Download or read book SPECTROSCOPIE D HETEROSTRUCTURES PIEZO ELECTRIQUES INGA AS GAAS 111 B written by PHILIPPE.. BALLET and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE MEMOIRE CONTIENT UNE ANALYSE EXPERIMENTALE ET THEORIQUE DES PROPRIETES ELECTRONIQUES ET OPTIQUES D'HETEROSTRUCTURES PIEZO-ELECTRIQUES IN#0#,#1#5GA#0#,#8#5AS/GAAS (111)B ELABOREES SOUS JETS MOLECULAIRES. LES TECHNIQUES SPECTROSCOPIQUES UTILISEES SONT LA PHOTOLUMINESCENCE, LA REFLECTIVITE, L'ABSORPTION OPTIQUE DETECTEE THERMIQUEMENT ET DEUX TECHNIQUES DE MODULATION : LA PHOTOREFLECTIVITE ET L'ELECTROREFLECTIVITE. LA PRESENCE DE CHAMPS ELECTRIQUES INTENSES D'ORIGINE PIEZO-ELECTRIQUE DANS LES COUCHES CONTRAINTES PROVOQUE DES CHANGEMENTS IMPORTANTS DANS LA STRUCTURE DE BANDES ET A POUR CONSEQUENCE LA MODIFICATION DES ENERGIES DE TRANSITION (EFFET STARK CONFINE QUANTIQUE) ET DE LEUR PROBABILITES. UNE ETUDE PAR PHOTOLUMINESCENCE DES EFFETS D'INJECTION DE PHOTOPORTEURS DANS CES STRUCTURES A PERMIS DE METTRE EN EVIDENCE DES PHENOMENES D'ACCUMULATION DE PORTEURS HORS DES PUITS QUANTIQUES. DES ETUDES PAR PHOTOREFLECTIVITE ONT CONFIRME, PAR ANALYSE DES OSCILLATIONS DE FRANZ-KELDYSH, L'AUGMENTATION DU CHAMP PIEZO-ELECTRIQUE LORSQUE LA TEMPERATURE D'EXPERIENCE S'ELEVE. DES EXPERIENCES D'ELECTROREFLECTIVITE ET ABSORPTION OPTIQUE DETECTEE THERMIQUEMENT, ASSOCIEES A LA MODELISATION DES PROPRIETES EXCITONIQUES, ONT CONDUIT A UNE DETERMINATION PRECISE DE LA VALEUR DU CHAMP PIEZO-ELECTRIQUE : 165 KV.CM#-#1. LA CONSTANTE PIEZO-ELECTRIQUE E#1#4 DEDUITE EST 30% INFERIEURE A LA VALEUR ATTENDUE PAR INTERPOLATION LINEAIRE ENTRE CELLES DES BINAIRES INAS ET GAAS. LA PRISE EN COMPTE DU PHENOMENE DE SEGREGATION DES ATOMES D'INDIUM EN SURFACE REDUIT DE MOITIE CE DESACCORD ET PERMET UNE BONNE DESCRIPTION DES ETATS EXCITES. LA COMPARAISON DES FORCES D'OSCILLATEUR EXPERIMENTALES, DEDUITES DES SPECTRES D'ELECTROREFLECTIVITE, AVEC CELLES CALCULEES PAR UNE METHODE VARIATIONNELLE CONDUIT A UNE DESCRIPTION QUALITATIVE DES EFFETS DE CHAMP ELECTRIQUES.

Download or read book Nondestructive Materials Characterization written by Norbert G. H. Meyendorf and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an emphasis on aircraft materials, this book describes techniques for the material characterization to detect and quantify degradation processes such as corrosion and fatigue. It introduces readers to these techniques based on x-ray, ultrasonic, optical and thermal principles and demonstrates the potential of the techniques for a wide variety of applications concerning aircraft materials, especially aluminum and titanium alloys. The advantages and disadvantages of various techniques are evaluated.

Download or read book Real Time Image and Video Processing written by Nasser Kehtarnavaz and published by Springer Nature. This book was released on 2022-06-01 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an overview of the guidelines and strategies for transitioning an image or video processing algorithm from a research environment into a real-time constrained environment. Such guidelines and strategies are scattered in the literature of various disciplines including image processing, computer engineering, and software engineering, and thus have not previously appeared in one place. By bringing these strategies into one place, the book is intended to serve the greater community of researchers, practicing engineers, industrial professionals, who are interested in taking an image or video processing algorithm from a research environment to an actual real-time implementation on a resource constrained hardware platform. These strategies consist of algorithm simplifications, hardware architectures, and software methods. Throughout the book, carefully selected representative examples from the literature are presented to illustrate the discussed concepts. After reading the book, the readers are exposed to a wide variety of techniques and tools, which they can then employ to design a real-time image or video processing system.

