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Literatura académica sobre el tema "Dispositif photonique"
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Artículos de revistas sobre el tema "Dispositif photonique"
Demesy, Guillaume, André Nicolet, Frédéric Zolla y Christophe Geuzaine. "Modélisation par la méthode des éléments finis avec onelab". Photoniques, n.º 100 (enero de 2020): 40–45. http://dx.doi.org/10.1051/photon/202010040.
Texto completoTesis sobre el tema "Dispositif photonique"
Gaignebet, Nicolas. "Réalisation et caractérisation de puces de capteurs à cristaux photoniques : Vers un dispositif de biodétection intégré". Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI128.
Texto completoThe needs for portable molecular analysis tools are growing, including in the fields of emergency care, early medical diagnosis, or food safety analysis. These needs lead to the development of performant biosensors, meeting the criteria of “Point-of-Care” (POC), that is, the detection in the field, whether at the patient’s place, the physician’s office, etc. POC sensors’ primary missions are to reduce the analysis time and cost, to allow for a quicker therapeutic decision. In addition, thanks to their portability, they can provide analysis availability in remote areas, far from hospitals or medical laboratories. The objective of this PhD work is to develop an optical sensing system, compatible with the POC criteria, and addressing the needs in terms of molecular screening. To meet these criteria, this sensing system should be portable, fast, low-cost, and able to detect multiple biomolecules in parallel on a disposable chip, while providing good sensing performances. The approach presented in this manuscript consists in a lens-less imaging system, exploiting photonic crystals on a silicon chip, with a normal incidence illumination by a low-cost light source. The main results of this PhD work are on one hand the demonstration of a specific detection of biomolecules, thanks to our photonic crystal sensors; and on the other hand the demonstration of the integration of an on-chip spectrometry functionality using photonic crystals, towards an application in lens-less imaging detection compatible with the POC criteria
Toullec, Alexis. "Dispositif d’aiguille fibrée pour la spectroscopie de fluorescence endogène de lésions mammaires et pulmonaires ex vivo et in vivo ; vers le développement d'une méthode d’ histopathologie in situ". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS154/document.
Texto completoThe third Cancer Plan, launched in 2013, identifies early diagnosis as one of the major challenges for improving patient care. Despite the growth in medical imaging modalities and performance, challenges remain in diagnosis aid and optimizing the use of biopsy.Photonic imaging and especially spectrally resolved fluorescence has already been tested for the ex vivo characterization of breast and lung tumors, without contrast agent or sample processing. Our goal is to characterize the capabilities of an innovative medical device, developed in the laboratory, using a low-caliber fibered needle for the spectral analysis of the endogenous fluorescence of these lesions in situ. Our early work in preclinical and clinical studies showed significant differences in spectral signatures between benign and malignant tumors ex vivo and in vivo. Our results also highlighted the limits the device, in terms of specificity, for certain types of lesions.Another study was conducted on mammary tumors in order to identify the major tissue entities at the origin of the spectral signatures obtained with our fibered device. Spectral imaging in confocal and second harmonic microscopy (SHG), in multiphoton, has been implemented in order to establish a mapping of endogenous biomarkers of mammary tissues. We compare its results with the data obtained with the fibered needle device in order to position it not only as an aid to diagnosis but also as a promising method for in situ histopathology
Milord, Laurent. "Dispositifs photoniques innovants pour le piégeage optique : Cavité étendue à double période et structure hybride cristal photonique-nano antenne". Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI026/document.
Texto completoSince the first work on optical tweezers by Ashkin, a lot of efforts have been made to trap nanoparticles. However, optical tweezers are diffraction limited and can hardly trap particles below 200 nm. This limit can be overstepped using the optical gradient forces of an evanescent field generated and amplified by a photonic nano cavity. Nonetheless, this approach faces two major issues for applications: the trapping section is very small, making the capture of a Brownian motion animated particle very unlikely, and for the “ultimate” nano antennas with nanometric optical modes, their excitation from free space is not effective. The goal of this work is to overcome these two difficulties. To increase the trapping surface, we will first present a device using slow Bloch modes within a double period extended cavity designed in a photonic crystal made out of SOI. We will show that this approach allow for the trapping of 200, 100 and 75 nm particles on an extended surface of 5x5 µm² using a free space laser beam excitation. Secondly, we will investigate the free space excitation of nanometric structures. A photonic crystal – nano antenna mixed structure will be presented, where the photonic crystal is used as a photon pool for the nano antenna. This lead to a funnel effect where the light coming from a large free space laser beam (5µm wide) is focused into the nano antenna. The trapping of 100 nm particles will demonstrate the relevance of this approach
Durantin, Cédric. "Métamodélisation et optimisation de dispositifs photoniques". Thesis, Université Côte d'Azur (ComUE), 2018. http://www.theses.fr/2018AZUR4036/document.
