Now showing items 12-31 of 242

    Cavity optomechanics with optically trapped particles 

    Mestres Junqué, Pau (Date of defense: 2017-09-07)

    Optical trapping and manipulation have emerged as powerful tools to investigate single microscopic objects in a controlled environment. Using the momentum carried by light, forces can be exerted to confine and manipulate ...

    Certification of many-body systems 

    Baccari, Flavio (Date of defense: 2019-05-17)

    Quantum physics is arguably both the most successful and the most counterintuitive physical theory of all times. Its extremely accurate predictions on the behaviour of microscopic particles have led to unprecedented ...

    Characterizing and witnessing multipartite correlations : from nonlocality to contextuality 

    Sainz, Ana Belén (Date of defense: 2014-02-10)

    In the past century, experimental discoveries have witnessed phenomena in Nature which challenge our everyday classical intuition. In order to explain these facts, quantum theory was developed, which so far has been able ...

    Characterizing entanglement and quantum correlations constrained by symmetry 

    Tura i Brugués, Jordi (Date of defense: 2015-07-20)

    Entanglement and nonlocal correlations constitute two fundamental resources for quantum information processing, as they allow for novel tasks that are otherwise impossible in a classical scenario. However, their elusive ...

    Charge carrier dynamics and interfaces in perovskite solar cells 

    Rueda Delgado, Diana Paola (Date of defense: 2019-07-30)

    Organometal halide perovskites for solar cells are hybrid semiconductors that recently have caught the attention of the scientific community due to its excellent performance and attractive optical properties. Since then, ...

    Classical and quantum aspects of the optical response at the nanoscale 

    Martínez Saavedra, José Ramón (Date of defense: 2018-12-10)

    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 ...

    Coherent control of nonlinear optical processes in individual nanoparticles 

    Accanto, Nicolò (Date of defense: 2016-06-16)

    Nanophotonics aims to understand and control the interaction of light-matter at the nanometer scale. Boosted by the development of nanotechnology and nanofabrication, nanophotonics is a thriving research field, with ...

    Coherent sensing of magnetic waveforms with spin-squeezed atoms 

    Martin Ciurana, Ferran (Date of defense: 2017-12-14)

    Optical magnetometers use magnetically-sensitive atomic ensembles and optical read-out to detect the amplitude of magnetic fields. They have become the most sensitive instruments for measuring low-frequency magnetic fields ...

    A cold-atom approach to topological quantum matter across the energy scale 

    González Cuadra, Daniel (Date of defense: 2020-12-11)

    The outstanding progress achieved in the last decades to isolate and manipulate individual quantum systems has revolutionized the way in which quantum many-body phenomena, appearing across Nature's different energy scales, ...

    Complex systems for quantum technologies 

    Braungardt, Sibylle (Date of defense: 2011-07-12)

    Continuous-wave optical parametric oscillators and frequency conversion sources from the ultraviolet to the mid-infrared 

    Devi, Kavita (Date of defense: 2013-10-24)

    High-power, continuous-wave (cw) optical parametric oscillators (OPOs), from the ultraviolet (UV) and visible to the near- and mid-infrared (IR) wavelength range, are of interest for a variety of applications such as ...

    Contributions to nanophotonics: linear, nonlinear and quantum phenomena 

    Roque Fernández, Pablo Manuel de (Date of defense: 2022-10-18)

    (English) Nanophotonics can be defined as the science and technology studying the control optical fields at the nanoscale and their interaction with matter. In order to spatially control such fields we would need structures ...

    Control of optical fields and single photon emitters by advanced nanoantenna structures 

    Neumann, Lars (Date of defense: 2012-04-18)

    Un tema central en la ciencia y la tecnología es la exploración y explotación de sistemas cada vez más pequeños por medio de técnicas ópticas. A menudo, la longitud de onda viene dictada por el sistema de interés: los ...

    Controlling interactions in quantum materials : from a microscopic description to quantum simulation 

    Julià Farré, Sergi (Date of defense: 2022-06-28)

    The last decades have witnessed impressive technical advances in all the fields of quantum science, including solid-state systems or atomic, molecular, and optical physics, allowing one to control materials at the microscopic ...

    Controlling the multipolar interference of nanoantennas 

    Hancu, Ion Michael (Date of defense: 2019-01-18)

    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, ...

    Copper indium sulfide colloidal quantum dot solar cells 

    So, David (Date of defense: 2016-10-19)

    The ubiquity of solar energy conversion technology is an exciting target which we aspire for in this century. Colloidal quantum dot (CQD) solar cells are an attractive platform, being low-cost and allowing facile control ...

    Correlates of cerebral vasoreactivity measured by non-invasive diffuse optical measurements as biomarkers of brain injury risk 

    Gregori Pla, Clara (Date of defense: 2019-03-06)

    I have used and developed a practical new platform in the clinics for the noninvasive estimation of cerebral hemodynamics. The latform combines two diffuse optical techniques: near-infrared spectroscopy and diffuse ...

    Demonstration of new experimental schemes for imaging and sensing: from quantum to classical and back 

    Urrego González, Daniel Fernando (Date of defense: 2023-11-14)

    (English) This Ph.D. thesis presents research in imaging and optical sensing, exploring novel concepts, and diverse applications. The experimental schemes put forward here are based on simulating specific aspects of quantum ...

    Desarrollo y validación de una plataforma optofluídica ultrasensible para la detección especifíca y selectiva de mercadores tumorales en oncología 

    Ortega. M, María A. (Date of defense: 2015-11-11)

    Nowadays cancer is a devastating illness, so its early diagnosis could represent a powerful advantage in the struggle to eradicate it. The most recent technologies allowed the development of sensing platforms that led to ...

    Detection of a single erbium ion in a nanoparticle 

    Deshmukh, Chetan (Date of defense: 2022-04-29)

    Encoding information into quantum mechanical properties of a system can lead to applications many fields, including computing and communication. Devices that will enable these applications could be part of a quantum network ...