Download or read book Nanostructuration par laser femtoseconde dans un verre photo luminescent written by Matthieu Bellec and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'objet de cette thèse est l'étude de l'interaction d'un laser femtoseconde avec un support photosensible particulier: un verre phosphate dopé à l'argent appelé verre photo-luminescent (PL). Une nouvelle approche permettant de réaliser en trois dimensions dans un verre PL des nanostructures d'argent aux dimensions bien inférieures à la limite de diffraction est tout d'abord présentée. La mesure des propriétés optiques et structurales pour différentes échelles (spatiales et temporelles) a permis de proposer un mécanisme de formation des structures photo-induites qui est basé sur un jeu subtil entre les phénomènes d'absorption non-linéaire et de thermo-diffusion. La deuxième partie de cette thèse sera orientée sur les propriétés optiques (linéaires et non-linéaires) et les applications des ces nanostructures d'argent. En particulier, l'exaltation des propriétés non-linéaires des agrégats d'argent sera exploitée pour stocker optiquement de l'information en trois dimentions.

Download or read book Ultrafast Laser Nanostructuring written by Razvan Stoian and published by Springer Nature. This book was released on 2023-04-06 with total page 1243 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together contributions from leading experts in the field, this book reviews laser processing concepts that allow the structuring of material beyond optical limits, and methods that facilitate direct observation of the underlying mechanisms by exploring direct structuring and self-organization phenomena. The capacity to nanostructure material using ultrafast lasers lays the groundwork for the next generation of flexible and precise material processing tools. Rapid access to scales of 100 nm and below in two and three dimensions becomes a factor of paramount importance to engineer materials and to design innovative functions. To reflect the dynamic nature of the field at all levels from basic science to applications, the book is divided into three parts, Fundamental Processes, Concepts of Extreme Nanostructuring, and Applications, each of which is comprehensively covered. This book will be a useful resource for graduate students and researchers in laser processing, materials engineering, and nanoscience.

Download or read book Nanostructuration des propri t s optiques lin aires et non lin aires d un verre photosensible par laser femtoseconde written by Gautier Papon and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le cadre de cette thèse un verre phosphate de zinc dopé avec des cations d'argent a été irradié par laser femtoseconde. Cette irradiation induit l'apparition dans le voxel de focalisation, d'une émission de fluorescence et une génération de second harmonique au sein du verre. La fluorescence a été attribuée à la création d'agrégats fluorescents composé d'une dizaine d'atomes d'argent. Une étude spectrale a été réalisée permettant de distinguer les différents types d'agrégats générés. Par ailleurs, la génération de seconde harmonique est attribuée à la présence d'un champs électrique enterré dans la zone irradié par effet EFISH (electric field induced second harmonic). La direction et la répartition de ce champ électrique, ont été étudié optiquement et conduisent à sa représentation spatiale.Les effets des paramètres expérimentaux, tels que le nombre d'impulsions laser, l'énergie par impulsion, la température du verre et le recuit sur les caractéristiques de la GSH et de la fluorescence, ont été étudiés. Enfin un processus global est proposé, expliquant les différentes étapes de la structuration, de la création du champ enterré par migration d'électrons à la réduction des cations d'argent et la croissance des agrégats.

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.

Download or read book Confocal Microscopy and Multiphoton Excitation Microscopy written by Barry R. Masters and published by SPIE Press. This book was released on 2006 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text guides you through the principles and practical techniques of confocal and multiphoton microscopy. It also describes the historical connections and parallel inventions that resulted in modern techniques of live cell imaging and their use in biology and medicine. You will find comparisons of different types of confocal and multiphoton microscopes, solutions to the problems one would encounter when using various microscopic techniques, tips on selecting equipment, and an extensive annotated bibliography of additional resources.

Download or read book Quantitative Phase Imaging written by Gabriel Popescu and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 'Proceedings of SPIE' presents the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields.

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.

Download or read book 2016 IEEE International Electron Devices Meeting IEDM written by IEEE Staff and published by . This book was released on 2016-12-03 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: the IEEE IEDM has been the world s main forum for reporting breakthroughs in technology, design, manufacturing, physics and the modeling of semiconductors and other electronic devices Topics range from deep submicron CMOS transistors and memories to novel displays and imagers, from compound semiconductor materials to nanotechnology devices and architectures, from micromachined devices to smart power technologies, etc

Download or read book Super Resolution Microscopy Techniques in the Neurosciences written by Eugenio F. Fornasiero and published by Humana. This book was released on 2016-08-27 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Super-Resolution Microscopy Techniques in the Neurosciences serves as a comprehensive description of current super-resolution techniques, including the physical principles that allowed for their development, some of the most recent neurobiological applications and selected information for the practical use of these technologies. Written for the Neuromethods series, this detailed work contains contributions from experts in the field and provides key implementation advice to ensure successful results in the lab. Authoritative and cutting-edge, Super-Resolution Microscopy Techniques in the Neurosciences is an ideal guide for researchers aiming to continue increasing the resolution in the imaging capabilities of neuroscientists and thereby changing the perspective in which cellular biology processes are understood at the nanometer scale.