Literatura científica selecionada sobre o tema "Magnétisme induit par la lumière"
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Artigos de revistas sobre o assunto "Magnétisme induit par la lumière"
Godin, Yves. "Précis pour une écologie de la lumière par le corps". Cahiers de danse N° 0, n.º 1 (5 de abril de 2023): 20–21. http://dx.doi.org/10.3917/cdd.001.0020.
Texto completo da fonteGuío-Carrión, Ana, Almudena Martín, José Aguilera, María Matabuena, Diego Megias, Anne Laure Demessant, Isabel Castillejo, Françoise Bernerd e Maria A. Blasco. "Protection contre le raccourcissement des télomères induit par la lumière UV par un écran solaire à large spectre". Annales de Dermatologie et de Vénéréologie - FMC 1, n.º 8 (dezembro de 2021): A355. http://dx.doi.org/10.1016/j.fander.2021.09.428.
Texto completo da fonteGourbier, Léonard, e Marcel Guenon. "Les transformations du package de contrôle en contexte austéritaire : les leçons de quatre études de cas longitudinales". Comptabilité Contrôle Audit Tome 30, n.º 1 (12 de fevereiro de 2024): 91–161. http://dx.doi.org/10.3917/cca.301.0091.
Texto completo da fonteMierzejewski, Stéphan, Sylvain Broccolichi, Christophe Joigneaux e Christelle Dormoy. "L’école du désengagement ? Sur-responsabilisation et impuissance des enseignants face aux difficultés des élèves". Retour sur les (dés)engagements enseignants 221 (2023): 71–88. http://dx.doi.org/10.4000/11w0c.
Texto completo da fonteDeschênes, Andrée-Anne. "Partager les connaissances malgré la distance : quel est l’effet de l’usage des technologies collaboratives?" Ad machina, n.º 5 (14 de fevereiro de 2022): 53–68. http://dx.doi.org/10.1522/radm.no5.1407.
Texto completo da fonteDjelloul, Ghaliya, e Delphine Masset. "De l’objet de désir aux sujets désirants". Emulations - Revue de sciences sociales, n.º 14 (16 de julho de 2015): 29–39. http://dx.doi.org/10.14428/emulations.014.003.
Texto completo da fonteOtis, Ghislain. "La protection constitutionnelle de la pluralité juridique : le cas de « l’adoption coutumière » autochtone au Québec". Dossier : La reconnaissance de l’adoption coutumière autochtone 41, n.º 2 (22 de setembro de 2014): 567–609. http://dx.doi.org/10.7202/1026934ar.
Texto completo da fonteSadani, M., N. Ouazzani e L. Mandi. "Impact de la sécheresse sur l'évolution de la qualité des eaux du lac Mansour Eddahbi (Ouarzazate, Maroc)". Revue des sciences de l'eau 17, n.º 1 (12 de abril de 2005): 69–90. http://dx.doi.org/10.7202/705523ar.
Texto completo da fonteSt John, Graham. "Hyperespace dans le cyberespace : DMT et méta-ritualisation". Drogues, santé et société 16, n.º 2 (13 de novembro de 2017): 76–103. http://dx.doi.org/10.7202/1041854ar.
Texto completo da fonteCHEMINEAU, P., G. BARIL, B. LEBOEUF, M. C. MAUREL, F. ROY, M. PELLICER-RUBIO, B. MALPAUX e Y. COGNIE. "Implications des progrès récents en physiologie de la reproduction pour la conduite de la reproduction dans l’espèce caprine". INRAE Productions Animales 12, n.º 2 (30 de abril de 1999): 135–46. http://dx.doi.org/10.20870/productions-animales.1999.12.2.3873.
Texto completo da fonteTeses / dissertações sobre o assunto "Magnétisme induit par la lumière"
Rombaut, Guillaume. "Magnétisme photo-induit dans de nouveaux matériaux dérivés des octacyanométallates". Phd thesis, Université Sciences et Technologies - Bordeaux I, 2001. http://tel.archives-ouvertes.fr/tel-00010259.
Texto completo da fonteYang, Xingyu. "Manipulating the inverse Faraday effect at the nanoscale". Electronic Thesis or Diss., Sorbonne université, 2024. http://www.theses.fr/2024SORUS219.
