Relevant bibliographies by topics / Processus 2 photons

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Processus 2 photons'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Processus 2 photons"

1

Jiang, Ping, Na Ma, Peng Liu, Wenxuan Wu, and Kai Zhang. "An Easy-Implemented On-Chip Waveguide Coupled Single Photon Source Based on Self-Assembled Quantum Dots Membrane." Applied Sciences 11, no. 2 (January 13, 2021): 695. http://dx.doi.org/10.3390/app11020695.

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In recent years, many groups and institutions have been committed to the research of integrated quantum photonic circuit technologies, of which the key components are waveguide coupled single photon sources. In this study, we propose an on-chip waveguide-coupled single photon source that is easily implemented as the waveguide is directly made from the quantum dot membrane. In order to scatter light out of the on-chip waveguide plane into the detection apparatus, grating output couplers are made at both ends of the waveguide. The photon statistics of the on-chip photon source were investigated by second-order correlation function g(2)(τ) measurements using a Hanbury Brown and Twiss interferometer. From the spectra and cross-correlation experiments by collecting emission at the point of quantum dot and out coupler, the emitting of single photons from the same quantum dot and propagating via the waveguide to the out couplers was confirmed. These results show that we have achieved an on-chip single photon source that is easily implemented and easily integrated into quantum photonic circuits.
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Rivera, Nicholas, Gilles Rosolen, John D. Joannopoulos, Ido Kaminer, and Marin Soljačić. "Making two-photon processes dominate one-photon processes using mid-IR phonon polaritons." Proceedings of the National Academy of Sciences 114, no. 52 (December 12, 2017): 13607–12. http://dx.doi.org/10.1073/pnas.1713538114.

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Phonon polaritons are guided hybrid modes of photons and optical phonons that can propagate on the surface of a polar dielectric. In this work, we show that the precise combination of confinement and bandwidth offered by phonon polaritons allows for the ability to create highly efficient sources of polariton pairs in the mid-IR/terahertz frequency ranges. Specifically, these polar dielectrics can cause emitters to preferentially decay by the emission of pairs of phonon polaritons, instead of the previously dominant single-photon emission. We show that such two-photon emission processes can occur on nanosecond time scales and can be nearly 2 orders of magnitude faster than competing single-photon transitions, as opposed to being as much as 8–10 orders of magnitude slower in free space. These results are robust to the choice of polar dielectric, allowing potentially versatile implementation in a host of materials such as hexagonal boron nitride, silicon carbide, and others. Our results suggest a design strategy for quantum light sources in the mid-IR/terahertz: ones that prefer to emit a relatively broad spectrum of photon pairs, potentially allowing for new sources of both single and multiple photons.
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Wang, Meiyu, Quanzhi Hao, Fengli Yan, and Ting Gao. "Qubit-loss-free fusion of W states." Quantum Information and Computation 18, no. 1&2 (February 2018): 75–84. http://dx.doi.org/10.26421/qic18.1-2-4.

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With the assistance of weak cross-Kerr nonlinearities, we introduce an optical scheme to fuse two small-size polarization entangled photonic W states into a large-scale W state without qubit loss, i.e.,Wn+m state can be generated from an n-qubit W state and a m-qubit W state. To complete the fusion task, two polarization entanglement processes and one spatial entanglement process are applied. The fulfillments of the above processes are contributed by a cross-Kerr nonlinear interaction between the signal photons and a coherent state via Kerr media. We analyze the resource cost and the success probability of the scheme. There is no complete failure output in our fusion mechanism, and all the remaining states are recyclable. In addition, there is no need for any controlled quantum gate and any ancillary photon, so this fusion scheme may be implemented with current experimental techniques.
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Vegt, Wim. "Stability and Interaction Processes within Separate Magnetic and Electric Fields and Equilibrium within Electromagnetic Confinements." European Journal of Engineering Research and Science 4, no. 10 (October 17, 2019): 24–41. http://dx.doi.org/10.24018/ejers.2019.4.10.1568.

