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Author : Daniel Wright
Publisher :
Page : 460 pages
File Size : 41,95 MB
Release : 2001
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Page : 0 pages
File Size : 33,1 MB
Release : 2002
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This grant features a dual-edged effort of physical measurement (at Stanford) and synthesis (at the Kent State subcontractor) to develop new photorefractive polymers, demonstrate previously unobserved physical effects, and most importantly, to understand the mechanisms controlling the performance. This collaboration between Stanford and Kent, has successfully developed several new classes of materials which have been explored in detail using thermal, optical, electrical, and photorefractive measurements. Using our faster materials, we have demonstrated two new applications for photorefractive polymers: image amplification/novelty filtering, near-infrared response in a glassy photorefractive, and adaptive beamsplitting for detection of laser-generated ultrasound.
Author : Kwang-Sup Lee
Publisher : Springer
Page : 222 pages
File Size : 42,30 MB
Release : 2003-07-03
Category : Technology & Engineering
ISBN : 3540456422
The future of information technology requires ultra high speed processing and large data storage capacity. Since the electronics technology using semi conduc tors and inorganic materials is about to reach its limits, much current research is focused on utilizing much faster photons than electrons, namely photonics. To achieve any significant effect on the actual use of the science of photonics, devel opments of more efficient photonics materials, better optical property evaluations, manufacture of devices for system applications, etc. are the subjects which need to be explored. In particular, the development of photonics materials stands in the forefront of research as this constitutes the most pertinent factor with regard to the development of ultra high speed and large capacity information processing. In this respect, there has been continuous research on photo responsive materials through molecular structure design and architecture and the results so far are very promising as functions and performances are beginning to realize their high expectations. The two special volumes "Polymers for Photonics Applications" give authorita tive and critical reviews on up to date activities in various fields of photonic poly mers including their promising applications. Seven articles have been contributed by internationally recognized and they deal with, polymers for second and third order nonlinear optics, quadratic parametric interactions in polymer waveguides, electroluminescent polymers as light sources, photoreflective polymers for holo graphic information storage, and highly efficient two photon absorbing organics and polymers.
Author : Pierre-Alexandre Blanche
Publisher : Springer
Page : 325 pages
File Size : 48,40 MB
Release : 2016-06-10
Category : Technology & Engineering
ISBN : 3319293346
This book provides comprehensive, state-of-the art coverage of photorefractive organic compounds, a class of material with the ability to change their index of refraction upon illumination. The change is both dynamic and reversible. Dynamic because no external processing is required for the index modulation to be revealed, and reversible because the index change can be modified or suppressed by altering the illumination pattern. These properties make photorefractive materials very attractive candidates for many applications such as image restoration, correlation, beam conjugation, non-destructive testing, data storage, imaging through scattering media, holographic imaging and display. The field of photorefractive organic material is also closely related to organic photovoltaic and light emitting diode (OLED), which makes new discoveries in one field applicable to others.
Author : Kwang-Sup Lee
Publisher : Springer Science & Business Media
Page : 222 pages
File Size : 30,13 MB
Release : 2003-03-05
Category : Technology & Engineering
ISBN : 3540431578
The future of information technology requires ultra high speed processing and large data storage capacity. Since the electronics technology using semi conduc tors and inorganic materials is about to reach its limits, much current research is focused on utilizing much faster photons than electrons, namely photonics. To achieve any significant effect on the actual use of the science of photonics, devel opments of more efficient photonics materials, better optical property evaluations, manufacture of devices for system applications, etc. are the subjects which need to be explored. In particular, the development of photonics materials stands in the forefront of research as this constitutes the most pertinent factor with regard to the development of ultra high speed and large capacity information processing. In this respect, there has been continuous research on photo responsive materials through molecular structure design and architecture and the results so far are very promising as functions and performances are beginning to realize their high expectations. The two special volumes "Polymers for Photonics Applications" give authorita tive and critical reviews on up to date activities in various fields of photonic poly mers including their promising applications. Seven articles have been contributed by internationally recognized and they deal with, polymers for second and third order nonlinear optics, quadratic parametric interactions in polymer waveguides, electroluminescent polymers as light sources, photoreflective polymers for holo graphic information storage, and highly efficient two photon absorbing organics and polymers.