Texto completo da fonteLight-induced magnetism describes the effect where a material is magnetized by an optical pulse. In transparent materials, optically-induced magnetization can be realized directly by circularly polarized light. Sometimes, in metallic materials, this type of magnetization also exists due to the microscopic solenoidal path of electrons driven by circularly polarized light. In some cases, the light creates macroscopic circulating DC drift currents, which also induce DC magnetization in metal. In a broad sense, these light-induced magnetisms are known as the inverse Faraday effect.In the PhD project, I studied light-induced drift currents in multiple gold nanoantennas. We realized plasmonically enhanced stationary magnetic fields through these drift currents. The study is based on the Finite-Difference Time-Domain (FDTD) method and the corresponding light-induced magnetism theories. In different research topics, we have realized: 1) an ultrafast, confined, and strong stationary magnetic field in a bull-eye nanoantenna. 2) A stationary magnetic field through linear polarization in a nanorod. 3) A Neel-type skyrmion constructed by a stationary magnetic field in a nanoring. In these studies, we examined the optical properties of different nanoantennas and explained the physical origin of light-induced drift currents and stationary magnetic fields. We demonstrated the method to achieve plasmonically enhanced inverse Faraday effects and explored the possibility of realizing magnetization through linearly polarized incident light. Finally, we extended the inverse Faraday effect to more physical research areas, such as constructing skyrmions by stationary magnetic fields through the inverse Faraday effect.The magnetic effect of light remains a rich area of research. My studies might find applications in many areas, including magneto-optical materials and devices, optical data storage, biomedical applications, spintronics, quantum computing, fundamental research in electromagnetism, and advanced materials research
Loe-mie, Roland. "Stabilisation de fréquence de lasers à semi-conducteur par couplage optique résonnant induit par spectroscopie de polarisation". Paris 13, 1997. http://www.theses.fr/1997PA132023.
Texto completo da fonteOuazi, Safia. "Magnétisme induit par des impuretés dans l'état normal et supraconducteur de cuprates YBa2Cu3O6+delta". Paris 11, 2004. http://www.theses.fr/2004PA112135.
Texto completo da fonteThe electronic properties of cuprates superconductors differ totally from those of conventionnal metals. The mechanism at the origin of superconductivity is still not elucidated. The presence of antiferromagnetic correlations could play a crucial role for the formation of superconducting state and these correlations are an essential ingredient to describe theoretically the CuO2 planes. But at the present, an unambiguous characterization of the correlations is missing. We propose to characterize spatially the CuO2 planes response to atomic impurities substituted to the Cu site of CuO2 planes. The impurity-induced alternated magnetization is a signature of magnetic correlations. Nuclear Magnetic Resonance measurements of different nuclei types allowed us to measure, for the first time, the shape and extension of this induced magnetization, in the normal state of cuprates from underdoped up to slightly overdoped. We find that the alternated polarization envelope has an exponential shape whose extension increases when the temperature decreases, up to six lattice units just above the critical temperature Tc in the underdoped regime. When the doping increases, the amplitude and extension are both twice reduced. In the superconducting state, our measurements show, after correction from vortices effects : i) the survivance of the alternated magnetization, then of the magnetic correlations for T
Kachaya, Mona. "Amas d'argent induit dans des films minces de chlorure d'argent par implantation ionique et illumination : formation et stabilité". Lyon 1, 1986. http://www.theses.fr/1986LYO10069.
Texto completo da fonteRossi, Matteo. "La diffusion inélastique résonante de rayons X sur systèmes corrélés induit par l'interaction spin-orbite : applications scientifiques et développements instrumentaux". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY089/document.
Texto completo da fonteIridium oxides (iridates) have raised notable attention in the last decade due to the identification of a Mott insulating state realized by the joint action of crystal field, electron correlation, and spin-orbit coupling. Such state has been intensively investigated and novel quantum phases and excitations have been theoretically predicted and experimentally found. Undoubtedly, one of the most employed techniques to elucidate the low-energy physics of iridates is resonant inelastic X-ray scattering (RIXS). At the iridium L3 edge, it benefits from a particularly good energy resolution, which matches the energy scales of the relevant excitations, and from a favorable inelastic cross-section. The aim of the present thesis is twofold: conceive challenging instrumental upgrades that contribute to the advancement of the technique itself, and apply RIXS to inspect the magnetic and electronic properties of selected iridates.The main instrumental development concerns the design of a new RIXS spectrometer with polarization resolution. Polarization analysis of the scattered X-rays provides useful information about the symmetry and thus the nature of an excitation. However, it is rather unexploited because of severe technical challenges when energy resolution and efficiency must be preserved. The designed RIXS spectrometer with polarization analysis capabilities is still under construction, however the optical scheme has been validated by preliminary tests. Full polarization analysis is expected without degradation of energy resolution or efficiency with respect to current state-of-the-art RIXS spectrometers. Additional technical developments include sample-environment equipment to perform RIXS experiments in low-temperature and high-pressure conditions. The equipment has been successfully utilized to investigate the magnetic dynamics of the bilayer-perovskite Sr3Ir2O7 below its Néel temperature and up to 12 GPa. Our measurements provide additional observations that may sharpen the challenge to theoretical understanding of the magnetic dynamics of this material. Moreover, we demonstrate for the first time that RIXS experiments of the magnetic dynamics can be extended to unexplored thermodynamic conditions.Besides instrumental advances, additional experimental work has been carried out in order to study the magnetic and electronic excitations of the post-perovskite CaIrO3. Owing to its peculiar crystal structure, featuring both edge- and corner-sharing octahedra, the magnetic interactions of CaIrO3 are very different along orthogonal directions. In particular, the inhibition of the Heisenberg coupling along the edge-sharing direction induces one-dimensional magnetic behavior with characteristic fractional spinon-like excitations, which have been detected by RIXS. Electronic excitations are also found to have particular properties. Finally, I have focused on the electronic structure of Rb2[IrF6], which was theoretically predicted to realize a Mott insulating state similar to the one of iridium oxides. RIXS measurements helped to elucidate the electronic properties of this compound. The robustness of the electronic state has been tested against substitutions of the alkali metal and halogen, and application of physical pressure.The present work extends the potential of the RIXS technique to domains previously unexplored, i.e. polarization analysis of the scattered X-rays and high-pressure low-temperature experiments. I hope that the instrumental upgrades and applications of RIXS discussed in this thesis will further promote the technique as a powerful and reliable tool to characterize elementary excitations in correlated-electron systems
Lemoine, Nicolas. "Transport turbulent d'un plasma à travers un champ magnétique : observation par diffusion collective de la lumière". Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00002317.