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The inner structure of a photon is based on a 3-dimensional anisotropic equilibrium within the electromagnetic pulses in which an equilibrium does exist for the Electric and the Magnetic Fields separately generated by the pulses. A photon cannot be considered as a particle. Because particles are 3-dimensional confinements. Photons are anisotropic (in 1st and 2nd dimension a particle and in the 3rd dimension a wave) confinements of electromagnetic pulses, generated during the energy transitions within the atoms. Photons are 2-dimensional confinements of electromagnetic energy and demonstrate the property of inertia (electromagnetic mass) in the 2 directions of confinement. In the 3rd direction, the direction of propagation, photons can only be considered as an electromagnetic wave and for that reason do not demonstrate the property of inertia. Electromagnetic waves cannot be accelerated or decelerated because the speed of light is a universal constant. For that reason, photons interact with a gravitational field in an anisotropic way. Due to a gravitational field, photons can be accelerated or decelerated in the directions perpendicular to the direction of propagation and follow a curved path. But a gravitational field in the direction of propagation will have no impact on the speed of the photons, which will remain the unchanged universal constant, the speed of light. Photonics is the physical science of light based on the concept of “photons” introduced by Albert Einstein in the early 20th century. Einstein introduced this concept in the “particle-wave duality” discussion with Niels Bohr to demonstrate that even light has particle properties (mass and momentum) and wave properties (frequency). That concept became a metaphor and from that time on a beam of light has been generally considered as a beam of particles (photons). Which is a wrong understanding. Light particles do not exist. Photons are nothing else but electromagnetic complex wave configurations and light particles are not like “particles” but separated electromagnetic wave packages, 2-dimensionally confined in the directions perpendicular to the direction of propagation and in a perfect equilibrium with the radiation pressure and the inertia of electromagnetic energy in the forward direction, controlling the speed of light. This new theory will explain how electromagnetic wave packages demonstrate inertia, mass and momentum and which forces keep the wave packages together in a way that they can be measured like particles with their own specific mass and momentum. All we know about light, and in generally about any electromagnetic field configuration, has been based only on two fundamental theories. James Clerk Maxwell introduced in 1865 the “Theory of Electrodynamics” with the publication: “A Dynamical Theory of the Electromagnetic Field” and Albert Einstein introduced in 1905 the “Theory of Special Relativity” with the publication: “On the Electrodynamics of Moving Bodies” and in 1913 the “Theory of General Relativity” with the publication ”Outline of a Generalized Theory of Relativity and of a Theory of Gravitation”. However, both theories are not capable to explain the property of electromagnetic mass and in specific the anisotropy of the phenomenon of electromagnetic mass presented e.g. in a LASER beam. To understand what electromagnetic inertia and the corresponding electromagnetic mass is and how the anisotropy of electromagnetic mass can be explained and how it has to be defined, a New Theory about Light has to be developed. A part of this “New Theory about Light”, based on Newton’s well- known Equation in 3 dimensions will be published in this article in an extension into 4 dimensions. Newton’s 4-dimensional law in the 3 spatial dimensions results in an improved version of the classical Maxwell equations and Newton’s law in the 4th dimension (time) results in the quantum mechanical Schrödinger wave equation (at non-relativistic velocities) and the relativistic Dirac equation.
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Tanaka, Shotaro, Shuto Suzuki, Tomohiro Mishima, and Kazuhiro Kanda. "Performance of BL07A at NewSUBARU with installation of a new multi-layered-mirror monochromator." Journal of Synchrotron Radiation 28, no. 2 (February 11, 2021): 618–23. http://dx.doi.org/10.1107/s1600577520016781.

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Soft X-rays excite the inner shells of materials more efficiently than any other form of light. The investigation of synchrotron radiation (SR) processes using inner-shell excitation requires the beamline to supply a single-color and high-photon-flux light in the soft X-ray region. A new integrated computing multi-layered-mirror (MLM) monochromator was installed at beamline 07A (BL07A) of NewSUBARU, which has a 3 m undulator as a light source for irradiation experiments with high-photon-flux monochromatic light. The MLM monochromator has a high reflectivity index in the soft X-ray region; it eliminates unnecessary harmonic light from the undulator and lowers the temperature of the irradiated sample surfaces. The monochromator can be operated in a high vacuum, and three different mirror pairs are available for different experimental energy ranges; they can be exchanged without exposing the monochromator to the atmosphere. Measurements of the photon current of a photodiode on the sample stage indicated that the photon flux of the monochromatic beam was more than 1014 photons s−1 cm−2 in the energy range 80–400 eV and 1013 photons s−1 cm−2 in the energy range 400–800 eV. Thus, BL07A is capable of performing SR-stimulated process experiments.
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Denk, Winfried. "Multi-Photon Microscopy, High Resolution Imaging Deep in Strongly Scattering Specimens." Microscopy and Microanalysis 3, S2 (August 1997): 301–2. http://dx.doi.org/10.1017/s1431927600008394.

