Tesis sobre el tema "Couches optiques"
Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros
Consulte los 50 mejores tesis para su investigación sobre el tema "Couches optiques".
Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.
También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.
Explore tesis sobre una amplia variedad de disciplinas y organice su bibliografía correctamente.
Michel, Sébastien. "Vers une détermination optique directe des coefficients opto-mécaniques et thermo-optiques des couches minces optiques". Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2008. http://tel.archives-ouvertes.fr/tel-00330005.
Texto completoChaton, Patrick. "Caractérisation des couches minces optiques, amélioration des modèles de couches". Aix-Marseille 3, 1991. http://www.theses.fr/1991AIX30085.
Texto completoFuchs, Adam. "Applications optiques de couches minces de chalcogénures". Grenoble INPG, 2005. http://www.theses.fr/2005INPG0013.
Texto completoErbium-doped As-S, As-Se and Ge-As-Se layers were obtained with RF sputtering. A morphological study showed the presence of homogeneous structures for As-S and As-Se layers and column-like structures for Ge-As-Se layers. The Photoluminescence (PL) at 1,55 µm was detected in free-space configuration for all compositions. The PL was also observed in guided configuration for As-S layers. Channel waveguides and optical gratings fabrication was made with Ag photo-doping. Wet etching was also used to fabricate channel waveguides. Waveguiding properties at 1,55 µm were observed
Leplan, Herve. "Les contraintes dans les couches minces optiques". Grenoble INPG, 1995. http://www.theses.fr/1995INPG0126.
Texto completoArmand, Marilyn. "Etude de couches magnétiques couplées pour disques optiques". Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10216.
Texto completoLeroy, Floriane. "Etude des propriétés électro-optiques des couches minces de Ba1-xSrxTiO3 pour la modulation optique". Phd thesis, Université de Valenciennes et du Hainaut-Cambresis, 2012. http://tel.archives-ouvertes.fr/tel-00749716.
Texto completoVolto, Patricia. "Etude de l'endommagement laser dans les couches minces optiques". Aix-Marseille 3, 1998. http://www.theses.fr/1998AIX30099.
Texto completoBearzi, Eric. "Caractérisations électro-optiques de couches AlInAs epitaxiées sur InP". Lyon, INSA, 1996. http://www.theses.fr/1996ISAL0100.
Texto completoThe AlInAs material thanks to his electrical and optical properties, especially the high discontinuity of the conduction band at the heterointerface AlInAs/GaInAs, has become a key material for the realisation of optoelectronics and hyperfrequencies devices at heterojunction. The optimum results of performances and devices needs the control of the material growth and a precise knowledge of its defects. We have begun a study on the AllnAs electrical and optical properties according to its growth conditions. We have explained the semi-insulating characteristics of the layers grown by Molecular Bearn Epitaxy at low temperature. The carriers trapping occurs at a level called H2 which is induced by the extended defects of the material. The optical properties have also been studied according to the growth conditions. We have demonstrated that, on special conditions, a disordered superlattice appears in the material and strongly affects the measurements
El-Yadouni, Abderrazzak. "Étude par optique guidée des propriétés optiques linéaires et non linéaires de couches minces de semi-conducteurs à grand gap". Metz, 2002. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2002/El_Yadouni.Abderrazak.SMZ0228.pdf.
Texto completoEl-Yadouni, Abderrazzak Loulergue Jean-Claude. "Etude par optique guidée des propriétés optiques linéaires et non linéaires de couches minces de semi-conducteurs à grand gap". Metz : Université Metz, 2008. ftp://ftp.scd.univ-metz.fr/pub/Theses/2002/El_Yadouni.Abderrazak.SMZ0228.pdf.
Texto completoViard, Jocelyn. "Caractérisations de couches minces d'oxynitrures de silicium élaborées par PECVD". Montpellier 2, 1996. http://www.theses.fr/1996MON20034.