Texto completo da fontePerny, Sébastien. "Alignement de cristaux liquides par irradiation en lumière linéairement polarisée de film minces de polymères photoréticulables". Cachan, Ecole normale supérieure, 1998. http://www.theses.fr/1998DENS0042.
Texto completo da fontePuthumpally, Joseph Raijumon. "Quantum Interferences in the Dynamics of Atoms and Molecules in Electromagnetic Fields". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS035/document.
Texto completo da fonteQuantum interference, coherent superposition of quantum states, are widely used for the understanding and engineering of the quantum world. In this thesis, two distinct problems that are rooted in quantum interference are discussed with their potential applications: 1. Laser induced electron diffraction (LIED) and molecular orbital imaging, 2. Collective effects in dense vapors and dipole induced electromagnetic transparency (DIET). The first part deals with the recollision mechanism in molecules when the system is exposed to high intensity infrared laser fields. The interaction with the intense field will tunnel ionize the system, creating an electron wave packet in the continuum. This wave packet follows an oscillatory trajectory driven by the laser field. This results in a collision with the parent ion from which the wave packet was formed. This scattering process can end up in different channels including either inelastic scattering resulting in high harmonic generation (HHG) and non-sequential double ionization, or elastic scattering often called laser induced electron diffraction. LIED carries information about the molecule and about the initial state from which the electron was born as diffraction patterns formed due to the interference between different diffraction pathways. In this project, a method is developed for imaging molecular orbitals relying on scattered photoelectron spectra obtained via LIED. It is based on the fact that the scattering wave function keeps the memory of the object from which it has been scattered. An analytical model based on the strong field approximation (SFA) is developed for linear molecules and applied to the HOMO and HOMO-1 molecular orbitals of carbon dioxide. Extraction of orbital information imprinted in the photoelectron spectra is presented in detail. It is anticipated that it could be extended to image the electro-nuclear dynamics of such systems. The second part of the thesis deals with collective effects in dense atomic or molecular vapors. The action of light on the vapor samples creates dipoles which oscillate and produce secondary electro-magnetic waves. When the constituent particles are close enough and exposed to a common exciting field, the induced dipoles can affect one another, setting up a correlation which forbids them from responding independently towards the external field. The result is a cooperative response leading to effects unique to such systems which include Dicke narrowing, superradiance, Lorentz-Lorenz and Lamb shifts. To this list of collective effects, one more candidate has been added, which is revealed during this study: an induced transparency in the sample. This transparency, induced by dipole-dipole interactions, is named “dipole-induced electromagnetic transparency”. The collective nature of the dense vapor excitation reduces the group velocity of the transmitted light to a few tens of meter per second resulting in 'slow' light. These effects are demonstrated for the D1 transitions of 85Rb and other potential applications are also discussed
Idrissi-Adib, Abdelrhani. "Etude théorique et expérimentale de la diffusion intégrée de la lumière par des molécules anisotropes : importance des corrélations d'orientation suivant le type de potentiel choisi". Angers, 1987. http://www.theses.fr/1987ANGE0014.
Texto completo da fonteCapítulos de livros sobre o assunto "Magnétisme induit par la lumière"
LEVY-BRUHL, Sacha. "Solidarité et épidémie". In Les épidémies au prisme des SHS, 229–38. Editions des archives contemporaines, 2022. http://dx.doi.org/10.17184/eac.6009.
Texto completo da fonte