Literatura académica sobre el tema "Effet stark quantique"
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Artículos de revistas sobre el tema "Effet stark quantique"
Kraft, Matthew A. "How to Make Additional Time Matter: Integrating Individualized Tutorials into an Extended Day". Education Finance and Policy 10, n.º 1 (enero de 2015): 81–116. http://dx.doi.org/10.1162/edfp_a_00152.
Texto completoNguyen, Thanh Minh, Tuyen Quang Tran y Long Thanh Do. "Government Support and Firm Profitability in Vietnam". Comparative Economic Research. Central and Eastern Europe 21, n.º 4 (10 de diciembre de 2018): 105–20. http://dx.doi.org/10.2478/cer-2018-0029.
Texto completoModjo, Mohamad-Ikhsan y Agus-Supriatna Wibowo. "Pricing Strategy for a Smart-Tourist Area: Does Location Matters?" E3S Web of Conferences 426 (2023): 02061. http://dx.doi.org/10.1051/e3sconf/202342602061.
Texto completoOzyilmaz, Ayfer, Yuksel Bayraktar, Esme Isik, Metin Toprak, Mehmet Firat Olgun, Serdar Aydin y Tuncay Guloglu. "The Impact of Refugees on Income Inequality in Developing Countries by Using Quantile Regression, ANN, Fixed and Random Effect". Sustainability 14, n.º 15 (27 de julio de 2022): 9223. http://dx.doi.org/10.3390/su14159223.
Texto completoButkus, Mindaugas, Laura Dargenyte-Kacileviciene, Kristina Matuzeviciute, Dovile Rupliene y Janina Seputiene. "Are there more than three regimes in the output-unemployment relationship? A panel quantile regression estimates of Okun's gap model in EU countries". Eastern Journal of European Studies 15, n.º 1 (2024): 201–18. http://dx.doi.org/10.47743/ejes-2024-0109.
Texto completoVishnu, Chakrapani Lekha, Thomas Oommen, Snehamoy Chatterjee y Kochappi Sathyan Sajinkumar. "Addressing the Effect of Intra-Seasonal Variations in Developing Rainfall Thresholds for Landslides: An Antecedent Rainfall-Based Approach". GeoHazards 5, n.º 3 (3 de julio de 2024): 634–51. http://dx.doi.org/10.3390/geohazards5030033.
Texto completoVettas, Nikos, Konstantinos Peppas, Sophia Stavraki y Michail Vasileiadis. "The contribution of industry to the Greek economy: facts and prospects". Economic bulletin, n.º 52 (1 de diciembre de 2020): 29–67. http://dx.doi.org/10.52903/econbull20205202.
Texto completoErbakan, Ayşe Naciye, Müzeyyen Arslan Bahadir, Fatoş Nimet Kaya, Büşra Güleç, Miraç Vural Keskinler, Özge Faydaliel, Banu Mesçi y Aytekin Oğuz. "The effect of close and intensive therapeutic monitoring of patients with poorly controlled type 2 diabetes with different glycemic background". Medicine 102, n.º 50 (15 de diciembre de 2023): e36680. http://dx.doi.org/10.1097/md.0000000000036680.
Texto completoMainz, Jeppe, Grethe Andersen, Jan Brink Valentin, Martin Faurholdt Gude y Søren Paaske Johnsen. "Disentangling Sex Differences in Use of Reperfusion Therapy in Patients With Acute Ischemic Stroke". Stroke 51, n.º 8 (agosto de 2020): 2332–38. http://dx.doi.org/10.1161/strokeaha.119.028589.
Texto completoSchmidt, Lena Katharina, Till Francke, Peter Martin Grosse, Christoph Mayer y Axel Bronstert. "Reconstructing five decades of sediment export from two glacierized high-alpine catchments in Tyrol, Austria, using nonparametric regression". Hydrology and Earth System Sciences 27, n.º 9 (11 de mayo de 2023): 1841–63. http://dx.doi.org/10.5194/hess-27-1841-2023.
Texto completoTesis sobre el tema "Effet stark quantique"
Le, Thomas Nicolas. "Diode laser accordable en longueur d'onde par effet Stark quantique confiné". Grenoble INPG, 2002. http://www.theses.fr/2002INPG0116.
Texto completoHaas, Helge. "Effet Stark quantique dans les puits de CdTe/CdZnTe et développement d'un dispositif photoréfractif". Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10146.
Texto completoDonon, Jeremy. "Caractérisation de paires d’ions par spectroscopies IR, UV et rayons X, interprétées par calculs de chimie quantique". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASS106.