Texto completoMangote, Benoit. "Tenue au flux des couches minces optiques en régime subpicoseconde". Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2011. http://tel.archives-ouvertes.fr/tel-00664545.
Texto completoJEBARI, MOHAMED MONDHER. "Etude des proprietes optiques de couches metalliques deposees a froid". Paris 6, 1990. http://www.theses.fr/1990PA066178.
Texto completoLottiaux, Michel. "Caractérisation des couches minces d'oxyde de titane pour filtres optiques". Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30103.
Texto completoLottiaux, Michel. "Caractérisation de couches minces d'oxyde de titane pour filtres optiques". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376074365.
Texto completoCarlberg, Miriam. "Modélisation, réalisations et caractérisations optiques de couches hétérogènes à nanoparticules". Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0297/document.
Texto completoNoble metal nanoparticles (NPs) have a broad range of applications thanks to their extraordinary optical, chemical and electrical properties. The optical properties are driven by their ability to support localized surface plasmon resonances, which induce enhanced absorption and scattering at their resonance wavelengths in the visible spectrum. These size and shape dependent optical properties are taken advantage of in the search for a thin film layer perfect absorber in the visible wavelength band. The application for such thin film layers with engineered optical properties ranges from photodetectors, over thermal solar cells to stealth applications.Recent progress in colloidal NP synthesis makes the chemical wet synthesis of silver nanospheres, nanocubes and nanoprisms of various sizes easily feasible. The different NPs are then randomly deposited in a transparent and non-absorbing host matrix for optical characterizations. Computer simulations validate the experimental results and allow a visualization of the phenomena occurring at the nanoparticle scale.This PhD thesis reports the chemical synthesis of the different nanoparticles and their optical characterizations. Spectroscopic ellipsometry measurements are performed on single shape NPs, blends and multilayer stacks. A simple diffusion model, composed of a single Cauchy law and one or several Gauss laws, is chosen to determine the complex optical indices. The comparison of the extinction coefficients of the different layers shows that the optical properties of each NP are simply added in the blend and multilayer samples. Computer simulations relate this to the low density of nanoparticles
Carlberg, Miriam. "Modélisation, réalisations et caractérisations optiques de couches hétérogènes à nanoparticules". Electronic Thesis or Diss., Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0297.
Texto completoNoble metal nanoparticles (NPs) have a broad range of applications thanks to their extraordinary optical, chemical and electrical properties. The optical properties are driven by their ability to support localized surface plasmon resonances, which induce enhanced absorption and scattering at their resonance wavelengths in the visible spectrum. These size and shape dependent optical properties are taken advantage of in the search for a thin film layer perfect absorber in the visible wavelength band. The application for such thin film layers with engineered optical properties ranges from photodetectors, over thermal solar cells to stealth applications.Recent progress in colloidal NP synthesis makes the chemical wet synthesis of silver nanospheres, nanocubes and nanoprisms of various sizes easily feasible. The different NPs are then randomly deposited in a transparent and non-absorbing host matrix for optical characterizations. Computer simulations validate the experimental results and allow a visualization of the phenomena occurring at the nanoparticle scale.This PhD thesis reports the chemical synthesis of the different nanoparticles and their optical characterizations. Spectroscopic ellipsometry measurements are performed on single shape NPs, blends and multilayer stacks. A simple diffusion model, composed of a single Cauchy law and one or several Gauss laws, is chosen to determine the complex optical indices. The comparison of the extinction coefficients of the different layers shows that the optical properties of each NP are simply added in the blend and multilayer samples. Computer simulations relate this to the low density of nanoparticles
Joerg, Alexandre. "Couches minces photosensibles pour la réalisation d'éléments optiques diffractifs et de filtres optiques interférentiels spatialement structurés". Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4346/document.
