Programa de Doctorat en Fotònica: Recent submissions
Now showing items 21-40 of 268
Comprehensive monitoring of the injured brain by hybrid diffuse optics: towards brain-oriented theranostics
(English) In the intensive care, the multimodal monitoring of the patient is crucial. The systemic physiology is routinely and comprehensively monitored but the practical monitoring of the brain is lacking. Hybrid diffuse ...
Optimization and geometry for quantum information tasks
(English) In this thesis, we study the optimization of operational tasks that involve the manipulation of quantum resources. In most cases, such optimizations are aided by understanding the geometric properties of the ...
Information and thermodynamics
(English) The modern understanding of physics is deeply linked with the concept of information. The revival of the study of quantum mechanics in the form of quantum information is just an example of a more general trend ...
Cavity-enhanced non-destructive measurements of atomic magnetism
(English) In this work we propose and demonstrate cavity-enhanced polarization rotation to detect magnetic effects in transparent media with greater sensitivity at equal optical disturbance to the atomic medium. We use the ...
Harnessing quantum dynamics: heat engines, negative temperatures, and dynamical spectroscopy
(English) n this thesis, our main objective is to utilize different kinds of quantum dynamics as resources. To do so, we investigate thermodynamics, non-equilibrium steady states, and dynamical spectroscopy in order to ...
Exploring graphene artificial superlattices and hydrodynamic plasmons
(English) Graphene has revolutionized the field of condensed matter physics over the last two decades, emerging as an outstanding research platform. This is because graphene electrons behave as massless Dirac fermions, ...
Application and development of diffuse optical methods for the non-invasive bedside assessment of cerebral hemodynamics in the stroke unit
(English) The brain is an organ with a large energy budget compared to its volume and weight and constantly requires oxygen-rich blood to meet its metabolic needs. Given this fact, a tool that enables the continuous ...
Light-matter entanglement between telecom photons and solid-state quantum memories
(English) Future networks for quantum communication will require a new form of technology in order to operate over long distances. The no-cloning theorem precludes the use of amplification, so quantum repeater schemes have ...
Investigation of the interaction driven quantum phases in magic-angle twisted bilayer graphene
(English) The discovery of two dimensional materials opened a unique pathway to study the electronic properties of quantum materials which are otherwise absent in bulk systems. Soon after the discovery of graphene (2004), ...
Reconfigurable metasurfaces based on thermo-optical and optomechanical controls
(English) Optical metasurfaces established themselves as potential platform for planar and integrated optics. Progress in the material sciences and fabrication process paves the way towards ultra-thin metasurface based ...
A liquid-to-solid transition governs neuronal mechanotransduction during touch in Caenorhabditis elegans
(English) In recent years, our understanding of the ion channels and receptors that orchestrate the conversion of physical stimuli into physiological signals has deepened significantly. Nevertheless, there remains some ...
Hybrid diffuse optics methods to assess the emergence of dementia in older adults
(English) Hybrid diffuse optical devices offer a non-invasive and continuous and cost-effective method for monitoring cerebral blood flow and metabolism on the bedside use and realistic simulation applications. The ...
A machine learning ride in the physics theme park: from quantum to biophysics
(English) The integration of artificial intelligence into research is propelling progress and discoveries across the entire scientific landscape. Artificial intelligence tools boost the development of novel scientific ...
Remote distribution of quantum states assisted by multimode quantum memories
(English) The future quantum Internet will allow the transfer of quantum states between remote locations. However, bridging large distances is a challenging task due to losses in optical fibres. A promising approach to ...
Colloidal quantum dots based bolometers
(English) Bolometer technology, crucial for uncooled thermal detection in thermography, industrial inspection, monitoring, and surveillance applications, relies on thermistors primarily made of VOx, a-Si, and Si/SiGe QWs ...
Optically detected nuclear magnetic resonance above and far below earth's magnetic field: spin dynamics and relaxation in unconventional regimes
(English) This thesis describes theoretical background, simulations, experimental apparatus and measurements of nuclear spin dynamics via optically pumped magnetometers in unconventional magnetic field regimes. It is divided ...
Theoretical models for quantum simulators of novel materials and devices
(English) Over the past three decades, optically trapped ultra-cold atoms have served as a versatile platform for controlled exploration of numerous condensed matter phenomena. The successful fabrication of magic angle ...
Transparent surfaces based on ultrathin materials with tailored optical and biological functionalities
(English) The properties of ultrathin materials present exciting opportunities to develop multifunctional surfaces. In addition, the use of plastic and thin glass as transparent substrates has the potential to extend the ...
Nonlinear optics with a Rydberg ensemble for quantum information processing purposes
(English) Photons have emerged as the main candidates for carrying quantum information due to their weak interaction with the environment. Unfortunately, their limited interaction with one another poses challenges for ...
Vibrations and energy transfer in molecules enhanced by single nanoantennas
(English) Light is a powerful non invasive tool for probing matter down to its fundamental molecular properties. The past three decades saw advent of metallic nanoantennas engineered to concentrate light into sub diffraction ...
