Download or read book tude en champ proche optique de guides optiques de luminescence et d effets photor fractifs dans des cristaux written by Sorin Tascu and published by . This book was released on 2003 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce manuscrit porte sur l'étude de phénomènes photoréfractifs et de luminescence dans des guides d'ondes optiques plans et canaux, en utilisant la technique SNOM. Des structures guidantes créées dans du LiNbO/3, LiTaO/3, SBN et LiF par plusieurs méthodes, ont été caractérisées par l'acquisition simultanée d'une image topographique et d'une image optique de champ proche. Pour la première fois des effets électro-optiques sous champ électrique externe permettant la création de solitons spatiaux photoréfractifs a été étudiée dans des guides monocristallins de SBN, dans une configuration SNOM. Nous présentons également les premiers guides canaux obtenus par implantation ionique dans le SBN, ainsi que les études d'effets photoréfractifs sous champ dans ces guides. Par ailleurs, une étude spectroscopique locale a été réalisée sur des structures de centres colorés dans du LiF et le guidage optique dans des structures en ruban de centres colorés a été également examiné en configuration SNOM

Download or read book Etude en champ proche optique de guides cristaux photoniques sur SOI written by Delphine Neel and published by . This book was released on 2006 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail de thèse porte sur l'étude par microscopie en champ proche optique (SNOM) de composants à cristaux photoniques bidimensionnels sur SOI, dans le domaine du proche infrarouge (longueurs d'onde télécom 1,2-1,6 micromètre). Le SNOM fournit une cartographie locale du champ électromagnétique dans les composants, avec une résolution de l'ordre de 150 nm. Les cartes de champs ainsi obtenues permettent une compréhension approfondie des phénomènes physiques qui ont lieu au sein de ces structures complexes. Trois fonctionnalités optiques différentes ont été abordées. Tout d'abord, le guidage de lumière a été mis en évidence dans un défaut linéaire de type W1. La présence d'ondes de Bloch et d'ondes stationnaires a été observée dans ce guide. Ensuite, concernant le couplage, nous avons étudié différents types de transitions (tapers) permettant d'améliorer le couplage entre guides diélectriques et guides à cristaux photoniques, ainsi qu'entre guides à cristaux photoniques et guides à cavités couplées. Nous montrons que l'utilisation de tapers correctement optimisés améliore le coefficient de transmission des structures, en réduisant les pertes hors du plan. Nous avons également calculé les pertes par propagation dans les cavités couplées. Enfin, un démultiplexeur en longueur d'onde a été conçu et caractérisé. Ce démultiplexeur utilise le principe du coupleur directionnel. Un effet de démultiplexage a été observé entre 1.3 et 1.5 micromètre.

Download or read book Photorefractive Crystals in Coherent Optical Systems written by Mikhail P. Petrov and published by Springer. This book was released on 2013-11-11 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the processes of optical information recording in photorefractive crystals and applications of these materials in phase-conjugating devices, holographic interferometry, optical computers and sensors. It is in essence an extensive introduction to this new and rapidly developing area of quantum electronics. It presents physical concepts, fundamentals of theory, and important experimental data. A rigorous treatment of basic phenomena is accompanied by a quantitative analysis, which makes the book interesting to experts and accessible for newcomers to the field. Of particular interest to researchers is an extensive summary of basic physical and holographic parameters of all presently known photorefractive crystals and structures and also a detailed critical analysis of their applications.

Download or read book The Optical Indicatrix and the Transmission of Light in Crystals written by Fletcher and published by . This book was released on 1892 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optique mol culaire written by François Moigno and published by . This book was released on 1873 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optique moleculaire written by abbé Moigno (François Napoléon Marie) and published by . This book was released on 1873 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Champ cristallin et luminescence written by Daniel Curie and published by FeniXX. This book was released on 1968-01-01T00:00:00+01:00 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage est une réédition numérique d’un livre paru au XXe siècle, désormais indisponible dans son format d’origine.

Download or read book Crystal Optics with Spatial Dispersion and Excitons written by Vladimir M. Agranovich and published by Springer. This book was released on 1984-05-01 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Spatial dispersion, namely, the dependence of the dielectric-constant tensor on the wave vector (i.e., on the wavelength) at a fixed frequency, is receiving increased attention in electrodynamics and condensed-matter optics, partic ularly in crystal optics. In contrast to frequency dispersion, namely, the frequency dependence of the dielectric constant, spatial dispersion is of interest in optics mainly when it leads to qualitatively new phenomena. One such phenomenon has been weH known for many years; it is the natural optical activity (gyrotropy). But there are other interesting effects due to spatial dispersion, namely, new normal waves near absorption lines, optical anisotropy of cubic crystals, and many others. Crystal optics that takes spatial dispersion into account includes classical crystal optics with frequency dispersion only, as a special case. In our opinion, this fact alone justifies efforts to develop crystal optics with spatial dispersion taken into account, although admittedly its influence is smaH in some cases and it is observable only under rather special conditions. Furthermore, spatial dispersion in crystal optics deserves attention from another point as well, namely, the investigation of excitons that can be excited by light. We contend that crystal optics with spatial dispersion and the theory of excitons are fields that overlap to a great extent, and that it is sometimes quite impossible to separate them. It is our aim to show the true interplay be tween these interrelations and to combine the macroscopic and microscopic approaches to crystal optics with spatial dispersion and exciton theory.

Download or read book Optical Properties of Photonic Crystals written by Kazuaki Sakoda and published by Springer Verlag. This book was released on 2001 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first comprehensive textbook on the optical properties of photonic crystals. It deals not only with the properties of the radiation modes inside the crystals but also with their peculiar optical response to external fields. A general theory of linear and nonlinear optical response is developed in a clear and detailed fashion using the Green's function method. The symmetry of the eigenmodes is treated systematically using group theory to show how it affects the optical properties of photonic crystals. Important recent developments such as the enhancement of stimulated emission, second harmonic generation, quadrature-phase squeezing, and low-threshold lasing are also treated in detail and made understandable. Numerical methods are also emphasized. Thus this book provides both an introduction for graduate and undergraduate students and also key information for researchers in this field. This second edition has been updated and includes a new chapter on superfluorescence. Book jacket.

Download or read book R pertoire d optique moderne written by abbé François-Napoléon-Marie Moigno and published by . This book was released on 1850 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R pertoire d optique moderne ou analyse compl te des travaux modernes relatifs aux ph nom nes de la lumi re written by François Napoléon Marie Moigno and published by . This book was released on 1850 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optique cristalline polarisation rotatoire tats m somorphes written by Henri Bouasse and published by . This book was released on 1925 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction la haute optique tr par C Forthomme written by August Beer and published by . This book was released on 1858 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Le microscope polarisant written by Friedrich Rinne and published by . This book was released on 1904 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Polarisation et optique cristalline written by Henri Pellat and published by . This book was released on 1896 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R pertoire d optique moderne ou Analyse compl te des travaux modernes relatifs aux phenomenes de la lumiere par l abbe Moigno written by and published by . This book was released on 1850 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Explication des ph nom nes optiques anomaux que pr sentent un grqnd nombre de substances cristallis es written by Ernest Mallard (i. d., François Ernest) and published by . This book was released on 1877 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: