Now showing items 148-167 of 242

    Optical antennas for single emitters 

    Taminiau, Tim Hugo (Date of defense: 2011-11-22)

    The interaction of light with matter is a central topic in both fundamental science and applied technology. At the heart of this interaction lies the absorption or emission of a photon by an electronic transition in for ...

    Optical holographic microscopy for bio- and nanoparticle characterization 

    Ortiz de Orruño Cuesta, Unai (Date of defense: 2023-04-21)

    (English) Nowadays, being able to precisely characterize nanoparticles is of key relevance in a wide range of scenarios. For instance, chemical and pharmaceutical industries often rely in particle-sizing for quality control. ...

    Optical nanoantennas as cavities : nanoscale control of couplings strength and single photon emission 

    Singh, Anshuman (Date of defense: 2017-11-11)

    Optical nanoantennas confine light on the nanoscale, enabling strong light-matter interactions with potential for ultra-compact optical devices. Apart from the direct applications in optical nanoscopy and sensing, nanoantennas ...

    Optical parameter sensing: sensitivity limits and the advantages of using spatial modes of light 

    Villegas Juárez, Arturo (Date of defense: 2023-04-26)

    (English) Resolution enhancement in modern optical metrology techniques has been possible due to significant technological improvements. The accurate and precise control of wavelength, bandwidth, and power of light sources; ...

    Optical surfaces for mid-infrared sensing 

    Gopalan, Kavitha Kalavoor (Date of defense: 2018-10-22)

    The mid-infrared (mid-IR) spectral region, with wavelengths between 3 and 15 µm, is known for a wide range of applications ranging from spectroscopic sensing to thermal imaging. However, despite the strong technological ...

    Optimal signal recovery for pulsed balanced detection 

    Icaza Astiz, Yannik Alan de (Date of defense: 2015-01-27)

    To measure quantum features in a classical world constrains us to extend the classical technology to the limit, inventing and discovering new schemes to use the classical devices, while reducing and filtering the sources ...

    Optomechanical resonators based on low dimensional materials 

    Tepsic, Slaven (Date of defense: 2021-07-07)

    Mechanical resonators based on low dimensional materials have attracted a lot of attention due to their remarkable properties. Their ultra-low mass and high Q factors make them exceptional sensors, offering new possibilities ...

    Optomechanical resonators based on transition metal dichalcogenide monolayers 

    Morell Bennasser, Nicolás (Date of defense: 2018-12-17)

    Suspended monolayer transition metal dichalcogenides (TMD) aremembranes that combine ultralow mass and exceptional optical prop-erties, making them intriguing materials for opto-mechanical applica-tions. However, the low ...

    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 ...