Contribution a l'etude et a l'optimisation de composants optoelectroniques PDF Download

Author: Vincent Magnin
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

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Author: Vincent Magnin
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Book Description
Dans cette these, nous presentons des outils de modelisation destines a l'etude des composants optoelectroniques et des methodes d'optimisation permettant d'en tirer encore plus de profit. Afin de modeliser differents composants optoelectroniques sur inp, nous avons mis au point un logiciel fonde sur la methode des faisceaux propages (bpm) afin d'etudier la propagation et l'absorption de la lumiere, et un modele hydrodynamique afin de modeliser leur comportement electronique. Nous avons realise une recherche bibliographique pour regrouper les donnees materiaux necessaires. Le premier composant que nous avons etudie et optimise est un phototransistor a heterojonction inp/ingaas pour les applications hyperfrequences. Nous avons expose son fonctionnement et montre ses possibilites et limites. Sa structure optique de type guide d'onde peut etre amelioree par l'ajout d'une couche de quaternaire. On peut envisager la realisation de phototransistors a double heterojonction pour les applications de puissance. Nous avons ensuite etudie des photodiodes pin-guide a tres fort coefficient de couplage et grande tolerance d'alignement. Differentes solutions ont ete envisagees. Nous avons montre l'interet des structures lentillees, comportant plusieurs couches de confinement d'indices optiques progressifs, et etudie leurs performances optiques et electriques. Pour optimiser ces structures, nous avons mis au point un algorithme monte carlo couple a une bpm-2d, qui permet de tester des milliers de structures aleatoires. Enfin, nous avons realise un algorithme genetique couple a une bpm-2d et avons montre son interet pour l'optimisation de composants optoelectroniques avec de nombreux parametres et des objectifs multiples. Ce type d'algorithme est fonde sur la theorie de l'evolution de darwin. Nous l'avons applique a l'optimisation de commutateurs optique a reflexion interne totale et de commutateurs cascade.

Author: Joachim Piprek
Publisher: Elsevier
ISBN: 0080469787
Category : Technology & Engineering
Languages : en
Pages : 296

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Book Description
Optoelectronics has become an important part of our lives. Wherever light is used to transmit information, tiny semiconductor devices are needed to transfer electrical current into optical signals and vice versa. Examples include light emitting diodes in radios and other appliances, photodetectors in elevator doors and digital cameras, and laser diodes that transmit phone calls through glass fibers. Such optoelectronic devices take advantage of sophisticated interactions between electrons and light. Nanometer scale semiconductor structures are often at the heart of modern optoelectronic devices. Their shrinking size and increasing complexity make computer simulation an important tool to design better devices that meet ever rising perfomance requirements. The current need to apply advanced design software in optoelectronics follows the trend observed in the 1980's with simulation software for silicon devices. Today, software for technology computer-aided design (TCAD) and electronic design automation (EDA) represents a fundamental part of the silicon industry. In optoelectronics, advanced commercial device software has emerged recently and it is expected to play an increasingly important role in the near future. This book will enable students, device engineers, and researchers to more effectively use advanced design software in optoelectronics. - Provides fundamental knowledge in semiconductor physics and in electromagnetics, while helping to understand and use advanced device simulation software - Demonstrates the combination of measurements and simulations in order to obtain realistic results and provides data on all required material parameters - Gives deep insight into the physics of state-of-the-art devices and helps to design and analyze of modern optoelectronic devices

Author: Joseph M. Marshall
Publisher: Springer Science & Business Media
ISBN: 9401006326
Category : Technology & Engineering
Languages : en
Pages : 361

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The primary objective of this NATO Advanced Study Institute (ASI) was to present an up-to-date overview of various current areas of interest in the field of photovoltaic and related photoactive materials. This is a wide-ranging subject area, of significant commercial and environmental interest, and involves major contributions from the disciplines of physics, chemistry, materials, electrical and instrumentation engineering, commercial realisation etc. Therefore, we sought to adopt an inter disciplinary approach, bringing together recognised experts in the various fields while retaining a level of treatment accessible to those active in specific individual areas of research and development. The lecture programme commenced with overviews of the present relevance and historical development of the subject area, plus an introduction to various underlying physical principles of importance to the materials and devices to be addressed in later lectures. Building upon this, the ASI then progressed to more detailed aspects of the subject area. We were also fortunately able to obtain a contribution from Thierry Langlois d'Estaintot of the European Commission Directorate, describing present and future EC support for activities in this field. In addition, poster sessions were held throughout the meeting, to allow participants to present and discuss their current activities. These were supported by what proved to be very effective feedback sessions (special thanks to Martin Stutzmann), prior to which groups of participants enthusiastically met (often in the bar) to identify and agree topics of common interest.

Author: Marin Alexe
Publisher: Springer Science & Business Media
ISBN: 9783540210498
Category : Science
Languages : en
Pages : 524

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During the past decade direct wafer bonding has developed into a mature materials integration technology. This book presents state-of-the-art reviews of the most important applications of wafer bonding written by experts from industry and academia. The topics include bonding-based fabrication methods of silicon-on-insulator, photonic crystals, VCSELs, SiGe-based FETs, MEMS together with hybrid integration and laser lift-off. The non-specialist will learn about the basics of wafer bonding and its various application areas, while the researcher in the field will find up-to-date information about this fast-moving area, including relevant patent information.

Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659

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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:
Publisher:
ISBN:
Category : Telecommunication
Languages : en
Pages : 752

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Author: Jim Richards
Publisher: Elsevier Health Sciences
ISBN: 0702051993
Category : Medical
Languages : en
Pages : 190

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Whittle’s Gait Analysis – formerly known as Gait Analysis: an introduction – is now in its fifth edition with a new team of authors led by David Levine and Jim Richards. Working closely with Michael Whittle, the team maintains a clear and accessible approach to basic gait analysis. It will assist both students and clinicians in the diagnosis of and treatment plans for patients suffering from medical conditions that affect the way they walk. Highly readable, the book builds upon the basics of anatomy, physiology and biomechanics Describes both normal and pathological gait Covers the range of methods available to perform gait analysis, from the very simple to the very complex. Emphasizes the clinical applications of gait analysis Chapters on gait assessment of neurological diseases and musculoskeletal conditions and prosthetics and orthotics Methods of gait analysis Design features including key points A team of specialist contributors led by two internationally-renowned expert editors 60 illustrations, taking the total number to over 180 Evolve Resources containing video clips and animated skeletons of normal gait supported by MCQs, an image bank, online glossary and sources of further information. Log on to http://evolve.elsevier.com/Whittle/gait to register and start using these resources today!

Author:
Publisher: Academic Press
ISBN: 0080864457
Category : Technology & Engineering
Languages : ru
Pages : 489

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Volume 48in the Semiconductors and Semimetals series discusses the physics and chemistry of electronic materials, a subject of growing practical importance in the semiconductor devices industry. The contributors discuss the current state of knowledge and provide insight into future developments of this important field.

Author: John Wilfred Orton
Publisher:
ISBN: 0199695822
Category : Science
Languages : en
Pages : 529

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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.