Texto completoIon pairs are ubiquitous in nature, from sea water, aerosols, to living organisms. They influence the properties of concentrated ion solutions, and thus play a crucial role in various chemical reactions and biological processes. However, the characterization of ion pairs faces some difficulties: on one hand, several types of pairs coexist, and on the other hand, they are transient species in solution. In this context, this work presents several studies carried out according to three main research studies, backed by an original approach in the gas phase, and then in solution. Firstly, the effects of the electric field produced by the ion pair on the UV spectroscopy of a chromophore in gas phase (Stark effects) are studied. The ion groups can produce an electric field high enough to induce significant electronic Stark effects on a nearby UV chromophore. This study is conducted on model systems (C₆H₅-(CH₂)n-COO⁻,M⁺) with M = Li, Na, K, Rb, Cs and n = 1-3, allowing to vary the electric field experienced by the UV chromophore. These different systems are studied in the gas phase by UV spectroscopy combined with quantum chemistry calculations, as well as by conformation selective IR spectroscopy. Based on the analysis of the electronic Stark effects, precise conformational assignments can be proposed for electronic transitions separated by a few cm-1, without resorting to IR spectroscopy, or frequency calculations. The next study is focused mainly on understanding the environmental effects on ion pairs by microsolvation experiments in gas phase. The pair of sodium acetate ions [CH₃-COO⁻,Na⁺] is studied for the first time in a trimer complex with p-xylene by IR spectroscopy. Microhydration experiments are then carried out on charged ion pairs ([CH₃-COO⁻,M²⁺]; M = Ca, Ba), highlighting two different behaviours depending on the nature of the cation. The final research is to detect and identify the structures formed by the ions in electrolytic solutions by IR and RX spectroscopy. The first experiment is carried out on electrolytic solutions ([CH₃-COO⁻,M⁺]; M = Li, Na and K) by TF-IR spectroscopy by varying the ion concentration. A theoretical study is then carried out in order to propose a theoretical spectrum for each type of pair, and to confront them with experimental spectra in solution. The approach is based on the calculation of the IR signature of pairs ([CH₃-COO⁻,M⁺]; M = Li, Na, K, Rb and Cs) and free anion in solution, where the first solvation layer were described at the quantum level, followed by a solvent continuum. For each type of pair, spectroscopic families, consistent with the experimental data, are identified. This original approach paves way to the identification of supramolecular structures in electrolytic solutions. Finally, the first FZRET experiment in liquid micro-jet is carried out on a potassium acetate solution, providing access to a measurement of the distance distribution between cations and paired anions.In these studies, different methods are used ranging from experiment to theory, from the gas phase to solution. This work illustrates the need to combine several methods in order to obtain additional data and allow a better characterization of the supramolecular organisation of ions and their environment
Billaud, Baptiste. "Sur quelques propriétés des boîtes quantiques sphériques semiconductrices". Paris 6, 2009. http://www.theses.fr/2009PA066615.
Texto completoTeissier, Jean. "Nouvelles fonctionnalités dans les lasers à cascade quantique : contrôle de l'indice optique complexe intracavité". Paris 7, 2010. http://www.theses.fr/2010PA077262.
Texto completoThe control of the complex refractive index of the optical mode in a quantum cascade laser (QCL) is a major issue as in spectroscopy as in telecommunications. Indeed, this control would allow a precise tuning of the laser wavelength due to the generation of lateral sidebands for the real part and directly for the imaginary part. In a first time we developed a device allowing the intracavity control of the laser losses. The idea is to couple the laser cavity with another one containing a control area. This control area is composed by a stack of two asymmetric coupled wells who's absorption energy is controlled by the interssuband Stark effect, by appling a bias on this control area independently from the laser bias. This allows an amplitude modulation that can avoid the spectral linewidth enhancement due to thermal effects, with a consumed power near the milliwatt. We also shown the Kramers-Koenig relations inside a QCL, and his application to high frequencies. This word is a collaboration between MPQ/LPN/IEF and is financed by ANR MetalGuide
Pellarin, Michel. "Etude des états de Rydberg de l'argon et du francium par spectroscopie colinéaire : analyse des résultats par la théorie du défaut quantique à une ou plusieurs voies". Lyon 1, 1989. http://www.theses.fr/1989LYO10011.
Texto completoJankovic, Aleksandar. "Etats électroniques des boîtes quantiques de semiconducteur : rôle de l'environnement et couplage dépendant du spin". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2004. http://tel.archives-ouvertes.fr/tel-00111990.
Texto completoDans une premièm partie, nous étudions le rôle joué par l'environnement électrostatique sur la perte de cohérence dans les boîtes. Nous montrons que les fluctuations électrostatiques sont essentiellement de deux types, engendrant soit un décalage en énergie de la transition sans induire de déphasage, soit un élargissement homogène du type rétrécissement par le mouvement.
Dans une deuxième partie, nous nous intéressons à l'effet de l'interaction d'échange longue portée sur la structure fine de l'exciton confiné dans la boîte. En particulier, nous montrons la possibilité d'annuler le splitting d'échange résultant de l'anisotropie de forme de la boîte en appliquant un champ électrique le long de son grand axe. Nous montrons enfin qu'une anisotropie de polarisation apparaît à cause de la nature même de l'interaction d'échange.
Vasanelli, Angela. "Transitions optiques interbandes et intrabandes dans les boites quantiques simples et couplées verticalement". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2002. http://tel.archives-ouvertes.fr/tel-00003115.
Texto completoOllagnier, Antoine. "Microscopie de Photoïonisation : une étude classique, semi-classique et quantique". Phd thesis, Université Claude Bernard - Lyon I, 2007. http://tel.archives-ouvertes.fr/tel-00250373.
Texto completoSaab, Mohamad Yehia. "Photochimie organique guidée par pulses laser : Applications : Benzopyrane et Pyrazine". Thesis, Montpellier 2, 2014. http://www.theses.fr/2014MON20014/document.
Texto completoThe ring-opening photoisomerization of benzopyran, which occurs via a photochemical route involving a conical intersection,has been studied with quantum dynamics calculations using the multi-configuration time-dependent Hartree method (MCTDH). We introduce a mechanistic strategy to control the conversion of benzopyran to merocyanine with laser pulses. We use asix-dimensional model developed in a previous work for the potential energy surfaces (PES) based on an extension of thevibronic-coupling Hamiltonian model (diabatization method by ansatz), which depends on the most active degrees of freedom. The main objective of these quantum dynamics simulations is to provide a set of strategies that could help experimentalists tocontrol the photoreactivity vs. photostability ratio (selectivity). In this work we present:(i) a pump-dump technique used tocontrol the photostability, (ii) a two-step strategy to enhance the reactivity of the system: first, a pure vibrational excitation inthe electronic ground state that prepares the system and, second, an ultraviolet excitation that brings the system to the firstadiabatic electronic state; (iii) finally the effect of a non-resonant pulse (Stark effect) on the dynamics