Download or read book Semiconductor Lasers I written by Eli Kapon and published by Academic Press. This book was released on 1999-01-12 with total page 467 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the device physics of semiconductor lasers in five chapters written by recognized experts in this field. The volume begins by introducing the basic mechanisms of optical gain in semiconductors and the role of quantum confinement in modern quantum well diode lasers. Subsequent chapters treat the effects of built-in strain, one of the important recent advances in the technology of these lasers, and the physical mechanisms underlying the dynamics and high speed modulation of these devices. The book concludes with chapters addressing the control of photon states in squeezed-light and microcavity structures, and electron states in low dimensional quantum wire and quantum dot lasers. The book offers useful information for both readers unfamiliar with semiconductor lasers, through the introductory parts of each chapter, as well as a state-of-the-art discussion of some of the most advanced semiconductor laser structures, intended for readers engaged in research in this field. This book may also serve as an introduction for the companion volume, Semiconductor Lasers II: Materials and Structures, which presents further details on the different material systems and laser structures used for achieving specific diode laser performance features. - Introduces the reader to the basics of semiconductor lasers - Covers the fundamentals of lasing in semiconductors, including quantum confined and microcavity structures - Beneficial to readers interested in the more general aspects of semiconductor physics and optoelectronic devices, such as quantum confined heterostructures and integrated optics - Each chapter contains a thorough introduction to the topic geared toward the non-expert, followed by an in-depth discussion of current technology and future trends - Useful for professionals engaged in research and development - Contains numerous schematic and data-containing illustrations

Download or read book Dielectric Metamaterials written by Igal Brener and published by Woodhead Publishing. This book was released on 2019-10-15 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dielectric Metamaterials: Fundamentals, Designs and Applications links fundamental Mie scattering theory with the latest dielectric metamaterial research, providing a valuable reference for new and experienced researchers in the field. The book begins with a historical, evolving overview of Mie scattering theory. Next, the authors describe how to apply Mie theory to analytically solve the scattering of electromagnetic waves by subwavelength particles. Later chapters focus on Mie resonator-based metamaterials, starting with microwaves where particles are much smaller than the free space wavelengths. In addition, several chapters focus on wave-front engineering using dielectric metasurfaces and the nonlinear optical effects, spontaneous emission manipulation, active devices, and 3D effective media using dielectric metamaterials. Highlights a crucial link in fundamental Mie scattering theory with the latest dielectric metamaterial research spanning materials, design and applications Includes coverage of wave-front engineering and 3D metamaterials Provides computational codes for calculating and simulating Mie resonances

Download or read book Optical Glass written by Peter Hartmann and published by . This book was released on 2014-01-01 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 400 years, optical glass has provided mankind with a window into both the hidden microcosm and vast outer cosmos of the known universe, transforming philosophy, science, and engineering through its visage and, thus, shaping modern civilization. Its high transmittance, homogeneity, and precisely defined light refraction properties are the preconditions for highly resolved true-color imaging, making it an intrinsic component of technology in general. From consumer products, such as cameras and binoculars, to microscopes and telescopes-the most essential tools of research in many fields-the role of optical glass is integral to the very foundations of modern science and industry.

Download or read book Quantum and Nonlinear Optics written by Qihuang Gong and published by SPIE-International Society for Optical Engineering. This book was released on 2010 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes Proceedings Vol. 7821

Download or read book Semiconductor Laser Dynamics written by Daan Lenstra and published by . This book was released on 2020-09-10 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a collection of 18 papers, two of which are reviews and seven are invited feature papers, that together form the Photonics Special Issue "Semiconductor Laser Dynamics: Fundamentals and Applications", published in 2020. This collection is edited by Daan Lenstra, an internationally recognized specialist in the field for 40 years.

Download or read book The Properties of Optical Glass written by Hans Bach and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the reviews: "The book should be acquired by all libraries with an interest in glass science and applications...the title will endure for many years as the standard work on the properties of optical glass." Optical Systems Engineering