Download or read book Compl tudes des modes T E et T M pour un guide d ondes optiques planaire written by Institut national de recherche en informatique et en automatique (France). and published by . This book was released on 1985 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compl tude des modes T E et T M pour un guide d ondes optiques planaire written by J. C. Guillot and published by . This book was released on 1985 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book COUPLAGE D ONDES DANS UN GUIDE PLANAIRE DE TITANATE DE BARYUM written by JEAN-LOUIS.. BOLZINGER and published by . This book was released on 1996 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE GUIDE D'ONDE PLANAIRE EST L'ELEMENTS DE BASE DE L'OPTIQUE INTEGREE. LE TITANATE DE BARYUM (BATIO#3), CRISTAL UNIAXE, PRESENTANT DES PROPRIETES ELECTRO-OPTIQUES ET PHOTOREFRACTIVES TRES IMPORTANTES EST POTENTIELLEMENT UTILISABLE DANS LE TRAITEMENT DE L'INFORMATION. C'EST POURQUOI NOUS PRESENTONS UNE ETUDE DE BATIO#3 MONOCRISTALLIN ET MONODOMAINE EN COUCHE MINCE. LE DISPOSITIF EXPERIMENTAL CONCU ET REALISE AU COURS DE CE TRAVAIL PERMET D'EFFECTUER LES SPECTROSCOPIES DE LIGNES DE MODES (LIGNES NOIRES ET LIGNES BRILLANTES) D'UN GUIDE PLANAIRE QUELCONQUE. IL MESURE EGALEMENT LE COUPLAGE ENTRE MODES. LE MONTAGE EST MOTORISE ET INFORMATISE DE FACON A RENDRE L'ACQUISITION DES SPECTRES TOTALEMENT AUTOMATIQUE. LES INDICES EFFECTIFS DES MODES SONT DETERMINES AVEC UNE INCERTITUDE ABSOLUE DE 4.10#-#4. LE GUIDE D'ONDE EST REALISE PAR IMPLANTATION D'IONS HYDROGENES SUR UN SUBSTRAT MONOCRISTALLIN ET MONODOMAINE DE BATIO#3, ORIENTE DE FACON A CE QUE L'AXE OPTIQUE SOIT DANS LE PLAN DU GUIDE. NOUS ETUDIONS L'INFLUENCE DE LA DIRECTION DE PROPAGATION ET DE LA LONGUEUR D'ONDE SUR LES SPECTRES DE MODES TE ET TM. PAR UNE ANALYSE FINE DE LA LUMIERE TRANSMISE, NOUS MONTRONS POUR LA PREMIERE FOIS AVEC BATIO#3, L'EXISTENCE D'UN COUPLAGE FAIBLE ENTRE MODES (TE/TE, TM/TM ET TE/TM). LES PROFILS D'INDICE SONT RECONSTRUIT PAR DEUX METHODES: WKB INVERSE CONSTRUISANT DES PROFILS VARIANT ASSEZ LENTEMENT ET STRICTEMENT DECROISSANTS, ET MFG (METHODE MATRICIELLE) QUI DONNE DES PROFILS ASSEZ ABRUPTS ET DECRIT LA REMONTEE D'INDICE AU-DELA DE LA BARRIERE D'IMPLANTATION. LA BARRIERE D'INDICE SE SITUE A UNE PROFONDEUR DE 10 MICRONS ET POSSEDE UNE AMPLITUDE DE 0,163 ET DE 0,036 RESPECTIVEMENT POUR LES INDICES ORDINAIRE ET EXTRAORDINAIRE. CES ETUDES, MONTRENT QUE SOUS L'EFFET DES DEFORMATIONS INDUITES PAR L'IMPLANTATION, LES PROPRIETES ELASTO-OPTIQUES DE BATIO#3 RENDENT LE GUIDE D'ONDE LEGEREMENT BIAXE
Download or read book CARACTERISATIONS OPTIQUES DE GUIDES D ONDES PLANAIRES PHOTOREFRACTIFS APPLICATION AUX DISPOSITIFS INTEGRES DE TRAITEMENT OPTIQUE DE L INFORMATION written by ALEXANDRE.. DAZZI and published by . This book was released on 1998 with total page 173 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES BESOINS DE L'OPTIQUE INTEGREE POUSSENT A TRANSFERER LES FONCTIONS (AMPLIFICATION D'ONDES, DOUBLAGE DE FREQUENCE, ETC) REALISEES DANS LES MATERIAUX VOLUMIQUES AUX GUIDES D'ONDES. DANS CE TRAVAIL, NOUS MODELISONS LA PROPAGATION DE LA LUMIERE DANS DES GUIDES A BARRIERE D'INDICE EN TENANT COMPTE DE L'ANISOTROPIE DU MILIEU. CES MODELES NOUS PERMETTENT D'ADAPTER LES PARAMETRES OPTOGEOMETRIQUES DES GUIDES AFIN D'OBTENIR DES MODES SANS FUITE ET DE MINIMISER LE COUPLAGE ENTRE LES MODES TE ET TM. LES ETUDES