Author : Vaibhav Jain
Publisher : CRC Press
Page : 306 pages
File Size : 16,89 MB
Release : 2014-12-16
Category : Technology & Engineering
ISBN : 1466556900
Optical Properties of Functional Polymers and Nano Engineering Applications provides a basic introduction to the optical properties of polymers, as well as a systematic overview of the latest developments in their nano engineering applications. Covering an increasingly important class of materials relevant not only in academic research but also in industry, this comprehensive text: Considers the advantages of the liquid gradient refractive index (L-GRIN) lenses over the conventional solid lenses Explores the electrochemistry of photorefractive polymers, the molecular structure of commonly used polymers, and various 3D holographic displays Discusses gene detection using the optical properties of conjugated polymers Highlights the physics of fluorescence in photoluminescent polymers, and energy and electron transfer mechanisms Introduces conventional polymer ion sensors based on the optical sensors of conjugated polymers prepared by click chemistry reactions Explains colorimetric visual detection of ions by donor–acceptor chromophores Describes optical sensors based on fluorescent polymers and for the detection of explosives and metal ion analytes Addresses holographic polymer-dispersed liquid crystal technology, its optical setups, and its applications in organic lasers Presents cutting-edge research on electrochromic devices, along with new concepts, prototypes, commercial products, and future prospects Demonstrates new techniques for creating nanoscale morphologies through self-assembly, which affect the optical properties of the functional polymers Optical Properties of Functional Polymers and Nano Engineering Applications emphasizes the importance of nano engineering in improving the fundamental optical properties of the functional polymers, elaborating on high-level research while thoroughly explaining the underlying principles.
Author : Peter Günter
Publisher : Springer
Page : 320 pages
File Size : 18,34 MB
Release : 1988-04-08
Category : Technology & Engineering
ISBN : 9783540183327
This is the first of two volumes that review, for the first time, all major aspects of photorefractive effects and their applications. Photorefractive effects in electro-optic crystals are based on optically induced space-charge fields which ultimately alter the refractive indices by the electro-optic Pockels effect. The fundamental phenomena leading to photoinduced changes of refractive index, the materials requirements and experimental results on a variety of photorefractive materials are discussed and the most recent theoretical models describing these phenomena are presented. Interest in photorefractive materials has increased in recent years mainly because of their potential for nonlinear optical devices and for optical signals processing applications. Most of these applications are reviewed in the second volume devoted to this topic. The contributions to these two volumes are written by experts on each topic and are intended for scientists and engineers active in the field and for researchers and graduate students entering the field. Over 300 references to original papers on photorefractive and associated phenomena are cited.
Author : Dave West
Publisher : CRC Press
Page : 150 pages
File Size : 17,67 MB
Release : 2004-11-29
Category : Science
ISBN : 0203506618
Photorefractive polymer composites are an unusually sensitive class of photopolymers. Physics of Photorefraction in Polymers describes our current understanding of the physical processes that produce a photorefractive effect in key composite materials. Topics as diverse as charge generation, dispersive charge transport, charge compensation and trap
Author : J.F. Rabek
Publisher : Springer Science & Business Media
Page : 679 pages
File Size : 45,51 MB
Release : 2012-12-06
Category : Technology & Engineering
ISBN : 9401112746
During the last two decades, the production of polymers and plastics has been increasing rapidly. In spite of developing new polymers and polymeric materials, only 40~60 are used commercially on a large scale. It has been estimated that half of the annual production of polymers is employed outdoors. The photochemical instability of most polymers limits their outdoor application as they are photodegraded quickly over periods from months to a few years. To the despair of technologists and consumers alike, photodegradation and environmental ageing of polymers occur much faster than can be expected from knowledge collected in laboratories. In order to improve polymer photostability there has been a very big effort during the last 30 years to understand the mechanisms involved in photodegradation and environmental ageing. This book represents the author's attempt, based on his 25 years' experience in research on photodegradation and photo stabilization, to collect and generalize a number of available data on the photodegradation of polymers. The space limitation and the tremendous number of publications in the past two decades have made a detailed presentation of all important results and data difficult. The author apologizes to those whose work has not been quoted or widely presented in this book. Because many published results are very often contradictory, it has been difficult to present a fully critical review of collected knowledge, without antagonizing authors. For that reason, all available theories, mechanisms and different suggestions have been presented together, and only practice can evaluate which of them are valid.
Author :
Publisher :
Page : 32 pages
File Size : 32,69 MB
Release : 1995
Category :
ISBN :
The research program summarized here involved the development of new organic photorefractive polymers, improvements of our understanding of the fundamental phenomena that govern photo refractivity in these polymer systems and an optimization of the material's properties for practical device applications. Of particular emphasis were systems that might be of use as optical limiters in eye and sensor protection devices. At the time that the work supported under this Contract began, photorefractive polymers had just been discovered at IBM's Almaden Research Center. The first polymer system discovered was slow and its steady state diffraction efficiency was small. It was no match for the inorganic crystalline photorefractive materials that had been under investigation for over 20 years at that time. Substantial progress has been made and as a result of this ARPA (ARMY) supported work, photorefractive polymers are now equal in speed and efficiency to some of the best inorganic crystalline systems. Improvements continue to be made both by our group at IBM and by others and there is reason to expect that in the near future the polymeric systems will surpass the inorganic crystals in their photorefractive polymers. jg p1.