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Imaging small structures substantially below the tissue surface in living specimens poses special challenges mainly because light is scattered by ever present refractive index inhomogeneities. Confocal microscoy removes the blurring caused by scattered and out-of-focus light but does so only at the expense of photodynamic damage that is often unacceptable when observing live specimens.Multi-photon absorption microscopy[l] solves these problems because excitation is virtually limited to the focal plane. Out-of-focus photobleaching and photodamage are therefore eliminated. In scattering samples substantial improvements accrue even for the focal plane because, different from confocal microscopy, where only ballistic fluorescenc photons can be used, in the multi-photon microscope scattered photons can be utilized in addition [2-4], provided whole-field detection is used[5].Many questions in the study of the nervous system require the investigation of intact portions of neural tissue in order to preserve the multiply branched processes of neurons, often extending over hundreds of microns, together with the local nervous circuitry.
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Luque, Antonio, Antonio Martí, and Arthur J. Nozik. "Solar Cells Based on Quantum Dots: Multiple Exciton Generation and Intermediate Bands." MRS Bulletin 32, no. 3 (March 2007): 236–41. http://dx.doi.org/10.1557/mrs2007.28.

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AbstractSemiconductor quantum dots may be used in so-called third-generation solar cells that have the potential to greatly increase the photon conversion efficiency via two effects: (1) the production of multiple excitons from a single photon of sufficient energy and (2) the formation of intermediate bands in the bandgap that use sub-bandgap photons to form separable electron–hole pairs. This is possible because quantization of energy levels in quantum dots produces the following effects: enhanced Auger processes and Coulomb coupling between charge carriers; elimination of the requirement to conserve crystal momentum; slowed hot electron–hole pair (exciton) cooling; multiple exciton generation; and formation of minibands (delocalized electronic states) in quantum dot arrays. For exciton multiplication, very high quantum yields of 300–700% for exciton formation in PbSe, PbS, PbTe, and CdSe quantum dots have been reported at photon energies about 4–8 times the HOMO–LUMO transition energy (quantum dot bandgap), respectively, indicating the formation of 3–7 excitons/photon, depending upon the photon energy. For intermediate-band solar cells, quantum dots are used to create the intermediate bands from the con fined electron states in the conduction band. By means of the intermediate band, it is possible to absorb below-bandgap energy photons. This is predicted to produce solar cells with enhanced photocurrent without voltage degradation.
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Olofson, Frans, and Leif Holmlid. "Intense ionizing radiation from laser-induced processes in ultra-dense deuterium D(-1)." International Journal of Modern Physics E 23, no. 09 (September 2014): 1450050. http://dx.doi.org/10.1142/s0218301314500505.

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Nuclear fusion in ultra-dense deuterium D(-1) has been reported from our laboratory in a few studies using pulsed lasers with energy < 0.2 J. The direct observation of massive particles with energy 1–20 MeV u-1 is conclusive proof for fusion processes, either as a cause or as a result. Continuing the step-wise approach necessary for untangling a complex problem, the high-energy photons from the laser-induced plasma are now studied. The focus is here on the photoelectrons formed. The photons penetrating a copper foil have energy > 80 keV. The total charge created is up to 2 μC or 1 × 1013 photoelectrons per laser shot at 0.13 J pulse energy, assuming isotropic photon emission. The variation of the photoelectron current with laser intensity is faster than linear for some systems, which indicates rapid approach to volume ignition. On a permanent magnet at approximately 1 T, a laser pulse-energy threshold exists for the laser-induced processes probably due to the floating of most clusters of D(-1) in the magnetic field. This Meissner effect was reported previously.
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Orellana, M., L. J. Pellizza, and G. E. Romero. "On the reprocessing of gamma-rays produced by jets." Proceedings of the International Astronomical Union 6, S275 (September 2010): 98–99. http://dx.doi.org/10.1017/s1743921310015723.