Texto completoIn recent years, there has been a tremendous progress in the complexity of thin film optical filters but also an important improvement in the deposition techniques. However, some filters require ultimate performances especially in terms of uniformity and absolute position of their spectral responses. Achieving these characteristics requires a precise and local control of the optical thickness of each of the layers. To overcome some of these fabrication constraints, the use of a material which index of refraction or thickness can be locally changed after deposition is an attractive solution. The chosen material is a chalcogenide glass : AMTIR-1, a commercial glass which refractive index decreases when exposed to light source. Thin films of this material were deposited by electron beam deposition and optical properties were characterized by spectrophotometric measurements. Photo-induced refractive index changes of ~ 4.10-2 were recorded at λ = 1 μm. These refractive index variations were then used to fabricate spatially structured thin films. In particular, diffractive optical elements were recorded in the volume of a thick chalcogenide single layer. This is performed by structured exposure using an optical arrangement based on a digital micromirror device. A close to perfect agreement between theory and experiment has been obtained. The insertion of these chalcogenide-based photosensitive layers in multilayer optical interference filters has also been investigated. A demonstration of the local control of the spectral response of a Fabry-Perot bandpass filter was performed, demonstrating the potential of this new approach for the production of optimized optical components
Ndiaye, Cesaire. "Exaltation optique génte dans les filtres interférentiels : Modélisation, Optimisation et Réalisation". Ecole centrale de Marseille, 2012. http://www.theses.fr/2012ECDM0006.
Texto completoAbel-Tiberini, Laëtitia. "Filtres interférentiels à propriétés optiques spatialement maitrisées". Aix-Marseille 3, 2005. http://www.theses.fr/2005AIX30037.
Texto completoOptical properties of thin films depend on thickness of each layer. All coatings technologies result in a non uniform thickness distribution. This distribution must be controlled to ensure the uniformity or, on the other side, to spatially modulate optical properties. This requires the development of two tools. The first one is a model which describes the coated thickness distribution, as the second one is an optical set-up for spectrally and spatially resolved measurement of samples. A fit of this model on the measurement of a single layer of each material, allow us to optimise the configuration of the coating chambers for any kind of applications. In this way, we demonstrate how the tilt of the substrate allows us to improve the uniformity. On the contrary, we propose a mechanism to perform a straight iso-thickness lines variable filter by the mean of a mask. In this last case, the model allows us to define the mask translation law
Cardin, Julien. "Elaboration et caractérisation de couches minces ferroélectriques pour des applications optiques". Phd thesis, Université de Nantes, 2004. http://tel.archives-ouvertes.fr/tel-00090784.
Texto completoKoperski, Maciej. "Propriétés optiques des couches minces de dichalcogénures de métaux de transition". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY019/document.
Texto completoThe research reported in the thesis entitled ‘Optical properties of thin layers of transition metal dichalcogenides’ focuses on physical phenomena which emerge in the limit of two-dimensional (2D) miniaturisation when the thickness of fabricated films reaches an atomic scale. The importance of such man-made structures has been revealed by the dynamic research on graphene: a single atomic plane of carbon atoms arranged in honeycomb lattice. Graphene is intrinsically gapless and therefore mainly explored with respect to its electric properties. The investigation of semiconducting materials which can also display the hexagonal crustal structure and which can be thinned down to individual layers, bridges the concepts characteristic of graphene-like systems (K-valley physics) with more conventional properties of semiconductors. This has been indeed demonstrated in a number of recent studies of ultra-thin films of semiconducting transition metal dichalcogenides (sc-TMD). Particularly appealing, from the point of view of optical studies, is a transformation of the bandgap alignment of sc-TMD films, from the indirect bandgap bulk crystals to the direct bandgap system in single layers. The presented thesis work provides a comprehensive optical characterisation of thin structures of sc-TMD crystals. The manuscript is divided into five