Texto completoNumerical simulation is widely employed in engineering to study the behavior of a device and optimize its design. Nevertheless, each computation is often time consuming and, during an optimization sequence, the simulation code is evaluated a large number of times. An interesting way to reduce the computational burden is to build a metamodel (or surrogate model) of the simulation code. Adaptive strategies are then set up for the optimization of the component using the metamodel prediction. In the context of this thesis, three representative devices are identified for applications that can be encountered within the CEA LETI optics and photonics department. The study of these cases resulted in two problems to be treated. The first one concerns multifidelity metamodeling, which consists of constructing a metamodel from two simulations of the same component that can be hierarchically ranked in accuracy. The simulations are obtained from different approximations of the physical phenomenon. The work on this method for the case of the photoacoustic cell has generated the development of a new multifidelity surrogate model based on radial basis function. The second problem relate to the consideration of manufacturing uncertainties in the design of photonic devices. Taking into account the differences observed between the desired geometry and the geometry obtained in manufacturing for the optimization of the component efficiency requires the development of a particular method for the case of the adiabatic coupler. The entire work of this thesis is capitalized in a software toolbox
Gaufillet, Fabian. "Cristaux photoniques à gradient : dispositifs et applications". Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112295.
Texto completoArtificially structured materials that are photonic crystals are commonly used for their dispersive properties. Their dielectric constant varies periodically across the wavelength in two or three directions with a sufficiently high index contrast. The resulting dispersion relation ω = ω(k) of the periodic variation has the form of a band structure within which there are photonic bandgaps in which the propagation of the electromagnetic field is prohibited. Outside of these bands, i.e. in the photonic band, there are the dispersion properties of the photonic crystals.The aim of this thesis is to design, fabricate and characterize graded photonic crystal devices. These devices were designed to be applied in areas ranging from microwaves to optics. We designed devices from photonic crystals with dispersive properties which make them similar to linear, homogeneous and isotropic media (LHI). In the unit cell of the LHI photonic crystal, we applied a gradient to achieve 1D graded lenses. Important results regarding the design, manufacturing and experimental characterization of a flat lens GRIN operating in X-band microwaves are deferred. This lens focuses an incident plane wave and collimates the wave emitted by a point source located in its focal plane. If this lens is itself a demonstrator and validates the approach implemented for the design, its potential applications particularly concern antennas. We also carry several 2D graded lenses including Lüneburg and Half Maxwell Fisheye lenses; their applications to the antennas are important. We are also interested in making optical graded index lenses called "SELFOC®".In order to confirm the remarkable dispersive properties that have been identified, we continued in that direction by revisiting a classic experiment that highlights the existence of evanescent waves: the "double right angle prism". We also highlight the phenomenon of "frustrated total internal reflection" and the shift discovered by Goos and Hänchen suffered by the reflected wave on the interface. It's these two points – frustrated total internal reflection and Goos-Hänchen effect - that we check in the case of LHI photonic crystals
Lepage, Dominic. "Dispositifs semi-conducteurs pour biodétection photonique et imagerie hyperspectrale". Thèse, Université de Sherbrooke, 2012. http://hdl.handle.net/11143/6626.
Texto completoMeneghini, Chiara. "Dispositifs photoniques plans à base de verres chalcogénures". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ51264.pdf.
Texto completoLi, Cheng. "Nouvelle filière nanotechnologique sur silicium poreux : Application à des dispositifs photoniques". Lyon, INSA, 2010. http://theses.insa-lyon.fr/publication/2010ISAL0033/these.pdf.
Texto completoPorous silicon is a very interesting material for biosensing applications : 1. It is a biocompatible material, 2. Its huge specific surface enhanced by many orders of magnitude the sensibility, 3. The refractive index could be easily and continuously tuned over a wide range. All these reasons make this material suitable for photonic devices. In a previous work, it has been shown that simple multiplayer devices could be used to realize a surface wave sensor that is by a least one order of magnitude more sensitive to equivalent surface plasmon devices. In this thesis, we want to go a step further by using photonic crystal structures. Using such structure, it is expected to increase the sensitivity and to realize more compact devices. However, etching a photonic crystal structure on porous silicon is a real technological challenge. The aim of this work is to confront this challenge
Pialat, Elodie. "Le Micro-usinage de dispositifs polymères à bande interdite photonique par faisceau d'ions". Limoges, 2004. http://aurore.unilim.fr/theses/nxfile/default/221048f5-8cc4-493d-9156-e51b053adce6/blobholder:0/2004LIMO0010.pdf.