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AbstractSystems of two very different sizescales are known to produce very high-energy (VHE) radiation in their jets: AGNs and microquasars. The produced VHE photons (Eγ ~ 1 TeV) can be absorbed by the intense environmental soft photon fields, coming from the companion star (in high mass binaries) or from the accreting material (disk+corona in AGNs), as these are the dominant sources at energies around ~(mec2)2/Eγ. Energetic pairs are created by the photon-photon annihilation, and, depending on how efficient are the competing cooling channels, the absorption can lead to a reprocessing by Inverse Compton pair-cascade development. A self-consistent modeling of these systems as gamma-ray sources should then include, along with the emission and absorption processes, a thorough treatment of the pair cascades. We discuss here on this issue, focusing on our (preliminary) results of numerical simulations devoted to a study case similar to the high-mass microquasar candidate LS 5039.
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Opromolla, Michele, Alberto Bacci, Marcello Rossetti Conti, Andrea Renato Rossi, Giorgio Rossi, Luca Serafini, Alberto Tagliaferri, and Vittoria Petrillo. "High Repetition Rate and Coherent Free-Electron Laser Oscillator in the Tender X-ray Range Tailored for Linear Spectroscopy." Applied Sciences 11, no. 13 (June 24, 2021): 5892. http://dx.doi.org/10.3390/app11135892.

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Fine time-resolved analysis of matter—that is, spectroscopy and photon scattering—in the linear response regime requires fs-scale pulsed, high repetition rate, fully coherent X-ray sources. A seeded Free-Electron Laser, driven by a linac based on Super Conducting cavities, generating 108–1010 coherent photons at 2–5 keV with 0.2–1 MHz of repetition rate, can address this need. The scheme proposed is a Free-Electron Laser Oscillator at 3 keV, working with a cavity based on X-ray mirrors. The whole chain of the X-ray generation is here described by means of start-to-end simulations.
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Dissertations / Theses on the topic "Processus 2 photons"

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Mahjoub, Ahmed. "Processus énantiosélectifs dans des complexes à liaisons hydrogène." Paris 11, 2009. http://www.theses.fr/2009PA112185.

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La chiralité joue un rôle très important dans la chimie du vivant. En effet, la plupart des molécules biologiques sont chirales. Le processus de reconnaissance moléculaire par lequel une molécule chirale différentie entre les deux énantiomères d’une autre molécule chirale est l’un des processus fondamentaux dans les systèmes vivants. La discrimination chirale met en jeu des interactions spécifiques à travers la formation de paires de contact diastéréoisomères en phase condensée. Le sujet de ce travail de thèse est d’étudier ces interactions énantiosélectives à l’échelle moléculaire, en étudiant en phase gazeuse des complexes chiraux formés en jet supersonique. Le principe de l’expérience repose sur la complexation d’une forme énantiomère pure d’un chromophore avec les deux énantiomères d’un solvant chiral. Les diastéréoisomères ainsi formés possèdent deux structures différentes. Cette différence de structure se manifeste par deux signatures spectroscopiques différentes. La combinaison de la spectroscopie laser (électronique et vibrationnelle) et des calculs théoriques permet d’étudier les interactions responsables de la discrimination chirale. Ce travail de thèse consiste en l’étude de la discrimination chirale de deux énantiomères du Méthyl-lactate, en utilisant trois chromophores chiraux différents : le (±)-cis-1-amino-indan-2-ol ; le Méthyl-mandélate et le S(-) 1,2,3,4-tetrahydro-3-isoquinoléine méthanol. Ces trois systèmes nous ont permis d’étudier le rôle dans la discrimination chirale de trois facteurs importants qui sont : la formation des multiples liaisons hydrogène, les forces dispersives et l’isomérie conformationnelle
Chirality plays a very important role in life chemistry. Indeed, most biological molecules are chiral. The molecular recognition process, by which a chiral molecule differentiates between the two enantiomers of another chiral molecule, is one of the fundamental processes in the living systems. In condensed phase, chiral discrimination rests on specific interactions through the formation of diastereoisomeric contact pairs. The topic of this work is to study enantioselective interactions at a molecular scale, by studying jet-cooled chiral complexes. The principle of the experiment consists in complexing an enantiopure chromophore with the two enantiomers of a chiral solvent. The formed diastereoisomers have two different structures. This structure difference manifests itself by two different spectroscopic signatures. The combination of laser spectroscopy (electronic and vibrationnal) and of theoretical calculations allows studying the interactions responsible for chiral discrimination. This thesis work consists in the study of the chiral discrimination between the two enantiomers of Methyl-lactate, by using three different chiral chromophores: (±)-cis-1-amino-indan-2-ol; Methyl-mandelate and S (-) 1,2,3,4-tetrahydro-3-isoquinoline-methanol. These three systems allowed us to study the role of three important factors in chiral discrimination: multiple hydrogen bonds, dispersive forces and conformational isomerism
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Brune, Michel. "Realisation d'un micromaser a deux photons." Paris 6, 1988. http://www.theses.fr/1988PA066112.