parts: three main chapters with a preceding introduction and the appendix reporting the supplementary studies of another layered material: hexagonal boron nitride.Introduction. The fundamental properties of the investigated crystals are presented, especially those which are important from the point of view of optical studies. The discussion includes information on the crystal structure, Brillouin zone and electronic band structure. Also, the general description of the samples’ preparation process and experimental set-up is provided.Chapter 1. Basic optical characterisation of excitonic resonances in mono- and multi-layers of sc-TMDs. The optical response, as seen in the reflectance and luminescence spectra of thin sc-TMDs is analysed (mostly for MoSe2 and WSe2 materials). The impact of the number of layers and temperature on the optical resonances is studied and interpreted in details. The complementary time-resolved study is also presented.Chapter 2. Zeeman spectroscopy of excitonic resonances in magnetic fields. The evolution of the optical resonances in an external magnetic field, applied perpendicularly to the layers of sc-TMD materials is investigated. Based on these results, a phenomenological model is developed aiming to describe the linear with magnetic field contributions to the energy of individual electronic states in fundamental sub-bands of sc-TMD monolayers. Furthermore, the effects of optical pumping are investigated in WSe2 monolayers, which can be tuned by tiny magnetic fields.Chapter 3. Single photon sources in thin sc-TMD flakes. The discovery of localised narrow lines emitting centres has been in thin sc-TMD flakes is presented. An investigation of their fundamental properties is discussed. This includes the measurements of temperature and magnetic field evolution of the photoluminescence lines, and the analysis of the polarisation properties and the excitation spectra as well as photon correlation measurements.Appendix A. Single photon emitters in boron nitride crystals. Hexagonal boron nitride also belongs to the family of layered materials, but it exhibits much larger band gap than semiconducting transition metal dichalcogenides. A narrow lines emitting centres has been observed in boron nitride structures, which reveal multiple similarities to defect centres in wide gap materials. They are characterised in a similar manner as the emitting centres in WSe2
Abani, Mohaidine. "Préparation et étude de couches minces semiconductrices pour application électro-optiques". Bordeaux 1, 1988. http://www.theses.fr/1988BOR10555.
Texto completoFlory, François. "Corrélation entre la microstructure et les propriétés optiques des couches multiélectriques". Aix-Marseille 3, 1987. http://www.theses.fr/1987AIX30044.
Texto completoPENISSARD, GILLES. "Effets magneto-optiques de structures en couches ultra-minces au-co". Paris 11, 1993. http://www.theses.fr/1993PA112193.
Texto completoCardin, Julien. "Élaboration et caractérisation de couches minces ferroélectriques pour des applications optiques". Nantes, 2004. http://www.theses.fr/2004NANT2048.
Texto completoLead zirconate titanate (PZT) ferroelectric thin films were elaborated on glass substrates by chemical solution deposition in the aim to realize integrated waveguide structures. In order to determine the refractive index and the thickness of the films, an M-lines spectroscopy experimental device was set up. Particular attention was given to the analysis of the results and possible error sources. This led us to establish an indexing criterion of the propagation modes, the efficiency of which was proven by numerical simulations. An optimization method was developed which allows the determination of the refractive index and the thickness of the films with a relative accuracy of 10-3. The M-lines characterization method was applied in order to study the influence of the PZT elaboration procedure on the refractive index. Linear and Mach-Zehnder type waveguides were realized by photolithography and wet chemical etching, light guiding along several tens of millimeters was demonstrated
HAAG, HERVE. "Proprietes optiques non-lineaires de couches epitaxiees de nitrure de gallium". Université Louis Pasteur (Strasbourg) (1971-2008), 1999. http://www.theses.fr/1999STR13154.
Texto completoFlory, François. "Corrélation entre la microstructure et les propriétés optiques des couches multidiélectriques". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb37605115w.
Texto completoMaythaveekulchai, Nopparat. "Etude des coefficients thermoréfractifs et photoréfractifs de matériaux diélectriques en couches minces, par l'analyse du comportement des lignes de mode obtenues avec le coupleur à prisme". Aix-Marseille 3, 1991. http://www.theses.fr/1991AIX30077.
