Programa de Doctorat en Fotònica: Recent submissions
Now showing items 1-20 of 282
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 ...
X-ray absorption fine structure with attosecond soft X-ray pulses for condensed matter physics
(English) Understanding electron behavior in solids and their interactions with the lattice is crucial for exploring exotic phenomena in condensed matter. Traditional techniques often provide limited insights, focusing on ...
A non-linear carbon nanotube mechanical resonator near the quantum ground state of motion
(English) This thesis describes the design, fabrication, and measurement of gate-defined quantum dots embedded in suspended carbon nanotubes. The mechanical vibrations of the nanotube couple strongly to the quantum dots ...
Quantum-gas microscopy of strontium Bose- and Fermi-Hubbard systems
(English) Ultracold atoms have proven to be a valuable asset to study and understand complex quantum many-body systems in a well-controlled setting. In particular, quantum-gas microscopes provide unprecedented access to ...
Advanced nanoantenna platforms for enhanced single-molecule detection at high concentrations
(English) The ability to study the dynamics of individual biomolecules is crucial to understanding the complex organization of biological systems beyond what can be learned from ensemble averages. These single-molecule ...
Use of advanced imaging tools for assessing the performance of novel therapeutic techniques for restoring vision
(English) Studying vision restoration is paramount for addressing degenerative blinding diseases, which significantly impact quality of life and public health. With more than 230M people worldwide affected by moderate to ...
Certification in quantum information theory: key distribution, self-testing and entanglement
(English) In the beginning of the last century, we witnessed a change of paradigm in how physics described the world with the formulation of quantum mechanics. This new theory shook the pillars of science by setting ...
Graphene based photodetectors for on-chip and free-space data communication applications
(English) Moore's law, a longstanding guide for the semiconductor industry, successfully predicted the exponential growth in computing power by doubling transistor counts every two years. However, recent challenges in ...
Introducing tools to quantify the performance of quantum computing algorithms and their applications
(English) In this thesis, I focused on introducing tools to quantify the performance of quantum computing algorithms and their applications. The main focus is on two of the most popular application areas of quantum computing, ...
Interactions and optical properties of microorganisms on surfaces
(English) Controlling microbial growth is essential to industries such as healthcare, food, pharmacy but also for ship hulls and water systems. Interactions of bacteria with surfaces are highly dynamic and complex. Once a ...