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Realisation du premier oscillateur maser a deux photons. Il fonctionne en continu sur une transition atomique a deux photons. Sa realisation a ete rendue possible grace a l'utilisation d'une cavite micro-onde supraconductrice (f = 68 ghz) de tres haute surtension ( q # 10**(8)) accordee sur une transition a deux photons entre etats de rydberg du rubidium presentant des configurations de niveaux particulierement favorables. Description de l'experience ainsi qu'une etude theorique d'abord semi-classique puis quantique des proprietes specifiques du micromaser a deux photons
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Mahjoub, Ahmed. "PROCESSUS ÉNANTIOSÉLÉCTIFS DANS DES COMPLEXES À LIAISONS HYDROGÈNE." Phd thesis, Université Paris Sud - Paris XI, 2009. http://tel.archives-ouvertes.fr/tel-00459590.

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La chiralité joue un rôle très important dans la chimie du vivant. En effet, la plupart des molécules biologiques sont chirales. La discrimination chirale met en jeu des interactions spécifiques à travers la formation de paires de contact diastéréoisomères en phase condensée. Le sujet de ce travail de thèse est d'étudier ces interactions énantiosélectives à l'échelle moléculaire, en étudiant en phase gazeuse des complexes chiraux formés en jet supersonique. Le principe de l'expérience repose sur la complexation d'une forme énantiomère pure d'un chromophore avec les deux énantiomères d'un solvant chiral. Les diastéréoisomères ainsi formés possèdent deux structures différentes. Cette différence de structure se manifeste par deux signatures spectroscopiques différentes. La combinaison de la spectroscopie laser (électronique et vibrationnelle) et des calculs théoriques permet d'étudier les interactions responsables de la discrimination chirale. Ce travail de thèse consiste en l'étude de la discrimination chirale de deux énantiomères du Méthyl-lactate, en utilisant trois chromophores chiraux différents : le (±)-cis-1-amino-indan-2-ol ; le Méthyl-mandélate et le S(-) 1,2,3,4-tetrahydro-3-isoquinoléine méthanol. Ces trois systèmes nous ont permis d'étudier le rôle dans la discrimination chirale de trois facteurs importants qui sont : la formation des multiples liaisons hydrogène, les forces dispersives et l'isomérie conformationnelle.
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Chennoufi, Rahima. "Etudes des relations structure-activités de molécules photoactivables pour imager et déclencher des processus biologiques sous excitation 2-photon." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLN022/document.

