Programa de Doctorat en Fotònica: Enviaments recents
Ara mostrant els elements 1-20 de 291
Tailoring the direction and polarization of mid-infrared thermal emission with van der Waals materials
(English) The mid-infrared spectral region holds significant potential for applications in energy harvesting and waste-heat recovery, radiative cooling, spectroscopy, sensing, thermal camouflage and night vision, among ...
Learning particle dynamics: from diffusion to interactions
(English) Understanding how a complex system works from its components, such as a virus invading a cell or particles aggregating in a liquid, is a fundamental question in the study of nature that provides great biological ...
Heating and decoherence due to light scattering in atomic media
(English) Cold atom platforms have become central to quantum technologies such as information processing, simulation, and metrology. Their versatility and high degree of control make them especially powerful. A key ...
Theoretical aspects of the interaction of free and tunneling electrons with low-dimensional photonic systems
(English) In this thesis, we provided a theoretical description of how focused electron beams interact with low-energy excitations and generate nanoscale light, which is of great interest in the field of nanophotonics. In ...
A variety of optimization techniques applied in the context of quantum information theory
(English) The thesis considers a number of optimisation techniques applied in the context of quantum information theory. After a pedagogical introduction of both quantum information theory and optimisation, it considers ...
Excitons in motion: linking structure and transport in energy materials
(English) The growing global energy demand, coupled with the need to reduce CO2 emissions, highlights the urgency of developing sustainable energy solutions. Despite its vast potential, solar energy remains underutilized ...
Exciton engineering for quantum confinement in an electrostatically defined PN-junction
(English) We investigate the physics of quantum-confined excitons in an electrostatically defined PN junction. Such a PN junction can be generated in an encapsulated monolayer MoSe2 along the patterned edge of a top-gate ...
Probing structural coherence across a light-induced double phase transition
(English) Strongly-correlated materials have emerged as one of the most active areas of research in Condensed Matter Physics. Interests in these materials arise mainly from the pliability of their properties, offering the ...
Bridging fast volumetric imaging and mechanical stimulation: a platform for studying mechanosensitive neurons functionality onset in C. elegans embryos
(English) In Caenorhabditis elegans, the embryo develops within the protective confines of an eggshell, shielded from direct interactions with the outside world. In this isolated environment, neuronal mechanosensory circuits, ...
Near-field photocurrent in correlated 2D moiré materials
(English) Since the discovery of graphene, two-dimensional (2D) materials have garnered significant attention from the condensed matter physics community owing to their potential to engineer new physical, optical, and ...
Quantum adventures from analog to digital: gauge, scars and laughlin
(English) This is a thesis in theoretical physics about analog quantum simulations, digital quantum simulations (quantum computing), and quantum state preparation using different quantum platforms (neutral atoms, trapped ...
Photon counting with a single neutral atom: quantum efficiency, dark counts, and background rejection
(English) This thesis studies the use of a single trapped neutral 87Rb atom as a photon counter. Detection of quantum jumps (QJs), i.e., abrupt changes between atomic states observable by a change in atomic fluorescence, ...
Nanocavities and molecules: polaritons and their dynamic interactions
(English) This thesis investigates light-matter interactions within plasmonic nanocavities, using ultra- confined optical environments to observe and control molecular dynamics at the nanoscale. Plasmonic cavities, formed ...
Compact phase imaging platform and its application to material science and manufacturing
(English) As the world moves towards increasingly miniaturized and complex technologies and devices, the need for imaging and metrology tools for precise material characterization and fabrication process control is rising ...
Single rare earth ions for quantum computing nodes
(English) Despite decades of research, practical quantum computing and long-distance quantum communication remain elusive, hindered by significant challenges in current platforms. Single rare earth ions (SREI) in the solid ...
Continuous variable quantum communications: technologies and security
(English) With this Thesis, we will focus on diverse technologies as well as techniques relevant for the development of secure communication systems based on Quantum Mechanics. This theoretical analysis involves the ...
Controlling the strong interaction between quantum emitters and plasmonic rod-dimers
(English) The growth of technology and climate change have increased the need for more efficient, biodegradable and ecologically sustainable electronic devices. With this in mind, different methods have emerged to improve ...
Fourier transform infrared spectroscopy of twisted bilayer graphene
(English) The goal of this thesis is to probe the infrared optical response of twisted bilayer graphene (TBG) using Fourier transform infrared spectroscopy (FTIR). First, I used a commercial FTIR to measure the TBG in the ...
Photonic based approaches to overcome intrinsic losses in organic solar cells
(English) The large dependence on fossil fuels led to a severe environmental crisis, evident in the acceleration of climate change caused by the greenhouse effect. This unsustainable model has led to a reassessment of our ...
Certifying quantum resources in many-body systems from accessible observables
(English) This thesis primarily aims at developing reliable theoretical tools to certify the preparation of entangled states and other quantum correlations in many-body systems from accessible observables. In doing so, we ...
