[PDF] Nonlinear Optical Polymers Waveguide Devices Based On Second Order Effects eBook

Author : Winfred H. G. Horsthuis
Publisher :
Page : 4 pages
File Size : 12,33 MB
Release : 1992
Category :
ISBN :

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In the past few years, organic materials have gained much interest for application in nonlinear optical devices. The initial sepsis towards these new materials has decreased, since interesting results have been obtained using these materials. The advantages of such materials, expected by early workers in the field, have partially been proven. High electro-optic coefficients have been reported, and reasonably well performing integrated optic devices have been realized. Some other items, such as long term stability, mode matching and low cost production, still need further investigations and development. Nonlinear optic organic materials can be divided in several classes: organic (single) crystals, Langmuir-Blodgett films and several polymeric systems (solid-solutions, main-chain polymers, sidechain polymers). Until now, side-chain polymers appear to be the most promising class, mainly because of their attractive processing characteristics and the flexibility in molecular design.

Author : A.D. Boardman
Publisher : Springer Science & Business Media
Page : 491 pages
File Size : 43,80 MB
Release : 2012-12-06
Category : Science
ISBN : 9400708505

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Although it took some time to establish the word, photonics is both widely accepted and used throughout the world and a major area of activity concerns nonlinear materials. In these the nonlinearity mainly arises from second-order or third-order nonlinear optical processes. A restriction is that second-order processes only occur in media that do not possess a centre of symmetry. Optical fibres, on the other hand, being made of silica glass, created by fusing SiO molecules, are made of material with a centre of z symmetry, so the bulk of all processes are governed by third-order nonlinearity. Indeed, optical fibre nonlinearities have been extensively studied for the last thirty years and can be truly hailed as a success story of nonlinear optics. In fact, the fabrication ofsuch fibres, and the exploitation oftheir nonlinearity, is in an advanced stage - not least being their capacity to sustain envelope solitons. What then ofsecond-order nonlinearity? This is also well-known for its connection to second-harmonic generation. It is an immediate concern, however, to understand how waves can mix and conserve both energy and momentum ofthe photons involved. The problem is that the wave vectors cannot be made to match without a great deal of effort, or at least some clever arrangement has to be made - a special geometry, or crystal arrangement. The whole business is called phase matching and an inspection ofthe state-of-the-art today, reveals the subject to be in an advanced state.

Author : J. Messier
Publisher : Springer Science & Business Media
Page : 393 pages
File Size : 48,26 MB
Release : 2012-12-06
Category : Science
ISBN : 9400922957

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Photonics, the counterpart of electronics, involves the usage of Photons instead of electrons to process information and perform various switching operations. Photonics is projected to be the technology of the future because of the gain in speed, processing and interconnectivity of network. Nonlinear optical processes will play the key role in photonics Where they can be used for frequency conversion, optical switching and modulation. Organic molecules and polymers have emerged as a new class of highly promising nonlinear optical materials Which has captured the attention of scientists world wide. The organic systems offer the advantage of large nonresonant nonlinearities derived from the 1T electrons contribution, femtosecond response time and the flexibility to modify their molecular structures. In addition, organic polymers can easily be fabricated in various device structures compatible with the fiber-optics communication system. The area of nonlinear optics of organic molecules and polymers offers exciting opportunities for both fundamental research and technologic development. It is truly an interdisciplinary area. This proceeding is the outcome of the first NATO Advanced Research WOrkshop in this highly important area. The objective of the workshop was to provide a forum for scientists of varying background from both universities and industries to come together and interface their expertize. The scope of the workshop was multidisciplinary with active participations from Chemists, physicists, engineers and materials scientists from many countries.

Author : G. H. Cross
Publisher : iSmithers Rapra Publishing
Page : 162 pages
File Size : 41,59 MB
Release : 2002
Category : Language Arts & Disciplines
ISBN : 9781859573617

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This report discusses the use of the use of polymers instead of and in conjunction with, traditional platforms such as indium phosphide and ferroelectric ceramic lithium niobate. Critical comparisons are made between use of polymers and alternative. This review report gives an overview of all the elements of optical transmission and switching systems that are used in telecommunications and is a fully interdisciplinary account of materials and device design issues. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database gives useful references for further reading.

Author : Geoffrey A. Lindsay
Publisher :
Page : 564 pages
File Size : 24,22 MB
Release : 1995
Category : Language Arts & Disciplines
ISBN :

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Presents the most recent developments in second-order nonlinear optical polymers. Covers the most important technologies necessary to achieve commercially viable devices based on special polymeric materials with second-order nonlinear optical properties. Discusses important molecular design considerations, how to process the polymers into films, the stability of the films, their optical properties, and prototype devices that can be made from these films.