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Les travaux présentés dans ce manuscrit abordent l’étude de deux familles distinctes de molécules photoactivables induisant des processus biologiques différents sous excitation 2-photon : les triphénylamines (TPAs) et les Nanotriggers de deuxième génération (NTs). Les TPAs présentent un grand intérêt pour la thérapie photodynamique (PDT) 2-photon, grâce à leur section efficace d’absorption 2-photon élevées (325-764 GM) et leur capacité à induire la mort cellulaire, médiée par la production d’espèces réactives de l’oxygène (ROS) sous excitation 1- ou 2-photon. De plus, leur forte fluorescence permet d’imager la mort cellulaire grâce à un comportement singulier dans les cellules : les TPAs sont initialement localisés dans le cytoplasme des cellules vivantes, principalement au niveau mitochondrial, mais se re-localisent dans le noyau des cellules en apoptose. Les NTs de deuxième génération ont été conçus suivant le modèle de NT1, le premier Nanotrigger synthétisé. Leur structure générale a été conceptualisée pour se fixer à la protéine NO synthase (NOS) et générer un potentiel redox élevé uniquement sous excitation lumineuse, initiant ainsi un transfert d’électron à travers la NOS aboutissant à une production de NO. Les structures chimiques des sept molécules nouvellement synthétisées diffèrent à plusieurs niveaux. Cette étude a permis d’identifier, parmi les sept NT de deuxième génération, deux molécules ayant la capacité de pénétrer dans les cellules endothéliales, de cibler la eNOS et d’initier le transfert d’électron à travers la eNOS sous excitation 1- ou 2-photon. Les expériences réalisées au cours de cette thèse sur les deux familles de composés, ont également permis de mettre en évidence les relations entre la structure des molécules et les différents mécanismes induits par leur photo-activation
The presented works in this manuscript approach the study of two distinct families of photoactivatable molecules that induce different biological processes under 2-photon excitation : triphenylamines (TPAs) and second generation Nanotriggers (NTs). TPAs present a great interest for 2-photon photodynamic therapy (PDT), thanks to their high 2-photon absorption cross-sections (325-764 GM) and their ability to induce cell death mediated by reactive oxygen species (ROS) production under 1- or 2-photon excitation. Moreover, their high fluorescence allows the imaging of cell death due to their particular behaviour in cells: TPAs initially localize in the cytoplasm of living cells, but translocate to the nucleus of apoptotic cells. Second generation NTs were designed based on the model of NT1, the first synthesized Nanotrigger. Their general structure has been designed to bind to the NO Synthase protein (NOS) and generate a high redox potential under excitation only, leading to the initiation of the electron flow through the protein and resulting in NO production. The chemical structures of the seven newly synthesized molecules differ on many levels. This study has identified, among the seven second generation NTs, two molecules which are able to penetrate in endothelial cells, target eNOS and initiate the electron transfer at the eNOS level under 1- or 2-photon excitation. The experiments presented in this thesis allowed to establish structure-activity relationships for each compound family regarding the different mechanisms induced by their photoactivation
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Gendron, François. "Étude spectroscopique de métaux de transition dans les semi-conducteurs." Paris 6, 1986. http://www.theses.fr/1986PA066001.

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Étude par RPE, absorption optique et photoluminescence de ZnS : Ni, ZnTe : Ni et GaAs : Ni, effets du champ magnétique et d'une contrainte. Mise en évidence d'une raie à zéro phonon dans les processus d'absorption, interprétation par la transition interne **(2)T::(2) -> **(2)E de Ni**(+) isolé.
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Andraud, Chantal. "Defauts d'empilement dans le materiau unidimensionnel cscdbr::(3) : etude spectroscopique." Paris 6, 1987. http://www.theses.fr/1987PA066140.

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L'etude des proprietes optiques de cscdbr::(3) a montre l'existence de centres br::(2)**(2-). L'excitation des echantillons par des rayonnements ionisants (rx, faisceau d'electrons) et des experiences d'absorption a deux photons ont permis d'associer les differentes bandes d'emission et d'absorption observees a des transitions appartenant a ces centres. L'existence de ces centres br::(2)**(2-) est attribuee a la presence de defauts d'empilement. L'effet d'une pression hydrostatique, le dopage par des ions pb**(2x) et le recuit des cristaux confirment l'hypothese
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Horton, Joseph Hugh. "Surface photo-oxidation and metal film growth processes on amorphous GeS←2." Thesis, University of Cambridge, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337978.

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LIBRANTZ, ANDRE F. H. "Investigacao dos processos de excitacao multifotonica da configuracao 4fsup(2)5d nos cristais de LiYFsub(4), LuLiFsub(4) e BaYsub(2)Fsub(8) dopados com neodimio trivalente." reponame:Repositório Institucional do IPEN, 2004. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11202.

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Tese (Doutoramento)
IPEN/T
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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Doclot, Olivier. "Etude des propriétés optiques non linéaires de troisième ordre de la molécule et du cristal de 4-(N,N diéthylamino)-b-nitrostyrène par Z scan et ellipsométrie." Grenoble 1, 1996. http://www.theses.fr/1996GRE10230.

