Browsing by Contributor "Cojocaru, Crina"
Now showing items 21-33 of 33
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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 -
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 ... -
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 ... -
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
Restricted access - confidentiality agreement -
Surface and bulk harmonic generation in the opaque region of GaAs
(Universitat Politècnica de Catalunya, 2018-09-06)
Master thesis
Open AccessWe demonstrate second and third harmonic generation from a GaAs substrate, far from the phase matching and well-below the absorption edge, in both transmission and reflection geometries. The pump is tuned in the transparency ... -
Ultra short laser pulse characterization device based on disordered nonlinear crystals
(Universitat Politècnica de Catalunya, 2017-10-27)
Master thesis
Open Access
Covenantee: Institut de Ciències Fotòniques (ICFO) / Universitat de Barcelona / Universitat Autònoma de BarcelonaIn this project we build and test a compact and portable optical device for ultrashort pulse characterization. This setup allows the measurement of the pulse duration as well as its chirp parameter by using the so called ... -
Ultra-short pulse characterization, a new in-situ approach using disordered nonlinear crystals
(Universitat Politècnica de Catalunya, 2014-09-10)
Master thesis
Open Access[ANGLÈS] A new single-shot assembly for ultra-short laser pulse characterization using ferroelectric crystals with inverted randomly distributed nonlinear domains is studied in detail. The second harmonic autocorrelation ...
