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Non Linearites Optiques Dans Des Semiconducteurs A Faible Largeur De Bande Interdite
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Book Synopsis NON-LINEARITES OPTIQUES DANS DES SEMICONDUCTEURS A FAIBLE LARGEUR DE BANDE INTERDITE by : JEROME.. JEANROT
Download or read book NON-LINEARITES OPTIQUES DANS DES SEMICONDUCTEURS A FAIBLE LARGEUR DE BANDE INTERDITE written by JEROME.. JEANROT and published by . This book was released on 1996 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE EST CONSACRE A L'ETUDE DES NON-LINEARITES OPTIQUES DANS LES SEMICONDUCTEURS A FAIBLE LARGEUR DE BANDE INTERDITE DANS LE CADRE D'UNE APPLICATION A LA LIMITATION OPTIQUE DANS L'INFRA-ROUGE. EN REGIME NANOSECONDE, LES PORTEURS LIBRES EN EXCES CREES PAR ABSORPTION A DEUX PHOTONS DANS LES MATERIAUX INSB ET HGCDTE SONT A L'ORIGINE DES PRINCIPAUX MECANISMES DE REFRACTION NON-LINEAIRE. NOUS PROPOSONS UNE ETUDE DU COMPORTEMENT DES PORTEURS LIBRES PHOTO-INDUITS PAR PHOTOCONDUCTIVITE SOUS FLUX LASER CO#2 QUI PERMET DE CONCLURE SUR LA DEPENDANCE DU NOMBRE DE PORTEURS EN FONCTION DE L'INTENSITE INCIDENTE. LES EFFETS D'AUTO-DEFOCALISATION D'ORIGINE ELECTRONIQUE SONT ETUDIES A L'AIDE D'UNE EXPERIENCE DE Z-SCAN A UN SEUL FAISCEAU. UN MODELE INCLUANT LES RESULTATS DE PHOTOCONDUCTIVITE PERMET DE RENDRE COMPTE DES EXPERIENCES ET D'EVALUER UN COEFFICIENT NON-LINEAIRE CORRESPONDANT A UNE VARIATION D'INDICE PAR PAIRE ELECTRON-TROU ET PAR UNITE DE VOLUME. LES VARIATIONS D'INDICE D'ORIGINE THERMIQUE PROVENANT DE L'ABSORPTION DU FLUX INCIDENT SONT EVALUEES PAR L'INTERMEDIAIRE D'UNE EXPERIENCE DE Z-SCAN A DEUX FAISCEAUX EN CONFIGURATION POMPE-SONDE. LES EXPERIENCES ET MODELES DEVELOPPES DANS CE MEMOIRE DEMONTRENT L'EFFICACITE DES MECANISMES NON-LINEAIRES DANS LES SEMI-CONDUCTEURS A FAIBLE GAP POUR LA LIMITATION OPTIQUE ET LA POSSIBILITE D'ETENDRE CETTE ETUDE A D'AUTRES MATERIAUX OU ENCORE D'AUTRES BANDES SPECTRALES
Book Synopsis Étude des non-linéarités optiques dynamiques dans les semiconducteurs III-V by : Juan Ariel Levenson
Download or read book Étude des non-linéarités optiques dynamiques dans les semiconducteurs III-V written by Juan Ariel Levenson and published by . This book was released on 1988 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nous avons étudié les interactions entre porteurs dans des multi-puits quantiques de GaAs/GaA1As sous fane excitation optique.Un dispositif expérimental comprenant deux sources infrarouges d'impulsions brèves (10 ps), intenses (100 MW/cm2) et indépendamment accordables en longueur d'onde, a été utilisé à cet effet.Des méthodes expérimentales de spectroscopie non-linéaire, nous ont permis d'isoler les non-linéarités optiques dues aux effets à N-corps (écrancage de l'interaction coulombienne et renormalisation des mini-bandes), de celles dont l'origine est due à l'encombrement de l'espace de phases des porteurs. Les non-linéarités optiques dues à l'occupation des états à une particule se sont avérées très intenses comparées aux effets à N-corps. L'écrantage de l'interaction coulombienne à quasi-deux dimensions a été trouvé plus faible que celui du massif. Des mesures de la renormalisation des mini-bandes élevées (obtenues en absorption) comparées aux mesures de la renormalisation du plasma (obtenues en luminescence) nous ont permis d'établir les limites de l 'approximation du déplacement rigide, communément employée pour décrire la renormalisation de la bande interdite. La dynamique de relaxation inter-bande des porteurs a pu être résolue : nous avons mis en évidence un temps caractéristique de ce processus de l'ordre de 20 ps.
Book Synopsis Exposés Et Communications Présentés À Montpellier Les 5, 6 Et 7 Septembre 1973 Au Colloque Sur Les Propriétés Optiques Des Semiconducteurs À Grande Bande Interdite by :
Download or read book Exposés Et Communications Présentés À Montpellier Les 5, 6 Et 7 Septembre 1973 Au Colloque Sur Les Propriétés Optiques Des Semiconducteurs À Grande Bande Interdite written by and published by . This book was released on 1974 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de physique written by and published by . This book was released on 1974 with total page 1098 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Book Synopsis Experimental Chaos by : Stefano Boccaletti
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.
Book Synopsis Quantum Communications and Cryptography by : Alexander V. Sergienko
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.
Download or read book JP III written by and published by . This book was released on 1992 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Organic Solid-State Lasers by : Sébastien Forget
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.
Book Synopsis Ultra Wide Band Antennas by : Xavier Begaud
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 ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
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)
Book Synopsis Quantum Theory of Finite Systems by : Jean-Paul Blaizot
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.
Book Synopsis Pervasive Mobile and Ambient Wireless Communications by : Roberto Verdone
Download or read book Pervasive Mobile and Ambient Wireless Communications written by Roberto Verdone and published by Springer Science & Business Media. This book was released on 2012-01-02 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Book Synopsis Laser: 50 Years Of Discoveries by : Fabien Bretenaker
Download or read book Laser: 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Book Synopsis Physical Properties of Amorphous Materials by : David Adler
Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Download or read book Acta electronica written by and published by . This book was released on 1979 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