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Dans cette these, nous avons etudie les proprietes optiques non lineaires de troisieme ordre de la molecule et du cristal de 4-(n,n diethylamino)-nitrostyrene (deanst). Nous avons fait des mesures d'absorption a deux photons de la molecule de deanst en solution par ellipsometrie kerr. Nous avons modelise le spectre non lineaire ainsi obtenu a partir du spectre d'absorption lineaire et d'un unique parametre: la variation de moment dipolaire entre les etats s#0 et s#1. Nous avons monte un banc z scan qui permet la mesure de l'indice de refraction dependant de l'intensite et de l'absorption non lineaire aux deux longueurs d'onde 1,064 m et 532 nm. Les mesures a 1,064 m en solutions ont montre que la variation d'indice de refraction est dominee par l'effet d'orientation moleculaire et que l'absorption a deux photons est faible a cette longueur d'onde. Les mesures effectuees a 532 nm dans une bande d'absorption a un photon de la solution de deanst mettent en evidence de fortes non-linearites dues a la creation d'une population dans un etat excite. Ces mesures montrent qu'aux concentrations elevees, les molecules isolees ne sont pas les seules a jouer un role dans les proprietes non lineaires des solutions. Les mesures z scan sur le cristal de deanst revelent l'anisotropie de ses proprietes non lineaires. De plus, l'absorption non lineaire n'est pas uniquement interpretable par un phenomene de troisieme ordre et necessite l'intervention d'un coefficient non lineaire supplementaire. L'analyse des non-linearites du cristal de deanst doit etre envisagee dans le cadre d'un modele excitonique: le modele du gaz oriente en considerant une hyperpolarisabilite dominee par l'element tensoriel le long du grand axe de la molecule ne rend pas compte des non-linearites du cristal
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LIBRANTZ, ANDRE F. H. "Estudo comparativo da emissoes do Nd(3+) nas configuracoes 4fsup(2)5d e 4fsup(3) induzidas pela excitacao multifotonica em cristais de YLF, GLF, LLF." reponame:Repositório Institucional do IPEN, 2000. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10830.

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Dissertacao (Mestrado)
IPEN/D
Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP
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Books on the topic "Processus 2 photons"

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Singh, Jai, and Richard T. Williams, eds. Excitonic and Photonic Processes in Materials. Singapore: Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-287-131-2.

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Symposium, B. on Photon Beam and Plasma Assisted Processing Fundamentals and Device Technology (1988 Strasbourg France). Photon, beam, and plasma assisted processing: Proceedings of Symposium B on Photon, Beam, and Plasma Assisted Processing Fundamentals and Device Technology of the 1988 E-MRS Spring Conference, Strasbourg, France, 31 May-2 June, 1988. Amsterdam: North-Holland, 1989.

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International, Conference on Photo-Excited Processes and Applications (2nd 1995 Jerusalem Israel). ICPEPA-2: Proceedings of the second International Conference on Photo-Excited Processes and Applications, Jerusalem, Israel, September 17-21, 1995. Amsterdam: North-Holland, 1996.

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Book chapters on the topic "Processus 2 photons"

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Perrenoud, Emannuelle, Rohit Sharma, R. Ian MacDonald, and D. Lam. "Broadband Adaptive Optoelectronic Discrete Time Signal Processor." In Applications of Photonic Technology 2, 511–17. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_83.

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Franklin, William R., and Robert R. Kallman. "Optoelectronic Signal Processor for SAR Image Formation and Correlation." In Applications of Photonic Technology 2, 591–97. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_93.

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Meriaudeau, Fabrice, Eric Renier, Christophe Dumont, and Frederic Truchetet. "Vision Control System for the Laser Cladding Process." In Applications of Photonic Technology 2, 843–54. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_128.

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Liu, Haibo, and Yunlong Sheng. "Optically Interconnected Analog Focal Plane Image Processor Using Hybrid-Seed Technology." In Applications of Photonic Technology 2, 493–98. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_80.

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Gauvin, Serge, and Joseph Zyss. "Optical Parametric Processes in Crystalline Molecular Layered Confinement Structures: Second Harmonic Generation in Microcavities." In Applications of Photonic Technology 2, 41–49. Boston, MA: Springer US, 1997. http://dx.doi.org/10.1007/978-1-4757-9250-8_8.

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Saltiel, S., I. Buchvarov, and K. Koynov. "Control of Laser Light Parameters by χ(2):χ(2) Nonlinear Optical Devices." In Advanced Photonics with Second-Order Optically Nonlinear Processes, 89–112. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-007-0850-1_3.

