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Caracterisation Optique Et Structurale De Guides Dondes Non Lineaires Gaas Aiox
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Book Synopsis Caractérisation optique et structurale de guides d'ondes non-linéaires GaAs/AIOx by : Erwan Guillotel
Download or read book Caractérisation optique et structurale de guides d'ondes non-linéaires GaAs/AIOx written by Erwan Guillotel and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse a porté sur la réalisation et la caractérisation d'une source paramétrique guidée en GaAs/AlGaAs. Grâce à son design, basé sur la biréfringence de forme, celle-ci permet la génération paramétrique sur une gamme spectrale allant de 1.2 à 2.4 μ m. Cette propriété optique et sa taille réduite font d'un tel dispositif un candidat pour la fabrication d'un oscillateur paramétrique optique cm"1 suite à l'oxydation sélective des couches riches en aluminium, les transformant en AlOx. A travers une étude par microscopie électronique en transmission, nous avons tout d'abord caractérisé les propriétés structurales et chimiques de l'AlOx et des interfaces GaAs/AlOx. Nous avons ainsi constaté une augmentation de la rugosité de ces interfaces et une modification locale des couches de GaAs induites par l'étape d'oxydation. Dans un second temps, nous avons caractérisé certaines propriétés optiques des guides d'ondes. Un calcul semi-analytique nous a permis d'établir la valeur des pertes de propagation, en bon accord avec les mesures expérimentales, induite par la rugosité des interfaces GaAs/AlOx. Nous avons ensuite établi les conditions d'oxydation optimales en mesurant systématiquement les pertes de propagation. Nous avons caractérisé les performances de notre source en effectuant la première mesure d'amplification paramétrique dans un guide d'ondes semi-conducteur. Le coefficient de gain paramétrique mesuré, compatible avec l'obtention de l'oscillation paramétrique, nous a amené à concevoir, fabriquer et caractériser différentes cavités résonnantes.
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.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
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.
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 Third-Generation Femtosecond Technology by : Hanieh Fattahi
Download or read book Third-Generation Femtosecond Technology written by Hanieh Fattahi and published by Springer. This book was released on 2015-08-28 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis offers a thorough and informative study of high-power, high-energy optical parametric chirped pulse amplifications systems, the foundation of the next generation of femtosecond laser technology. Starting from the basics of the linear processes involved and the essential design considerations, the author clearly and systematically describes the various prerequisites of the nonlinear optical systems expected to drive attosecond physics in the coming decade. In this context, he gives an overview of methods for generating the broadband and carrier-envelope-phase stable seed pulses necessary for producing controlled electric-field waveforms in the final system; provides a guide to handling the high-power, high-energy pump lasers required to boost the pulse energy to the desired operating range; describes the design of the nonlinear optical system used to perform the amplification, including modes of operation for ultra-broadband infrared-visible pulses or narrowband (yet still ultrafast) pulses tunable over multiple octaves; and finally presents a prospective high-energy field synthesizer based upon these techniques. As such, this work is essential reading for all scientists interested in utilizing the newest generation of ultrafast systems.
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 Nonlinear Optical Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Book Synopsis Poetry and History by : Ramzī Baʻlabakkī
Download or read book Poetry and History written by Ramzī Baʻlabakkī and published by . This book was released on 2011 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: The premise of the conference was to exploit the immense riches of Arabic poetry in the reconstruction of Arab history. The history considered includes both 'event history' and the history of culture in its widest sense. Poetry included in this examination includes "the value of poetry for historical writing...[and also] the historical relationship between the two autonomous fields, i.e., poetry and history." -- Introduction.
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.
Book Synopsis Real-Time Image and Video Processing by : Nasser Kehtarnavaz
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.
Book Synopsis In the Shadow of Arabic: The Centrality of Language to Arabic Culture by : Bilal Orfali
Download or read book In the Shadow of Arabic: The Centrality of Language to Arabic Culture written by Bilal Orfali and published by BRILL. This book was released on 2011-11-11 with total page 597 pages. Available in PDF, EPUB and Kindle. Book excerpt: The collection of articles in this volume is dedicated to Ramzi Baalbaki of the American University of Beirut on the occasion of his 60th birthday. It provides an interesting glimpse into the early medieval and modern traditions related to the Arabic language, its grammar, historical development, and demonstrate its centrality to other fields of study such as qur’?nic studies, adab, folk literature, sufism, and poetry.
Book Synopsis Semiconductor Lasers I by : Eli Kapon
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
Book Synopsis Dielectric Metamaterials by : Igal Brener
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
Book Synopsis Egypt in the Era of Hosni Mubarak by : Galal Amin
Download or read book Egypt in the Era of Hosni Mubarak written by Galal Amin and published by American University in Cairo Press. This book was released on 2011-04-01 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Galal Amin once again turns his attention to the shaping of Egyptian society and the Egyptian state in the half-century and more that has elapsed since the Nasserite revolution, this time focusing on the era of President Mubarak. He looks at corruption, poverty, the plight of the middle class, and of course, the economy, and directs his penetrating gaze toward the Mubarak regime's uneasy relationship with the relatively free press it encouraged, the vexing issue of presidential succession, and Egypt's relations with the Arab world and the United States. Addressing such themes from the perspective of an active participant in Egyptian intellectual life throughout the era, Galal Amin portrays the Mubarak regime's stance in the domestic and international arenas as very much a product of history, which, while not exonerating the regime, certainly helps to explain it.
Book Synopsis The Properties of Optical Glass by : Hans Bach
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
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.
Author :Qihuang Gong Publisher :SPIE-International Society for Optical Engineering ISBN 13 :9780819483768 Total Pages :316 pages Book Rating :4.4/5 (837 download)
Book Synopsis Quantum and Nonlinear Optics by : Qihuang Gong
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
