Now showing items 156-175 of 242

    Photodetectors based on graphene pn-junctions for mid-infrared and terahertz range 

    Castilla, Sebastián (Date of defense: 2022-01-27)

    Long wavelength light contains the infrared and terahertz (THz) spetral range of the spectrum. This wavelength range spans approximately from 1 µm to 1 mm. Several applications can be explored in this spectral range such ...

    Photodetectors based on low-dimensional materials and hybrid systems 

    Kuffer, Dominik (Date of defense: 2016-06-13)

    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 ...

    Photon control in nano-structured organic photovoltaic materials 

    Betancur Lopera, Rafael (Date of defense: 2013-07-10)

    Organic photovoltaic (OPV) technology has emerged as a potential cost-effective solution to produce electrical energy. The foreseen low manufacturing costs combined with features as semi-transparency or mechanical flexibility ...

    Photonic applications based on the use of structured light 

    Rosales Guzmán, Carmelo G. (Date of defense: 2015-05-22)

    Structured light beams, this is, beams whose phase changes from point to point in the transverse plane, provides with an alternative tool to search for new applications, or simply to expand the capabilities of current ...

    Photonic entanglement : new sources and new applications 

    Svozilík, Jiŕí (Date of defense: 2014-10-17)

    Non-classical correlations, usually referred as entanglement, are ones of the most studied and discussed features of Quantum Mechanics, since the initial introduction of the concept in the decade of 1930s. Even nowadays, ...

    Picosecond, high-repetition-rate, optical parametric sources from the ultraviolet to the deep-infrared 

    Canals Casals, Josep (Date of defense: 2018-10-18)

    High-power, high-repetition-rate coherent picosecond sources with high beam quality are of great interest for many scientific and technological applications. For example, coherent sources at the ultraviolet (UV) spectrum ...

    Plasmon-electron interactions in low dimensional materials 

    De Vega Esteban, Sandra (Date of defense: 2020-02-17)

    Ever since the advent of modern technology, major developments have come hand in hand with miniaturization and speed of operation. A proof of this is provided by the impressive success of Moore's law, which predicted that ...

    Plasmon-soliton waves in metal-nonlinear dielectric planar structures 

    Walasik, Wiktor (Date of defense: 2014-10-13)

    In this PhD thesis, we study properties of stationary transverse magnetic polarized waves in structures built of a Kerr-type nonlinear dielectric layer, metal and linear dielectric layers. Although these waves, called here ...

    Plasmonic hot-carrier optoelectronics 

    García de Arquer, Francisco Pelayo (Date of defense: 2015-02-18)

    The detection of light is of central importance in both fundamental science and applied technology. Photodetectors, which aim at transducing optical stimulus into measurable electrical signals, are ubiquitous to modern ...

    Polarized super-resolution fluorescence microscopy 

    Valadés Cruz, César Augusto (Date of defense: 2014-07-12)

    While super-resolution microscopy has brought a significant improvement in nano-scale imaging of molecular assemblies in biological media, its extension to imaging molecular orientation using fluorescence anisotropy has ...

    Polaron physics in carbon nanotube electro-mechanical resonators 

    De Bonis, Sergio Lucio (Date of defense: 2020-02-06)

    Carbon nanotube (CNT) mechanical resonators are unique systems because they combine remarkable mechanical properties with rich charge transport characteristics. Thanks to their intrinsically low-dimensional nature, their ...

    Preclinical and clinical studies in oncology and endocrinology with diffuse light 

    Fernández Esteberena, Pablo Ricardo (Date of defense: 2023-09-27)

    (English) Near-infrared diffuse optical spectroscopy (DOS) techniques are capable of non-invasive measurement of microvascular hemodynamic parameters of deep tissues (>1 cm penetration). One important focus of the field ...

    Quantifying nanoscale carrier diffusion with ultrafast optical and photocurrent microscopy 

    Block, Alexander (Date of defense: 2019-09-06)

    Heat transport in solids is one of the oldest problems in physics, dating back to the earliest formulations of thermodynamics. The classical laws of heat conduction are valid as long as the observed time and length scales ...

    Quantifying randomness from Bell nonlocality 

    Bourdoncle, Boris (Date of defense: 2019-02-13)

    The twentieth century was marked by two scientific revolutions. On the one hand, quantum mechanics questioned our understanding of nature and physics. On the other hand, came the realisation that information could be treated ...

    Quantitative nanoscale imaging of synaptic protein organization 

    Laparra Cuervo, Lara (Date of defense: 2018-03-28)

    The arrival of super-resolution techniques has driven researchers to explore biological areas that were unreachable before. Such techniques not only allowed the improvement of spatial resolution in images but also the ...

    Quantum Brownian motion in Bose-Einstein condensates 

    Charalambous, Christos (Date of defense: 2020-01-31)

    Quantum Brownian motion is one of the most prominent examples of an open quantum system, a system which cannot be treated in isolation from its environment. The simplest method to study the dynamics of a system undergoing ...

    Quantum Brownian motion revisited : extensions and applications 

    Lampo, Aniello (Date of defense: 2018-10-02)

    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 ...

    Quantum control of single spin excitations in cold atomic quantum memories 

    Albrecht, Boris (Date of defense: 2015-12-01)

    Optical quantum memories are important devices in quantum information science. In particular, they are building blocks of quantum repeater architectures that have been proposed to increase the range of quantum communication ...

    Quantum frecuency conversion for hybrid quantum networks 

    Maring, Nicolas (Date of defense: 2018-09-13)

    The ability to control the optical frequency of quantum state carriers (i.e. photons) is an important functionality for future quantum networks. It allows all matter quantum systems - nodes of the network - to be compatible ...

    Quantum gauge theory simulation with ultracold atoms 

    Zamora, Alejandro (Date of defense: 2014-12-15)

    The study of ultracold atoms constitutes one of the hottest areas of atomic, molecular, and optical physics and quantum optics. The experimental and theoretical achievements in the last three decades in the control and ...