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Parker, D. F., and E. N. Tsoy. "Solitary and Periodic Pulses for χ(2): Explicit Solutions in Abundance." In Advanced Photonics with Second-Order Optically Nonlinear Processes, 209–14. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-007-0850-1_13.

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Pavlov, L. I., and L. M. Kovachev. "Cascaded Processes in Gyrotropu Media and Novel Electro-Optical Effect on χ(2) Nonlinearity." In Advanced Photonics with Second-Order Optically Nonlinear Processes, 277–92. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-007-0850-1_23.

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Malek, M. Z. A., M. T. Zainuddin, A. M. Abdullah, and A. Isnin. "Optical and Structural Properties of Multi Deposition Film Derived SiO2-TiO2 Systems by Sol-Gel Process." In Semiconductor Photonics: Nano-Structured Materials and Devices, 101–4. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-471-5.101.

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Chaudhuri, B. Paul, B. Thubthimthong, and F. A. Chollet. "Development of Fabrication Process and Electrostatic Microactuator for a Mechanically Tunable 2-D Photonic Crystal." In Semiconductor Photonics: Nano-Structured Materials and Devices, 179–81. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-471-5.179.

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Conference papers on the topic "Processus 2 photons"

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Bose, Amartya, and Debabrata Goswami. "Insignificance of Relative Time delay between Photons for a Ultrafast Two-photon Process." In International Conference on Fibre Optics and Photonics. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/photonics.2012.w1b.2.

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Frasinski, L. J. "Bond hardening and zero-photon dissociation in H[sub 2][sup +]." In The 8th international conference on multiphoton processes (ICOMP VIII). AIP, 2000. http://dx.doi.org/10.1063/1.1291962.

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Hagan, David J., Matthew Reichert, Himansu S. Pattanaik, Eric W. Van Stryland, and Dmitry A. Fishman. "Extremely Nondegenerate 2-Photon Processes for Detection and Gain." In 2014 IEEE Photonics Society Summer Topical Meeting. IEEE, 2014. http://dx.doi.org/10.1109/sum.2014.33.

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Bahabad, Alon, Noa Voloch, Ady Arie, and Ron Lifshitz. "Nonlinear Photonic Quasicrystals for General χ(2) Processes." In Frontiers in Optics. Washington, D.C.: OSA, 2006. http://dx.doi.org/10.1364/fio.2006.ftuc7.

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Hou, Alin, Dongcheng Shi, Maobin Yi, Zhaoxu Yan, Daming Zhang, Shaolin Liu, Jie Sun, Weinan Gao, and Hongfei Liu. "Sol-gel-processed TiO 2 /SiO 2 films for electro-optic effect." In Photonics Asia 2007, edited by Yiping Cui, Qihuang Gong, and Yuen-Ron Shen. SPIE, 2007. http://dx.doi.org/10.1117/12.759238.

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Marpaung, David. "Integrated Microwave Photonic Brillouin Processor." In Photonics in Switching. Washington, D.C.: OSA, 2017. http://dx.doi.org/10.1364/ps.2017.pw1d.2.

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Hagan, David J., Himansu Pattanaik, Matthew Reichert, Dmitry Fishman, and Eric Van Stryland. "Extremely nondegenerate 2-photon processes for Mid-IR detectors and sources." In Latin America Optics and Photonics Conference. Washington, D.C.: OSA, 2014. http://dx.doi.org/10.1364/laop.2014.ltu1d.2.

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Ramakrishna, S. Anantha. "Designing Metamaterial Structures for Controlling Optical Processes." In International Conference on Fibre Optics and Photonics. Washington, D.C.: OSA, 2012. http://dx.doi.org/10.1364/photonics.2012.m3a.2.

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Lawrence, W. G., Todd A. Van Marter, M. L. Nowlin, and Michael C. Heaven. "Energy transfer processes for I 2 (χ) of relevance to COIL." In Photonics West '96, edited by Robert C. Sze. SPIE, 1996. http://dx.doi.org/10.1117/12.236876.

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Abdallah, M. A., Matthias Achler, H. Braeuning, Angela Braeuning-Deminian, C. L. Cocke, Achim Czasch, R. Doerner, et al. "Photo- and charged-particle-ionization of He and D[sub 2] studied with COLTRIMS." In X-RAY AND INNER-SHELL PROCESSES: 18th International Conference. AIP, 2000. http://dx.doi.org/10.1063/1.1302746.

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