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Download Etude Et Realisation De Structures En Cristaux Photoniques Pour Les Applications De Traitement Du Signal Optique full books in PDF, epub, and Kindle. Read online Etude Et Realisation De Structures En Cristaux Photoniques Pour Les Applications De Traitement Du Signal Optique ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author :
Publisher :
ISBN 13 :
Total Pages : 752 pages
Book Rating : 4.:/5 (334 download)
Download or read book Annales des télécommunications written by and published by . This book was released on 2003-12 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sylvain Combrié
Publisher :
ISBN 13 :
Total Pages : 131 pages
Book Rating : 4.:/5 (494 download)
Download or read book Etude et réalisation de structures en cristaux photoniques pour les applications de traitement du signal optique written by Sylvain Combrié and published by . This book was released on 2006 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mon travail de thèse a porté sur des structures guidantes de semi-conducteurs III-V à base de cristaux photoniques, dans le contexte du traitement de signaux portés optiquement. Elles sont obtenues par gravure sèche exploitant une nouvelle gravure de type "ICP" où la densité du plasma y est contrôlée indépendamment de l'énergie cinétique des ions réactifs. Nous avons d'abord réalisé des trous profonds de haut rapport d'aspect, utiles en vue de l'intégration monolithique de plusieurs fonctions. L'hétérostructure utilisée présente l'originalité de ne pas comporter d'aluminium. Des mesures ont validés la qualité des technologies choisies. A l'occasion de ces efforts technologiques nous avons proposé une méthode de réalisation de membranes en GaAs. Les membranes ont la particularité de permettre des modes sans pertes. Nous avons pu, en collaboration avec le LPN, définir des rubans de grande longueur (>1 mm) sur lesquels nous avons effectué des mesures de transmission. Nous avons mis en évidence (i) de très faibles pertes de propagation et (ii) la baisse de la vitesse de groupe dans les "modes lents", descendant à des vitesses de c/11. Nous avons montré que ces structures pouvaient induire sur des signaux de quelques GHz des retards de phase de quelques dizaines de degrés, déphasage qu'on contrôle par le choix de la porteuse. On peut penser ainsi à des délais contrôlables miniatures. Enfin, nous avons intégré une cavité au voisinage d'un tel guide et avons montré le transfert résonnant avec des facteurs de qualités en couplage de ~28000, dont l'analyse suggère qu'ils correspondent à des facteurs de qualités intrinsèque de 43000, sensiblement à l'état de l'art mondial.
Author : Ahmed Belasri
Publisher : Springer Nature
ISBN 13 : 9811554447
Total Pages : 659 pages
Book Rating : 4.8/5 (115 download)
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author : Govind P. Agrawal
Publisher : Academic Press
ISBN 13 : 9780123695161
Total Pages : 560 pages
Book Rating : 4.6/5 (951 download)
Download or read book Nonlinear Fiber Optics written by Govind P. Agrawal and published by Academic Press. This book was released on 2007 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the 3rd edition appeared, a fast evolution of the field has occurred. The fourth edition of this classic work provides an up-to-date account of the nonlinear phenomena occurring inside optical fibers. The contents include such important topics as self- and cross-phase modulation, stimulated Raman and Brillouin scattering, four-wave mixing, modulation instability, and optical solitons. Many new figures have been added to help illustrate the concepts discussed in the book. New to this edition are chapters on highly nonlinear fibers and and the novel nonlinear effects that have been observed in these fibers since 2000. Such a chapter should be of interest to people in the field of new wavelengths generation, which has potential application in medical diagnosis and treatments, spectroscopy, new wavelength lasers and light sources, etc. Continues to be industry bestseller providing unique source of comprehensive coverage on the subject of nonlinear fiber optics Fourth Edition is a completely up-to-date treatment of the nonlinear phenomena occurring inside optical fibers Includes 2 NEW CHAPTERS on the properties of highly nonlinear fibers and their novel nonlinear effects
Author : OECD
Publisher : OECD Publishing
ISBN 13 : 9264545190
Total Pages : 152 pages
Book Rating : 4.2/5 (645 download)
Download or read book Artificial Intelligence in Society written by OECD and published by OECD Publishing. This book was released on 2019-06-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Author : John Wilfred Orton
Publisher :
ISBN 13 : 0199695822
Total Pages : 529 pages
Book Rating : 4.1/5 (996 download)
