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Articoli di riviste sul tema "Microscopie à mélange à quatre ondes"
Thedrez, B., e R. Frey. "Mélange à quatre ondes intracavité et fonctions logiques optiques". Revue de Physique Appliquée 22, n. 10 (1987): 1297–300. http://dx.doi.org/10.1051/rphysap:0198700220100129700.
Testo completoAstic, M., P. Barthelemy, D. Träger, L. Razzari, P. Delaye, R. Frey, R. André e G. Roosen. "Mélange à quatre ondes en bord de bande d'un cristal photonique 1D". Journal de Physique IV (Proceedings) 135, n. 1 (ottobre 2006): 93–95. http://dx.doi.org/10.1051/jp4:2006135014.
Testo completoPinard, M., M. Vallet e G. Grynberg. "Etude théorique et expérimentale des propriétés gyrométriques d'un oscillateur à mélange à quatre ondes en anneau". Journal de Physique 51, n. 18 (1990): 2051–72. http://dx.doi.org/10.1051/jphys:0199000510180205100.
Testo completoRomanelli, M., C. Leyder, J. Ph Karr, A. Bramati e E. Giacobino. "Mélange à quatre ondes de polaritons dans une microcavité semiconductrice planaire en régime de couplage fort". Journal de Physique IV (Proceedings) 135, n. 1 (ottobre 2006): 269–70. http://dx.doi.org/10.1051/jp4:2006135085.
Testo completoMasselin, P., G. Mouret, A. V. Andreev, A. V. Balakin, A. B. Kozlov, I. A. Ozheredov, I. R. Prudnikov e A. P. Shkurinov. "Somme de fréquence et mélange optique à quatre ondes dans un cristal photonique à une dimension: interaction non-colinéaire et excitation d'ondes inhomogènes". Journal de Physique IV (Proceedings) 12, n. 5 (giugno 2002): 289–90. http://dx.doi.org/10.1051/jp4:20020165.
Testo completoTesi sul tema "Microscopie à mélange à quatre ondes"
Bioud, Fatma Zohra. "Microscopie de mélange à quatre ondes résolue en polarisation pour sonder l’ordre moléculaire dans les milieux biologiques". Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM4380.
Testo completoThe capacity to quantify molecular orientational order in tissues is of a great interest since pathologies (skin lesion, neurodegenerative diseases, etc) can induce strong modifications in proteins’ organization. While numerous studies have been undertaken using polarization resolved second order nonlinear optical microscopy which is only specific to non-centrosymmetric organizations, higher order effects have been less explored. Four-wave mixing (FWM) microscopy and its resonant counterpart coherent anti-Stokes Raman scattering (CARS) can be of a great utility as label free diagnosis tools benefiting from less constraining symmetry rules. In this work, we implement incident polarizations tuning in FWM and CARS microscopy to probe molecular order, using a generic method to read-out symmetry information.Fourier analysis of the polarization-resolved FWM/CARS signal processed with an analytical model provides a fast and direct determination of the symmetry orders of the distribution function of the probed molecules. This method does not require a priori knowledge of the organization structure and provides quantitatively its second and fourth order symmetries. We applied this technique on different systems, from crystalline to less organized (multilamellar vesicles and proteins aggregates). We show that this new approach brings additional and more refined information on supra-molecular structures in complex media
Munhoz, Fabiana. "Microscopie de mélange à quatre ondes résolue en polarisation: lecture des symétries structurales et vibrationnelles dans les milieux moléculaires". Phd thesis, Université Paul Cézanne - Aix-Marseille III, 2010. http://tel.archives-ouvertes.fr/tel-00557684.
Testo completoIslam, Md Samiul. "Coherent ultrafast spectroscopy of excitons in Van der Waals materials". Electronic Thesis or Diss., Strasbourg, 2024. http://www.theses.fr/2024STRAE011.
