Browsing by Contributor "Cojocaru, Crina"
Now showing items 21-40 of 43
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Exploring NbTiN superconducting single photon detectors with quantum detector tomography
(Universitat Politècnica de Catalunya, 2019-09-09)
Master thesis
Open AccessThe optical response of NbTiN superconducting single photon detectors is studied using quantum detector tomography which separates the detector response in single and multiple photon contributions. Three different NbTiN ... -
Hybrid non-destructive technique for volumetric defect analysis and reconstruction by remote laser induced ultrasound
(Universitat Politècnica de Catalunya, 2020-07-21)
Doctoral thesis
Open AccessThis PhD thesis is devoted to the design, development and implementation of a non-contact hybrid non-destructive testing (NDT) method applied to the analysis of metallic objects that contain embedded defects or fractures. ... -
Internal alignment of the Wide Field Monitor instrument within the eXTP X-ray Satellite
(Universitat Politècnica de Catalunya, 2024-07-11)
Master thesis
Open AccessThe Wide Field Monitor (WFM) is a wide field X-ray monitor in the (2-50) keV energy range onboard the Chinese-led eXTP (enhanced X-ray Timing and Polarimetry mission) Satellite. It consists of six identical coded mask ... -
Investigation of the light propagation in the human forearm
(Universitat Politècnica de Catalunya, 2017-09-08)
Master thesis
Open Access
Covenantee: Universität UlmIn the present study it is investigated the applicability of spectrally resolved reflectance at a certain distance from the incident beam to determine the optical coefficients of multi-layered tissues. The main motivation ... -
Light localization in photonic crystals
(Universitat Politècnica de Catalunya, 2024-07-23)
Master thesis
Restricted access - confidentiality agreement -
Light scattering self-assembled nanostructures for optoelectronic devices
(Universitat Politècnica de Catalunya, 2018-06)
Bachelor thesis
Restricted access - author's decision
Covenantee: Karlsruher Institut für Technologie. Licht nutzen und erforschen -
Method for the objective characterization of the structural properties of biomedical images
(Universitat Politècnica de Catalunya, 2024-09-09)
Master thesis
Restricted access - confidentiality agreement -
Modelling of general relativity phenomena with photonics
(Universitat Politècnica de Catalunya, 2014-07-18)
Master thesis
Open Access[ANGLÈS] Metamaterials are man-made artificial materials whose electromagnetic parameters the permittivity and permeability are determined by its internal structure rather than their substance. An analogy between the ... -
Non-Gaussian quantum states generation on thin film lithium niobate platform
(Universitat Politècnica de Catalunya, 2024-07-09)
Bachelor thesis
Open Access
Covenantee: Université Paris-SaclayLight can be described by Gaussian statistics and the ability to shape its quantum states is essential for the development of quantum information field. In order to enhance quantum information tasks performance, we must ... -
Nonlinear frequency conversion in strategic materials for nanophotonics
(Universitat Politècnica de Catalunya, 2021-09-09)
Master thesis
Restricted access - confidentiality agreement
Covenantee: Karlsruher Institut für TechnologieThis project aims to contribute to two important research areas in Photonics: nonlinear optics and sub-wavelength nano-structured optical materials (nanomaterials). These inter-connected fields have major applications in ... -
Nonlinear frequency conversion under general phase mismatched condition: the role of phase locking and random nonlinear domains
(Universitat Politècnica de Catalunya, 2011-06-15)
Doctoral thesis
Open AccessIn the field of second harmonic (SH) generation most studies have been concerned with maximizing conversion efficiencies, generally achievable at the phase matching (PM) condition. Outside of the PM the conversion efficiency ... -
Nonlinear optics at nanoscale: frequency conversion at interfaces
(Universitat Politècnica de Catalunya, 2023-06-19)
Doctoral thesis
Open Access(English) The use of semiconductors, metals, or ordinary dielectrics in the process of fabrication of nanodevices is at the front edge of nowadays technology. In the last decade an impressive technological progress has ... -
Novel stabilizers for P3HT:ICBA nanoparticle dispersions
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
Restricted access - confidentiality agreementNovel additives have been used to the stabilization of P3HT:ICBA nanoparticle dispersions. Said additives were not reducing the efficiency of organic solar cells built from the stabilized dispersions. -
Photonic lab-on-a-chip containing microbial-based alginate light waveguides for phenolic compounds determination.
(Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2014-09-08)
Master thesis
Open Access[ANGLÈS] Phenolic compounds are one of the main causes of environmental pollution of soils and water for their toxicity and persistence. Currently, phenolic compounds detection is principally done with bulky and expensive ... -
Second harmonic generation in disordered nonlinear crystals : application to ultra-short laser pulse characterization
(Universitat Politècnica de Catalunya, 2017-10-10)
Doctoral thesis
Open Access
Covenantee: Aix-Marseille UniversitéThe PhD project, entitled "Second harmonic generation in disordered nonlinear crystals: application to ultra-short laser pulse characterization", is devoted to the study of second harmonic generation in nonlinear ferroelectric ... -
Shaping of light beams with photonic crystals : spatial filtering, beam collimation and focusing
(Universitat Politècnica de Catalunya, 2014-07-01)
Doctoral thesis
Open AccessThe research developed in the framework of this PhD thesis is a theoretical, numerical and experimental study of light beam shaping (spatial filtering, beam collimation and focusing) in the visible frequency range using ... -
Spectroscopic characterization of Er3+, Yb3+ co-doped UC single crystals : the influence of host and sensitizer concentrations
(Universitat Politècnica de Catalunya, 2018-10-24)
Master thesis
Open Access
Covenantee: Bundesanstalt für Materialforschung und -prüfungThe energy transfer upconversion (ETU) mechanism is known to be the most efficient route for the conversion of near infrared (NIR) light to visible emission in Ln3+-co-doped systems. In this work, we examined these energy ... -
Study of hybrid silicon/III-V photonic crystal nanolasers
(Universitat Politècnica de Catalunya, 2021-07-06)
Bachelor thesis
Open Access
Covenantee: Université Paris-SaclayAt a time when computing resources, telecommunication requirements and data processing are exploding worldwide, nanophotonics has emerged in the last decade as an important tool that, together with microelectronics, provides ... -
Study of the enhancement of absorption in photonic nanostructures
(Universitat Politècnica de Catalunya, 2022-09-09)
Master thesis
Open Access -
Study of the wavelength dependent light localization in 3D chirped photonic structures
(Universitat Politècnica de Catalunya, 2023-07-11)
Bachelor thesis
Restricted access - confidentiality agreementOptical properties of photonic crystals have emerged as being pivotal in the field of nanophotonics. Their artificial periodicity can alter and create new effective dispersion relations compared to bulk materials, allowing ...