Download or read book Molecular Beam Epitaxy written by John Wilfred Orton and published by . This book was released on 2015 with total page 529 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is a history of Molecular Beam Epitaxy (MBE) as applied to the growth of semiconductor thin films (note that it does not cover the subject of metal thin films). It begins by examining the origins of MBE, first of all looking at the nature of molecular beams and considering their application to fundamental physics, to the development of nuclear magnetic resonance and to the invention of the microwave MASER. It shows how molecular beams of silane (SiH4) were used to study the nucleation of silicon films on a silicon substrate and how such studies were extended to compound semiconductors such as GaAs. From such surface studies in ultra-high vacuum the technique developed into a method of growing high quality single crystal films of a wide range of semiconductors. Comparing this with earlier evaporation methods of deposition and with other epitaxial deposition methods such as liquid phase and vapour phase epitaxy (LPE and VPE). The text describes the development of MBE machines from the early 'home-made' variety to that of commercial equipment and show how MBE was gradually refined to produce high quality films with atomic dimensions. This was much aided by the use of various in-situ surface analysis techniques, such as reflection high energy electron diffraction (RHEED) and mass spectrometry, a feature unique to MBE. It looks at various modified versions of the basic MBE process, then proceed to describe their application to the growth of so-called 'low-dimensional structures' (LDS) based on ultra-thin heterostructure films with thickness of order a few molecular monolayers. Further chapters cover the growth of a wide range of different compounds and describe their application to fundamental physics and to the fabrication of electronic and opto-electronic devices. The authors study the historical development of all these aspects and emphasise both the (often unexpected) manner of their discovery and development and the unique features which MBE brings to the growth of extremely complex structures with monolayer accuracy.
Author : Jin Huang
Publisher : John Wiley & Sons
ISBN 13 : 3527342699
Total Pages : 514 pages
Book Rating : 4.5/5 (273 download)
Download or read book Nanocellulose written by Jin Huang and published by John Wiley & Sons. This book was released on 2019-08-05 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensively introduces readers to the production, modifications, and applications of nanocellulose This book gives a thorough introduction to the structure, properties, surface modification, theory, mechanism of composites, and functional materials derived from nanocellulose. It also provides in-depth descriptions of plastics, composites, and functional nanomaterials specifically derived from cellulose nanocrystals, cellulose nanofibrils, and bacterial cellulose. It includes the most recent progress in developing a conceptual framework of nanocellulose, as well as its numerous applications in the design and manufacture of nanocomposites and functional nanomaterials. The book also looks at the relationship between structure and properties. Featuring contributions from many noted experts in the field, Nanocellulose: From Fundamentals to Advanced Materials examines the current status of nanocomposites based on nanocelluloses. It covers surface modification of nanocellulose in the nanocomposites development; reinforcing mechanism of cellulose nanocrystals in nanocomposites; and advanced materials based on self-organization of cellulose nanocrystals. The book studies the role of cellulose nanofibrils in nanocomposites, as well as a potential application based on colloidal properties of cellulose nanocrystals. It also offers strategies to explore biomedical applications of nanocellulose. Provides comprehensive knowledge on the topic of nanocellulose, including the preparation, structure, properties, surface modification and strategy Covers new reports on the application of nanocellulose Summarizes three kinds of nanocellulose (cellulose nanocrystals, cellulose nanofibrils, and bacterial cellulose) and their production, modification, and applications Nanocellulose: From Fundamentals to Advanced Materials is a useful resource for specialist researchers of chemistry, materials, and nanotechnology science, as well as for researchers and students of the subject.
Author : Sébastien Forget
Publisher : Springer
ISBN 13 : 3642367054
Total Pages : 179 pages
Book Rating : 4.6/5 (423 download)
Download or read book Organic Solid-State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Author : Barry R. Masters
Publisher : SPIE Press
ISBN 13 : 9780819461186
Total Pages : 236 pages
Book Rating : 4.4/5 (611 download)
Download or read book Confocal Microscopy and Multiphoton Excitation Microscopy written by Barry R. Masters and published by SPIE Press. This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text guides you through the principles and practical techniques of confocal and multiphoton microscopy. It also describes the historical connections and parallel inventions that resulted in modern techniques of live cell imaging and their use in biology and medicine. You will find comparisons of different types of confocal and multiphoton microscopes, solutions to the problems one would encounter when using various microscopic techniques, tips on selecting equipment, and an extensive annotated bibliography of additional resources.
