open Access
    Covenantee:  Karlsruher Institut für Technologie. Licht nutzen und erforschen
    Light management based on nanostructured surfaces has been proved to be one of the most promising solutions for improving light absorption in thin film solar cells and light out- coupling in OLEDs. In this work, quasi-random ...
  • Modelling of general relativity phenomena with photonics 

    Fernández Núñez, Isabel Dèlia (Universitat Politècnica de Catalunya, 2014-07-18)
    Master thesis
    Open Access
    [ANGLÈS] Metamaterials are man-made artificial materials whose electromagnetic parameters the permittivity and permeability are determined by its internal structure rather than their substance. An analogy between the ...
  • Nonlinear frequency conversion under general phase mismatched condition: the role of phase locking and random nonlinear domains 

    Vito, Roppo (Universitat Politècnica de Catalunya, 2011-06-15)
    Doctoral thesis
    Open Access
    In the field of second harmonic (SH) generation most studies have been concerned with maximizing conversion efficiencies, generally achievable at the phase matching (PM) condition. Outside of the PM the conversion efficiency ...
  • Novel stabilizers for P3HT:ICBA nanoparticle dispersions 

    Laguarta Alapont, Roger (Universitat Politècnica de Catalunya, 2018-09-06)
    Master thesis
    120 months embargo
    Novel additives have been used to the stabilization of P3HT:ICBA nanoparticle dispersions. Said additives were not reducing the efficiency of organic solar cells built from the stabilized dispersions.
  • Photonic lab-on-a-chip containing microbial-based alginate light waveguides for phenolic compounds determination. 

    Sanahuja Esteve, David (Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2014-09-08)
    Master thesis
    Open Access
    [ANGLÈS] Phenolic compounds are one of the main causes of environmental pollution of soils and water for their toxicity and persistence. Currently, phenolic compounds detection is principally done with bulky and expensive ...
  • Second harmonic generation in disordered nonlinear crystals : application to ultra-short laser pulse characterization 

    Wang, Bingxia (Universitat Politècnica de Catalunya, 2017-10-10)
    Doctoral thesis
    Open Access
    Covenantee:  Aix-Marseille Université
    The PhD project, entitled "Second harmonic generation in disordered nonlinear crystals: application to ultra-short laser pulse characterization", is devoted to the study of second harmonic generation in nonlinear ferroelectric ...
  • Shaping of light beams with photonic crystals : spatial filtering, beam collimation and focusing 

    Maigyte, Lina (Universitat Politècnica de Catalunya, 2014-07-01)
    Doctoral thesis
    Open Access
    The research developed in the framework of this PhD thesis is a theoretical, numerical and experimental study of light beam shaping (spatial filtering, beam collimation and focusing) in the visible frequency range using ...
  • Spectroscopic characterization of Er3+, Yb3+ co-doped UC single crystals : the influence of host and sensitizer concentrations 

    Saleta Reig, David (Universitat Politècnica de Catalunya, 2018-10-24)
    Master thesis
    Open Access
    Covenantee:  Bundesanstalt für Materialforschung und -prüfung
    The energy transfer upconversion (ETU) mechanism is known to be the most efficient route for the conversion of near infrared (NIR) light to visible emission in Ln3+-co-doped systems. In this work, we examined these energy ...
  • Surface and bulk harmonic generation in the opaque region of GaAs 

    Rodríguez Suñé, Laura (Universitat Politècnica de Catalunya, 2018-09-06)
    Master thesis
    Open Access
    We demonstrate second and third harmonic generation from a GaAs substrate, far from the phase matching and well-below the absorption edge, in both transmission and reflection geometries. The pump is tuned in the transparency ...
  • Ultra short laser pulse characterization device based on disordered nonlinear crystals 

    Cubero Gamito, Guillermo (Universitat Politècnica de Catalunya, 2017-10-27)
    Master thesis
    Open Access
    Covenantee:  Institut de Ciències Fotòniques (ICFO) / Universitat de Barcelona / Universitat Autònoma de Barcelona
    In this project we build and test a compact and portable optical device for ultrashort pulse characterization. This setup allows the measurement of the pulse duration as well as its chirp parameter by using the so called ...
  • Ultra-short pulse characterization, a new in-situ approach using disordered nonlinear crystals 

    Parra Martínez, Albert (Universitat Politècnica de Catalunya, 2014-09-10)
    Master thesis
    Open Access
    [ANGLÈS] A new single-shot assembly for ultra-short laser pulse characterization using ferroelectric crystals with inverted randomly distributed nonlinear domains is studied in detail. The second harmonic autocorrelation ...