Texto completo. The increase in the data transmission traffic imposes innovations. A solution considered is the Wavelenght Demultiplexing Method (WDM) Devices with photonic band gap lend themselves advantageously to the implementation of this technique, since they do not require any consumption of energy. Their manufacture in polymeric technology is the subject of this study. The first part of this work gives a progress report on the bands structures and on the electronic Valence Band Density Of State (VBDOS) of the organic materials use. The following part is devoted to comprehension of the physical phenomena related to the concept of crystal photonic, according to the models of : Yablonovitch and John. Then the theory of the plane waves expansion is developped and used to compute the photonic band gap structures. The 4th part is about the calculation and the manufacture of a focused ion beam machine, with a minimum beam diameter of 10nm, used to etch polymers. The last part exposes the conditions to etch 2D diffractive lattice in PMMA and CR39 according to the previously calculated dimensions
Chopin, Alexandre. "Photonic crystal sources of non-classical states of light". Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASP079.
Texto completoQuantum integrated photonics promises to bring quantum optics into a practical device. The primary objective of this area is to achieve scalable integration for various applications, including quantum computing, simulation, communication, and sensing. In a quantum circuit, photons, which are carriers of the quantum state, are generated, manipulated with linear and nonlinear components, and detected. The goal of this doctoral study is to contribute to the development of efficient and scalable sources of non-classical states of light, e.g: entanglement, single photons, and squeezing. To this purpose, we introduce a novel class of sources based on photonic crystal (PhC) resonators, and we demonstrate state-of-the-art performance in terms of efficiency and footprint. PhC cavities have been considered for quantum optics without, however, achieving remarkable performances. Therefore, micro-disks and rings have been commonly used as sources for integrated quantum photonics. Encouraged by the successful demonstration of the first Optical Parametric Oscillations (OPO) using a PhC cavity, we explored the potential application of this technology in the field of quantum optics. Below the threshold, OPO generates correlated photon pairs through a spontaneous parametric process, specifically spontaneous Four-Wave Mixing (SFWM). In particular, OPOs have been commonly utilized for generating entangled photon pairs and squeezed states. It is crucial that the cavity contains three equispaced modes that match the frequencies of the interacting photons, as this ensures maximum efficiency. Two geometries of PhC cavities have been considered: Nanobeam and Bichromatic, both made of Indium Gallium Phosphide. The main result is the ultra-efficient generation of time-correlated photon pairs. This confirmed our expectations based on the ultra-low threshold of the PhC OPO. Considering the state-of-the-art, we show that efficiency scales with the interaction volume in the cavity. Therefore, the origin of the very large efficiency is the very small volume of the PhC cavities. Moreover, this also implies a much-reduced footprint on the chip, which helps scalability. We have further characterized the properties of the generated photons, in particular time-energy entanglement, heralded single photons, and the emission of photon pairs in time-bins, an essential step towards demonstrating time-bin entanglement. Additionally, preliminary steps towards the generation of two-mode squeezed states have been undertaken. Besides, we have also considered the classical dynamics above OPO threshold by sampling its parameter space by performing measurements on a large number of devices. This allowed us to set a condition for OPO operation in agreement with a model highlighting the limiting role of non-linear absorption. We also revealed potential instabilities in the OPO operation. Finally, we started to address the question of scalability by performing a statistical analysis of over 650 cavities to study the impact of fabrication tolerances. So, we have demonstrated PhC cavity quantum sources with an exceptional level of efficiency. This suggests a promising new approach for the development of scalable sources within quantum integrated circuits
Libros sobre el tema "Dispositif photonique"
Peter, McPhee. A social history of France, 1780-1880. London: Routledge, 1993.
Buscar texto completoPhotonic Devices. Cambridge University Press, 2005.
Buscar texto completoLiu, Jia-ming. Photonic Devices. Cambridge University Press, 2005.
Buscar texto completoPhotonic Devices. Cambridge University Press, 2005.
Buscar texto completoAl-Azzawi, Abdul. Photonics: Principles and Practices (Optical Science and Engineering Series). CRC, 2006.
Buscar texto completoAl-Azzawi, Abdul. Photonics: Principles and Practices. Taylor & Francis Group, 2017.
Buscar texto completoAl-Azzawi, Abdul. Photonics: Principles and Practices. Taylor & Francis Group, 2017.
Buscar texto completoPhotonics: Principles and practices. Boca Raton, FL: CRC Press, 2007.
Buscar texto completoBinh, Le Nguyen. Photonic Signal Processing, Second Edition: Techniques and Applications. Taylor & Francis Group, 2019.
Buscar texto completoBinh, Le Nguyen. Photonic Signal Processing, Second Edition: Techniques and Applications. Taylor & Francis Group, 2019.
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