DE SPECTROSCOPIE LIGNES NOIRES ET LIGNES BLANCHES AINSI QUE L'ETUDE DU CONFINEMENT DES MODES (OU FUITES D'ENERGIE) DE PLUSIEURS ECHANTILLONS DE LINBO#3 ET BATIO#3 IMPLANTES H#+ ET HE#+, NOUS CONDUISENT A SELECTIONNER DEUX GUIDES PERMETTANT LA PROPAGATION D'ONDES TE DANS TOUTES LES DIRECTIONS DU GUIDE PLANAIRE. LES RESULTATS DU MELANGE D'ONDES DANS LE GUIDE DE LINBO#3 IMPLANTE HE#+, MONTRENT QUE L'AMPLIFICATION D'ONDES EST REGIE PAR DEUX PHENOMENES DIFFERENTS : L'EFFET PHOTOVOLTAIQUE ET L'EFFET DIFFUSIF. LES PROPRIETES PHOTOREFRACTIVES DU GUIDE SONT TRES DIFFERENTES DE CELLES DES CRISTAUX VOLUMIQUES DANS LA MESURE OU LES PHENOMENES PHOTOVOLTAIQUES NE SONT PAS DOMINANTS. LES RESULTATS DU MELANGE D'ONDES LE GUIDE DE BATIO#3 IMPLANTE HE#+ INDIQUENT QUE L'AMPLIFICATION EST ASSEZ IMPORTANTE (GAIN DE 80 CM##1) ET QUE L'EFFICACITE D'ATTENUATION DE L'ONDE POMPE (90%) PERMET D'ENVISAGER LA REALISATION DE FILTRE DE NOUVEAUTE DANS LE GUIDE. LES PHENOMENES PHOTOREFRACTIFS DANS LE GUIDE SONT TRES DIFFERENTS DE CEUX DU CRISTAL : TEMPS DE REPONSE 1000 FOIS PLUS COURT, SENS DU TRANSFERT D'ENERGIE INVERSE, PHOTOCONDUCTIVITE PLUS IMPORTANTE.
Download or read book Optical Properties Of Graphene written by Rolf Binder and published by World Scientific. This book was released on 2016-11-11 with total page 517 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive state-of-the-art overview of the optical properties of graphene. During the past decade, graphene, the most ideal and thinnest of all two-dimensional materials, has become one of the most widely studied materials. Its unique properties hold great promise to revolutionize many electronic, optical and opto-electronic devices. The book contains an introductory tutorial and 13 chapters written by experts in areas ranging from fundamental quantum mechanical properties to opto-electronic device applications of graphene.
Download or read book An Introduction To Plasmonics written by Olivier Pluchery and published by World Scientific. This book was released on 2023-08-28 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: What is a plasmon? Is it a particle, like a photon or a wave? Plasmonics stands at the frontier of condensed matter physics, which is the world of electrons, optics and of photons. Plasmonics is one of the most active fields in nanophotonics. This book begins by exploring the concepts behind waves, and the electromagnetic description of light when it interacts with metals; it dedicates every chapter thereafter to all aspects of plasmonics. In particular, the surface plasmon polariton wave is explained in full detail, as well as the localized surface plasmon resonance of metallic nanoparticles. The active research area opened by plasmonics, as well as its applications, are also briefly explained, such as advanced biosensing, subwavelength waveguiding, quantum plasmonics, nanoparticle-based cancer therapies, optical nano-antenna and high-efficiency photovoltaic cells.The book is adapted for graduate students and places a special emphasis on providing complete explanations of the fundamental concepts of plasmonics. Further, each of these concepts is illustrated with examples drawn from the most recent scientific literature. Each chapter ends with a set of exercises that will help the reader revise the concepts and go deeper into the world of plasmonics. More than 70 exercises are included.