Texto completoLiu, Xu. "Mesures de déflexion photothermique pour l'étude de la propagation guidée dans les couches minces : étude théorique et expérimentale de l'atténuation". Aix-Marseille 3, 1990. http://www.theses.fr/1990AIX30024.
Texto completoRigneault, Hervé. "Perturbations photo-induites dans les couches minces diélectriques soumises à un flux laser de puissance". Aix-Marseille 3, 1993. http://www.theses.fr/1993AIX30074.
Texto completoCommandré, Mireille. "Caractérisation de l'absorption dans les composants optiques en couches minces par déflexion photothermique". Aix-Marseille 3, 1992. http://www.theses.fr/1992AIX30074.
Texto completoDemange, Valérie. "Seléction, élaboration et caractérisation d'alliages et de couches minces approximants Al-Cr-Fe". Vandoeuvre-les-Nancy, INPL, 2001. http://www.theses.fr/2001INPL568N.
Texto completoBadoil, B. "CONTROLE SPECTROPHOTOMETRIQUE LARGE BANDE DE FILTRES INTERFERENTIELS EN COURS DE DEPOT". Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2007. http://tel.archives-ouvertes.fr/tel-00472428.
Texto completoLuthier, Roland. "Propriétés structurales et optiques de couches minces composites déposées par pulvérisation cathodique /". [S.l.] : [s.n.], 1990. http://library.epfl.ch/theses/?nr=849.
Texto completoPEIRO, BUENO JOAQUINA. "Relation entre les proprietes optiques et la morphologie de couches minces heterogenes". Paris 7, 1994. http://www.theses.fr/1994PA077173.
Texto completoTajani, Antonella. "Propriétés structurales, électroniques et optiques des couches minces de diamant dopées n". Université Joseph Fourier (Grenoble), 2003. http://www.theses.fr/2003GRE10059.
Texto completoGadenne, Patrice. "Croissance de couches minces d'or propriétés optiques, conductivité électrique et étude morphologique". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37597740x.
Texto completoAbani, Mohaldine. "Préparation et étude de couches minces semi-conductrices pour applications électro-optiques". Grenoble 2 : ANRT, 1988. http://catalogue.bnf.fr/ark:/12148/cb37611069s.
Texto completoTrinchero, Olivier. "Etude de l'adsorption de l'eau dans les filtres optiques multidiélectriques". Aix-Marseille 3, 1985. http://www.theses.fr/1985AIX3A001.
Texto completoMollenhauer, Ralf. "Etude de la propagation guidée dans les multicouches optiques : mesures d'atténuation et localisation des pertes dans l'empilement". Aix-Marseille 3, 1994. http://www.theses.fr/1994AIX30013.
Texto completoNinova, Kuznetsova Iva. "Elaboration par procédé sol-gel de couches minces de TiO2 nanostructuré- Caractérisations structurale et optique". Paris 13, 2007. http://www.theses.fr/2007PA132002.
Texto completoThis work is devoted to the elaboration and characterization of thin nanometric TiO2 films by sol-gel process. Two approaches in preparation of sols have been realized : without additives abd with additives, that modify the titanium dioxyde precursor. The first approach is realized using titanium isopropoxyde (TTIP) as precursor in alcoholic solution with water and acid. The coresponding films(30-210 nm) are deposited by spin-coating and treated at 350-550 °C. They show high transparency in the visible (90%) and refraction index 2 suitable for antireflective application. The second approach is realized using two precursor, TiCl4 and TTIP, in alcoholic solutions with water and acid. Complexing agent 'diethylaminoethyl cellulose, polyethylene glycol, oxalic or citric acids), polymers(diethylaminoethyl cellulose and polyethylene glycol) and surfactants were used as additives. Thin films of different polymorphs were realized : anatase, rarely observed TiO2(B), preferentially oriented brookite. This work shows an influence of synthesis parameters of sol-gel derived TiO2 thin films on crystalline structure, morphology, and useful properties (optical, electrical)
Juodkazis, Saulius. "Propriétés structurales et optiques des couches minces guidantes dopées par des nanocristaux de CdS". Lyon 1, 1997. http://www.theses.fr/1997LYO10272.
