Enviaments recents

  • Simulation and bulk detection of topological phases of matter 

    Maffei, Maria (Universitat Politècnica de Catalunya, 2019-01-29)
    Tesi
    Accés obert
    Differently from the majority of the other phases of matter, which are characterized by local order parameters, the topological phases are characterized by integer or semi-integer numbers, the topological invariants, which ...
  • Controlling the multipolar interference of nanoantennas 

    Hancu, Ion Michael (Universitat Politècnica de Catalunya, 2019-01-18)
    Tesi
    Accés obert
    The emission and detection of light is a main pillar of both fundamental research and the advancement of modern technologies. From digital communications and quantum computing to novel cancer treatments and faded jeans, ...
  • Novel nonlinear frequency conversion sources in the mid-infrared 

    Wei, Junxiong (Universitat Politècnica de Catalunya, 2018-12-18)
    Tesi
    Accés obert
    The goal of this thesis has been the development of a new class of advanced solid-state photonic sources for the mid-infrared (mid-IR) spectral regions, where there exists a severe shortage of practical coherent laser ...
  • Optomechanical resonators based on transition metal dichalcogenide monolayers 

    Morell Bennasser, Nicolás (Universitat Politècnica de Catalunya, 2018-12-17)
    Tesi
    Accés obert
    Suspended monolayer transition metal dichalcogenides (TMD) aremembranes that combine ultralow mass and exceptional optical prop-erties, making them intriguing materials for opto-mechanical applica-tions. However, the low ...
  • Classical and quantum aspects of the optical response at the nanoscale 

    Martínez Saavedra, José Ramón (Universitat Politècnica de Catalunya, 2018-12-10)
    Tesi
    Accés obert
    Nanophotonics is one of today’s basic sciences and technologies: an in-depth understanding of the interaction between light and matter on the nano-scale, besides its intrinsic associated scientific interest, enables the ...
  • Translation of non-invasive optical measurements of hemodynamics and oxygen metabolism to the clinic 

    Lindner, Claus (Universitat Politècnica de Catalunya, 2017-03-24)
    Tesi
    Accés obert
    Several clinical studies for non-invasive estimation of tissue hemodynamics by the combination of two diffuse optical techniques, time-resolved and diffuse correlation spectroscopy, were carried out in collaboration with ...
  • Thermal and optical-gain effects in nanophotonics with applications to sensing and perfect absorption 

    Meng, Lijun (Universitat Politècnica de Catalunya, 2018-12-11)
    Tesi
    Accés obert
    Surface plasmons, which are characteristic oscillations of induced charges at metal surfaces that can interact strongly with light, are a key topic in nanophotonics. It can tightly confine the optical electric energy in ...
  • Mass sensing with graphene and carbon nanotube mechanical resonators 

    Schwender, Jill (Universitat Politècnica de Catalunya, 2018-11-12)
    Tesi
    Accés obert
    In recent years, carbon nanotube and graphene mechanical resonators have attracted considerable attention because of their unique properties. Their high resonance frequencies, high quality factors and their ultra-low mass ...
  • Lens-free interferometric microscope for transparent materials 

    Terborg, Roland A. (Universitat Politècnica de Catalunya, 2018-10-19)
    Tesi
    Accés obert
    As health systems fight against epidemics and infectious diseases, new forms of diagnostics need to be developed in order to meet the growing demand for services, often in locations without the necessary infrastructure. ...
  • Optical surfaces for mid-infrared sensing 

    Gopalan, Kavitha Kalavoor (Universitat Politècnica de Catalunya, 2018-10-22)
    Tesi
    Accés obert
    The mid-infrared (mid-IR) spectral region, with wavelengths between 3 and 15 µm, is known for a wide range of applications ranging from spectroscopic sensing to thermal imaging. However, despite the strong technological ...
  • Quantum Brownian motion revisited : extensions and applications 

    Lampo, Aniello (Universitat Politècnica de Catalunya, 2018-10-02)
    Tesi
    Accés obert
    Quantum Brownian motion represents a paradigmatic model of open quantum system, namely a system which cannot be treated as an isolated one, because of the unavoidable interaction with the surrounding environment. In this ...
  • Nonlocal resources for quantum information tasks 

    Curchod, Florian John (Universitat Politècnica de Catalunya, 2018-10-11)
    Tesi
    Accés obert
    This thesis focusses on the essential features of Quantum Theory that are systems in an entangled state and Bell nonlocal correlations. Here, we take the angle of a resource theory and are interested in understanding better ...

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