Testo completoIn this thesis, based on an original development of ultrafast four wave mixing microscopy, the firstdirect measurement of excitonic coherence dynamics in rhenium disulfide was obtained. Theseresults demonstrated a unique robustness of excitonic coherence compared to other Transition metal dichalcogenide (TMD) materials. The potential for controlling the intrinsic properties of excitons in van der Waals (vdW) materials was explored in innovative two-dimensional assemblies. In particular, the impact of graphene in the excitonic environment of a heterostructure on the dynamic properties of these excitons has been investigated. Finally, a significant step towards understanding and engineering the optical properties of single photon emitting defects in hBN has been achieved
Bonneau, Marie. "Mélange à quatre ondes atomique dans un réseau optique". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00665955.
Testo completoLe, Bihan Eric. "Mélange à deux ondes et mélange à quatre ondes dans la vapeur de sodium : effets d'auto-oscillation". Paris 6, 1986. http://www.theses.fr/1986PA066235.
Testo completoRomanelli, Marco. "Mélange à quatre ondes de polaritons dans des microcavités semi-conductrices". Phd thesis, Université Pierre et Marie Curie - Paris VI, 2005. http://tel.archives-ouvertes.fr/tel-00011935.
Testo completoNous avons d'abord effectué des expériences dans le régime d'oscillation paramétrique de polaritons, dans la configuration d'«angle magique».
Nous avons ensuite mis en évidence un phénomène d'oscillation de mélange à quatre ondes, sous excitation résonnante par deux faisceaux de pompe contrapropageants. L'étude de la polarisation de l'émission non linéaire permet d'avoir accès à la dynamique de spin des polaritons. La mesure du bruit d'intensité de l'émission montre que le processus de mélange à quatre ondes produit deux populations de polaritons fortement corrélées.
Enfin, nous avons effectué une étude théorique du mélange à quatre ondes, afin de préciser les conditions qui permettraient d'observer des polaritons corrélés quantiquement.
Romanelli, Marco. "Mélange à quatre ondes de polaritonsss dans des microcavités semi-conductrices". Paris 6, 2005. https://tel.archives-ouvertes.fr/tel-00011935.
Testo completoSévigny, Benoit. "Fibres à cristaux photoniques et génération d'ultraviolets par mélange à quatre ondes". Thesis, Lille 1, 2015. http://www.theses.fr/2015LIL10176/document.
Testo completoThe main objective of this thesis is, firstly, to study the generation of ultraviolet light in photonic crystal fibers through four-wave mixing of a 532 nm pump, in particular in the presence of dispersion fluctuations due to the fabrication process and by exploring different pumping schemes; secondly, the aim was to develop a versatile analysis method of the modal content of multimode fibers.We used stochastic calculus to model the expected gain value of four-wave mixing as a function of the fluctuations of the fiber drawing process. Furthermore, alternative pumping schemes were studied to aim at producing high-quality UV beams.While studying the impact of stochastic fluctuations of the fiber drawing process, we confirmed that phase-matching points showing an invariance with respect to scale fluctuations should indeed provide maximum gain at that point, even for very large frequency detunings with respect to the pump. Concerning the generation of UV light with very high beam quality, we have isolated a pumping scheme in which the pump is split across two spatial modes of a photonic crystal fiber and take advantage of the phase-matching condition of the averaged pump dispersion of the two pump modes. We have shown experimentally that this process can produce ultraviolet light in the fundamental mode. Finally, the elaboration of an advanced multivariate statistical analysis method applied to inter-modal interference allowed one to separate, in a semi-automatic fashion, all the interferences and reconstruct the mode envelopes and modal power distribution without any of the hypotheses required by other methods
Grandclement, Didier. "Oscillation de cavités par mélange à deux et quatre ondes en régime continu". Phd thesis, Université Pierre et Marie Curie - Paris VI, 1987. http://tel.archives-ouvertes.fr/tel-00011859.
Testo completoMaitre, Agnès. "Instabilités crées par mélange à quatre ondes dans une vapeur atomique. Chaos et morphogénèse". Phd thesis, Ecole Polytechnique X, 1994. http://tel.archives-ouvertes.fr/tel-00011896.
Testo completoLibri sul tema "Microscopie à mélange à quatre ondes"
Bihan, Eric Le. Mélange à deux ondes et mélange à quatre ondes dans la vapeur de sodium: Effets d'auto-oscillation. Grenoble: A.N.R.T. Université Pierre Mendès France Grenoble 2, 1986.
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