Texto completoLumeau, Julien. "Application de la photosensibilité à la réalisation de filtres optiques interférentiels". Aix-Marseille 3, 2004. http://www.theses.fr/2004AIX30030.
Texto completoWe describe different use of photosensitivity for the realization of optical interference filters. We first realize a theoretical study of the programming of a multilayer Fabry-Perot filter, then of the programming of a cascaded solid-spaced Fabry-Perot filter; finally of an "hybrid" filter composed with a Bragg grating and a dielectric mirror. Secondly, we make a presentation of the realization of an absolute optical thickness measurement set-up of optical windows and we show the experimental results of the characterization of potentially photosensitive thin substrates. Finally, we describe the experimental manufacturing of a guided hybrid filter and of the programming of a solid-spaced etalon
Guillemot, François. "Couches poreuses de silice structurées par des latex : structure, propriétés mécaniques et applications optiques". Phd thesis, Ecole Polytechnique X, 2010. http://pastel.archives-ouvertes.fr/pastel-00543809.
Texto completoSoltani, Lakhdar. "Contribution à l'étude des propriétés optiques et photoélectriques des couches métalliques granulaires d'argent". Dijon, 1986. http://www.theses.fr/1986DIJOS052.
Texto completoDUMAS, LAURIN. "Couches minces de fluorure de magnésium déposées par procédés d'évaporation pour applications optiques". Grenoble INPG, 2000. http://www.theses.fr/2000INPG0097.
Texto completoSoltani, Lakhdar. "Contribution à l'étude des propriétés optiques et photoélectriques des couches métalliques granulaires d'argent". Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb376012872.
Texto completoBai, Xue. "Verres et céramiques de chalcogénures pour applications en optiques actives". Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S120/document.
Texto completoThe objective of this work is to develop materials for efficient frequency conversion. Two types of materials were studied. The first type relates to materials for frequency doubling by using second harmonic generation. We selected chalcogenide glass ceramics GeS₂+βGeS₂ and Ge₂₀Sb₁₂S₆₈+Cds for this study with a low difference of refractive index between the glass phase and the crystals. These ceramics were synthesized by melt-quenching technique and by combination of mechanical milling and Spark Plasma Sintering. The obtained glass ceramics have a high compactness greater than 99.9%. The optical losses due to scattering, particularly at shorter wavelengths, must be further improved before measurement of second harmonic generation. This new synthesis technique also allowed the manufacture of chalcogenide glasses which have a strong tendency to crystallize. The example was given by the synthesis of the glass Ge₁₅Ga₂₀S₆₅, located outside of the glass forming region determined by using the conventional melt-quenching method. The second type of the studied materials was related to luminescent materials with broadband absorption and emission. Transition metal ions, Fe, Ni and Mn, and divalent rare earth ion Eu were selected for its electronic transitions involving d-shell electrons. Wide and intense emissions were obtained with Eu²⁺ ions in CaS/ZnS and SrS/ZnS ceramics. The FWHM may exceed 100 nm. It has been demonstrated that the position of the emission strongly depends on the chemical environment of Eu²⁺ ions. In order to continuously adjust the position of the emission, thin films containing different Sr/Ca ratios were deposited by magnetron sputtering. Wide and adjustable emissions were obtained
Fang, Ming. "Physique de dépôt par plasma et propriétés optiques du silicium amorphe et microcristallin". Palaiseau, Ecole polytechnique, 1992. http://www.theses.fr/1992EPXX0006.
Texto completo