Download or read book Experimental Chaos written by Stefano Boccaletti and published by A I P Press. This book was released on 2004-12-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th Experimental Chaos Conference again demonstrated the broad spectrum of areas where nonlinear dynamics plays an important role, such as circuits, hydrodynamics, optics, chemistry, fracture dynamics, neuroscience, and cognitive science. Additional contributions outline the trends for development and application of concepts and techniques of nonlinear dynamics.
Download or read book Single Photon Manipulation written by Keyu Xia and published by BoD – Books on Demand. This book was released on 2020-11-11 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This short book aims to present basic information about single photons in a quick read but with not many details. For this purpose, it only introduces the basic concept of single photons, the most important method of generating single photons in experiments, and a specific emerging field.
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.
Download or read book Ultra Wide Band Antennas written by Xavier Begaud and published by John Wiley & Sons. This book was released on 2013-03-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Download or read book Low Frequency Scattering written by George Dassios and published by Oxford University Press. This book was released on 2000 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scattering theory deals with the interactions of waves with obstacles in their path, and low frequency scattering occurs when the obstacles involved are very small. This book gives an overview of the subject for graduates and researchers, for the first time unifying the theories covering acoustic, electromagnetic and elastic waves.
Download or read book Building Wireless Community Networks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.
Download or read book MIMO written by Alain Sibille and published by Academic Press. This book was released on 2010-12-03 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Download or read book Quantum Theory of Finite Systems written by Jean-Paul Blaizot and published by Mit Press. This book was released on 1986 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive and pedagogical account of the various methods used in the quantum theory of finite systems, including molecular, atomic, nuclear, and particle phenomena. Covering both background material and advanced topics and including nearly 200 problems, Quantum Theory of Finite Systems has been designed to serve primarily as a text and will also prove useful as a reference in research. The first of the book's four parts introduces the basic mathematical apparatus: second quantization, canonical transformations, Wick theorems and the resulting diagram expansions, and oscillator models. The second part presents mean field approximations and the recently developed path integral methods for the quantization of collective modes. Part three develops perturbation theory in terms of both time-dependent Feynman diagrams and time-independent Goldstone diagrams. A fourth part discusses variational methods based on correlated wavefunctions, including spin correlations. The approximation schemes are formulated for fermions and bosons at eigher zero or non-zero temperature. Although the formalism developed applies to both finite and infinite systems, the book stresses those aspects of the theory that are specific to the description of finite systems. Thus special attention is given to mean field approximations, the ensuing broken symmetries, and the associated collective motions such as rotations. Conversely, some specific features of systems with infinite numbers of degrees of freedom (such as the thermodynamic limit, critical phenomena, and the elimination of ultraviolet divergencies) are deliberately omitted. Jean-Paul Blaizot and Georges Ripka are associated with the Centre d'Etudes Nucleaires de Saclay.
Download or read book Phytochemicals in Nutrition and Health written by Mark S. Meskin and published by CRC Press. This book was released on 2002-03-19 with total page 221 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are soy isoflavones neuroprotective? Just how different is one species of Echinacea from another? Which phytochemicals will be effective as therapeutic agents in vivo? Supported by solid scientific research, Phytochemicals in Nutrition and Health helps provide answers to these and other probing questions concerning the mechanisms of action associat
Download or read book Wireless Hacks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Continuing with the successful Hack Series, this title provides real-world working examples of how to make useful things happen with wireless equipment.
Download or read book Light Filaments written by Jean-Claude Diels and published by IET. This book was released on 2022 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edited volume starts with tutorials about the science of filamentation before presenting in-depth chapters on the latest research, technologies and applications. It cover wide aspects of light filaments considering various mediums of propagation, with structured or single filaments, and filaments of different colours, as well as combined filaments. It also includes a wide range of applications from strong field ionisation and molecular properties to laser development and beam shaping, THz, lasing in air and supercontinuum generation.
