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Modelisation Numerique Et Imagerie Optique En Champ Proche Par Retro Injection Laser De Guides Donde Plasmoniques
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Book Synopsis Modélisation numérique et imagerie optique en champ proche par rétro-injection laser de guides d’onde plasmoniques by : Matthieu Roblin
Download or read book Modélisation numérique et imagerie optique en champ proche par rétro-injection laser de guides d’onde plasmoniques written by Matthieu Roblin and published by . This book was released on 2013 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est consacrée à l’étude théorique et expérimentale de guides d’onde plasmoniques fonctionnant à la longueur d’onde de 1,55μm. Ces guides d’onde plasmoniques sont envisagés comme interconnexions optiques avec un confinement latéral sub-longueur d’onde. Différents codes de simulations ont été développés à la fois comme outils de prédiction pour la conception des composants mais également pour comparer systématiquement les résultats du calcul avec les mesures expérimentales. Un premier modèle 2D basé sur une approche multicouche a été utilisé pour identifier les modes plasmoniques sur des structures planaires. Un solveur de mode a ensuite permis de déterminer les modes propres dans des guides d’onde plasmoniques de formes diverses. Finalement, ces deux codes ont été utilisés pour implémenter une source optique dans un code FDTD (Finite-Difference Time-Domain) utilisé pour simuler numériquement, par éléments finis, des structures plasmoniques en 2D ou 3D. Deux catégories de guides d’onde plasmoniques ont été fabriquées par lithographie par faisceaux d’électrons. Un montage de microscopie en champ proche SNOM fonctionnant par étro-injection laser a été pour caractériser expérimentalement les propriétés optiques de ces structures. La première catégorie est constituée de bandes métalliques en or caractérisées par une longueur de propagation élevée mais un confinement latéral limité. La seconde catégorie est constituée par des rubans en polymère déposés sur une couche d'or. Ces guides, dits DLSPP, présentent un confinement optique sub-longueur d’onde qui permet de combler l’écart d’échelle entre des composants optiques et des circuits intégrés électroniques.
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 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 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.