Author : Alexander V. Sergienko
Publisher : CRC Press
ISBN 13 : 1420026607
Total Pages : 248 pages
Book Rating : 4.4/5 (2 download)
Download or read book Quantum Communications and Cryptography written by Alexander V. Sergienko and published by CRC Press. This book was released on 2018-10-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: All current methods of secure communication such as public-key cryptography can eventually be broken by faster computing. At the interface of physics and computer science lies a powerful solution for secure communications: quantum cryptography. Because eavesdropping changes the physical nature of the information, users in a quantum exchange can easily detect eavesdroppers. This allows for totally secure random key distribution, a central requirement for use of the one-time pad. Since the one-time pad is theoretically proven to be undecipherable, quantum cryptography is the key to perfect secrecy. Quantum Communications and Cryptography is the first comprehensive review of the past, present, and potential developments in this dynamic field. Leading expert contributors from around the world discuss the scientific foundations, experimental and theoretical developments, and cutting-edge technical and engineering advances in quantum communications and cryptography. The book describes the engineering principles and practical implementations in a real-world metropolitan network as well as physical principles and experimental results of such technologies as entanglement swapping and quantum teleportation. It also offers the first detailed treatment of quantum information processing with continuous variables. Technologies include both free-space and fiber-based communications systems along with the necessary protocols and information processing approaches. Bridging the gap between physics and engineering, Quantum Communications and Cryptography supplies a springboard for further developments and breakthroughs in this rapidly growing area.
Author : Jean-Baptiste Say
Publisher : Taylor & Francis
ISBN 13 : 1317912292
Total Pages : 290 pages
Book Rating : 4.3/5 (179 download)
Download or read book Jean-Baptiste Say and Political Economy written by Jean-Baptiste Say and published by Taylor & Francis. This book was released on 2016-11-10 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jean-Baptiste Say (1767–1832) was one of the first great economists to have laid down the foundations of economic science. Author of the famous Treatise on Political Economy in 1803, which was revised and re-edited on several occasions, he published numerous other works including a voluminous Complete Course in Practical Political Economy in 1828–9. He also taught political economy successively from 1815 until his death in three Parisian establishments: the Athénée, the Conservatory of Arts and Trades, and the Collège de France. The texts in which Say exposes his approach to political economy have not been available in the English language until now except for the fourth edition of the ‘Preliminary Discourse’ which serves as an introduction to the Treatise. This book presents a translation which renders his works accessible to the English speaking world. For the first time, English readers will be able to become directly immersed in Say’s principal texts, where he develops his conception of political economy. Jean-Baptiste Say and Political Economy proposes a translation of a selection of eleven of Say’s texts. The first three are versions of the ‘Preliminary Discourse’ from the Treatise’s editions of 1803, 1814 and 1826 with the variations of the editions of 1817, 1819 and 1841. The following four texts are the opening discourses pronounced at the Conservatory in 1820 and 1828 and the Collège de France in 1831 and 1832. The eighth text is the ‘General Considerations’ which open the Complete Course in Practical Political Economy of 1828, with the variations of the 1840 re-edition. The final three texts are those Say devotes to ‘the progress of political economy’ in what is akin to a history of economic thought. This volume is of great importance to economic historians and people studying Jean-Baptiste Say, as well as those who are interested in economic theory and philosophy and political economy.
Author : Agnes Buka
Publisher : World Scientific
ISBN 13 : 1848167997
Total Pages : 299 pages
Book Rating : 4.8/5 (481 download)
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author : OECD
Publisher : OECD Publishing
ISBN 13 : 9264305912
Total Pages : 132 pages
Book Rating : 4.2/5 (643 download)
Download or read book Government at a Glance Southeast Asia 2019 written by OECD and published by OECD Publishing. This book was released on 2019-09-10 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Government at a Glance Southeast Asia 2019 is the first edition in the Government at a Glance series for the region. It provides the latest available data on public administrations in the 10 ASEAN member countries: Brunei Darussalam, Cambodia, Indonesia, Lao People’s Democratic Republic, Malaysia, Myanmar, the Philippines, Singapore, Thailand and Viet Nam.
Author : Jean Daillant
Publisher : Springer Science & Business Media
ISBN 13 : 3540486968
Total Pages : 347 pages
Book Rating : 4.5/5 (44 download)
Download or read book X-Ray and Neutron Reflectivity: Principles and Applications written by Jean Daillant and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 347 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reflection of and neutrons from surfaces has existed as an x-rays exp- imental for almost it is in the last technique fifty Nevertheless, only years. decade that these methods have become as of enormously popular probes This the surfaces and interfaces. to be due to of several appears convergence of intense different circumstances. These include the more n- availability be measured orders tron and sources that can over (so reflectivity x-ray many of and the much weaker surface diffuse can now also be magnitude scattering of thin films and studied in some the detail); growing importance multil- basic the realization of the ers in both and technology research; important which in the of surfaces and and role roughness plays properties interfaces; the of statistical models to characterize the of finally development topology its and its characterization from on roughness, dependence growth processes The of and to surface scattering experiments. ability x-rays neutro4s study four five orders of in scale of surfaces over to magnitude length regardless their and also their to ability probe environment, temperature, pressure, etc. , makes these the choice for buried interfaces often probes preferred obtaining information about the microstructure of often in statistical a global surfaces, the local This is manner to complementary imaging microscopy techniques, of such studies in the literature witnessed the veritable by explosion published the last few Thus these lectures will useful for over a resource years.