Author : Paras N. Prasad
Publisher : Springer Science & Business Media
Page : 445 pages
File Size : 39,85 MB
Release : 2012-12-06
Category : Science
ISBN : 1461309530

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This treatise is a compendium of papers based on invited talks presented at the American Chemical Society Symposium on Electroactive Polymers which covered nonlinear optical polymers and conducting polymers, the common denominator being the correlated pi-electron structures. The improved understanding of the consequences of pi-electron delocalization upon nonlinear optical properties and charge carrier dynamics has laid the foundation for the rapid development and application of the electroresponse of conjugated polymers. As a result, the area of electroactive and nonlinear optical polymers is emerging as a frontier of sCience and technology. It is a multidisciplinary field that is bringing together scientists and engineers of varied background to interface their expertise. The recent explosion of interest in this area stems from the prospect of utilizing nonlinear optical effects for optical switching and logic operations in optical computing, optical signal processing, optical sensing and optical fiber communications. Polymers and organic are rapidly becoming one of the major material classes for nonlinear optical applications along with multiple quantum wells, ferroelectrics and other oxides, and direct band-gap semiconductors. The reasons for this lie in the unique molecular structures of polymers and organics and the ability to molecularly engineer the architecture of these structures through chemical synthesis.

Author : Paras N. Prasad
Publisher : Wiley-Interscience
Page : 328 pages
File Size : 46,7 MB
Release : 1991-01-16
Category : Science
ISBN :

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Molecular Dynamics in Restricted Geometries Edited by Joseph Klafter and J. M. Drake This investigation of the chemistry and physics of complex systems focuses on the role of spatial restrictions on molecular movement. A practical source-book for researchers in chemical physics, chemical engineering, and condensed matter physics, and for graduate students in these fields, it covers a broad range of topics and critically evaluates methods as they are employed. Among the many topics it covers are: relaxation and diffusion in restricted geometries, excitation energy transfer and photoinduced electron transfer phenomena in some confined systems, electron excitation transport in micelles, polymers and multilayers, and electron excitation transport on polymer chains. 1989 (0 471-60176-4) 437 pp.

Author : Seizo Miyata
Publisher : CRC Press
Page : 264 pages
File Size : 20,41 MB
Release : 2000-12-21
Category : Science
ISBN : 9789056992705

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This monograph contains all major achievements and future insights in the field of optical communication systems. It covers the molecular design and synthesis of new organic compounds, processing, processing of materials and their characterization due to novel techniques, device fabrications and assessment of optical devices in display and information processing.

Author : Seizo Miyata
Publisher : CRC Press
Page : 290 pages
File Size : 46,8 MB
Release : 2020-12-17
Category : Science
ISBN : 1000124681

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Poled polymers doped with nonlinear optically active chromophores combine the large second order nonlinearity of the dopant dye molecules with the optical quality of the polymer. The material design flexibility afforded to doped polymers makes them attractive in a large variety of devices and applications. This book addresses the critical science and technology issues in the development and application of poled polymers, with an emphasis on the stabilization of poled polymers and their special applications to second harmonic generation (SHG) and electro-optic (EO) devices.

Author : V. Degiorgio
Publisher : IOS Press
Page : 518 pages
File Size : 21,30 MB
Release : 1995
Category : Science
ISBN : 9789051992045

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Nonlinear optical materials play a pivotal role in the future evolution of nonlinear optics in general and its impact in technology and industrial applications in particular. The progress in nonlinear optics has been tremendous since the first demonstration of an all-optical nonlinear effect in the early sixties, but until recently the main visible emphasis was on the physical aspects of the nonlinear radiation matter interaction. In the last decade, however, this effort has also brought its fruits in applied aspects of nonlinear optics. This can be essentially traced to the improvement of the performances of the nonlinear optical materials. Our understanding of the nonlinear polarization mechanisms and their relation to the structural characteristics of the materials has been considerably improved. In addition, the new development of techniques for the fabrication and growth of artificial materials has dramatically contributed to this evolution. The goal is to find and develop materials presenting large nonlinearities and satisfying at the same time all the technological requirements for applications such as wide transparency range, fast response, high damage threshold but also processability, adaptability and interfacing with other materials. Improvements, besides rendering possible the implementation of nonlinear effects in devices, open the way to the study of new nonlinear optical effects and the introduction of new concepts. This book describes new concepts which are emerging in the field of nonlinear optical materials, concentrating the attention on materials which seem more promising for applications in the technology of information transmission and processing.