Author : Pascal Filloux
Publisher :
ISBN 13 :
Total Pages : 156 pages
Book Rating : 4.:/5 (495 download)
Download or read book Etude et réalisation de structures bidimensionnelles à bandes photoniques interdites pour le domaine optique et proche infrarouge written by Pascal Filloux and published by . This book was released on 2001 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un cristal photonique est une structure composite dont l'arrangement des matériaux est périodique a l'échelle de la longueur d'onde. La périodicité permet l'apparition de bandes photoniques interdites : domaines de fréquences pour lesquels la lumière ne peut pas se propager dans la structure, quelles que soient sa polarisation et sa direction de propagation. Deux types de dispositifs mettant en ceuvre des cristaux photoniques à deux dimensions ont été étudiés, pour les longueurs d'onde des télécommunications optiques entre 1,3 et l,55mM. Leur modélisation utilise la méthode mathematique rigoureuse des ondes couplées (RCWA). Le premier composant, pour l'optique guidée, utilise un substrat de silicium sur isolant (SOI). Le cristal photonique à deux dimensions est gravé dans le film de silicium : des réseaux de diffraction permettent le couplage et le découplage de la lumière dans le guide. Plusieurs types de substrats ont été considérés pour lesquels nous avons étudié la propagation des ondes guidées puis avons dîmensionné les coupleurs et le enstal photonique. Pour modéliser ces cristaux, en optique intégrée, nous avons utilisé un calcul approché basé sur la méthode RCWA qui permet de déterminer avec une bonne approximation leurs propriétés optiques. Un deuxième composant a été étudié et réalisé pour l'optique diffractive. Il est obtenu en gravant un réseau de traits dans une ou plusieurs des couches d'un empilement périodique. Lorsque toutes les couches sont gravees, ces structures, possédant deux directions de périodicité et constituées de trois matériaux différents, constituent des cristaux photoniques 2D non conventionnels. Nous avons montré la possibilité de réaliser, avec ces structures, des miroirs, des filtres, polarisants ou non, dispersifs ou non. Nous avons montré la faisabilité des structures multicouches (silicium / nitrure de silicium) gravées sur membrane en utilisant la gravure par faisceau d'ions focalisé.
Author : Jean-François Semblat
Publisher : Iuss Press
ISBN 13 :
Total Pages : 510 pages
Book Rating : 4.F/5 ( download)
Download or read book Waves and Vibrations in Soils written by Jean-François Semblat and published by Iuss Press. This book was released on 2009 with total page 510 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Oleg N. Kirillov
Publisher :
ISBN 13 : 9783110270341
Total Pages : 0 pages
Book Rating : 4.2/5 (73 download)
Download or read book Nonconservative Stability Problems of Modern Physics written by Oleg N. Kirillov and published by . This book was released on 2013 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work gives a complete overview on the subject of nonconservative stability from the modern point of view. Relevant mathematical concepts are presented, as well as rigorous stability results and numerous classical and contemporary examples from mechanics and physics. It deals with both finite- and infinite-dimensional nonconservative systems and covers the fundamentals of the theory, including such topics as Lyapunov stability and linear stability analysis, Hamiltonian and gyroscopic systems, reversible and circulatory systems, influence of structure of forces on stability, and dissipation-induced instabilities, as well as concrete physical problems, including perturbative techniques for nonself-adjoint boundary eigenvalue problems, theory of the destabilization paradox due to small damping in continuous circulatory systems, Krein-space related perturbation theory for the MHD kinematic mean field α -dynamo, analysis of Campbell diagrams and friction-induced flutter in gyroscopic continua, non-Hermitian perturbation of Hermitian matrices with applications to optics, and magnetorotational instability and the Velikhov-Chandrasekhar paradox. The book serves present and prospective specialists providing the current state of knowledge in the actively developing field of nonconservative stability theory. Its understanding is vital for many areas of technology, ranging from such traditional ones as rotor dynamics, aeroelasticity and structural mechanics to modern problems of hydro- and magnetohydrodynamics and celestial mechanics.
