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Photocross Linked Second Order Nonlinear Optical Polymers
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Book Synopsis Photocross-Linked Second Order Nonlinear Optical Polymers by : Y. M. Chen
Download or read book Photocross-Linked Second Order Nonlinear Optical Polymers written by Y. M. Chen and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report a novel method to obtain stable second order nonlinear optical (NLO) properties in polymeric thin films. Photocross-linking between the NLO active molecules and a photoreactive polymer is achieved by ultraviolet irradiation subsequent to poling. The thin film exhibits a nonlinear coefficient d33 of 16.5 pm/V at a doping level of 20% by weight of NLO active molecules and possesses quite stable second order nonlinear optical properties.
Book Synopsis New Photocrosslinking Polymers for Second Order Nonlinear Optical Processes by :
Download or read book New Photocrosslinking Polymers for Second Order Nonlinear Optical Processes written by and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric systems have been established as useful materials for second order nonlinear optical (NLO) processes, viz. frequency doubling, linear electro-optic effect, frequency mixing and parametric oscillation. Crosslinked systems are reported to exhibit stable second order properties. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity. This approach is based on the inter- and intra- molecular photocrosslinking reactions of a photoreactive functionalized polymer. Since the second order susceptibility is directly proportional to the concentration of the nonlinear the polymer species and the temporal stability is dependent on the mobility of the nonlinear species in matrix, large and stable second order NLO properties are expected from these photocrosslinked polymers. In this communication, we report the synthesis and detailed characterization of this class of polymer.
Book Synopsis New Photocrosslinkable Polymers for Second Order Nonlinear Optical Processes by : B. K. Mandal
Download or read book New Photocrosslinkable Polymers for Second Order Nonlinear Optical Processes written by B. K. Mandal and published by . This book was released on 1991 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric systems have been established as useful materials for second order nonlinear optical (NLO) processes, viz. frequency doubling, linear electro-optic effect, frequency mixing and parametric oscillation. Crosslinked systems are reported to exhibit stable second order properties. The system can be poled and photocrosslinked in the poled state to yield a material with stable optical nonlinearity. This approach is based on the inter- and intramolecular photocrosslinking reactions of a photoreactive functionalized polymer. Since the second order susceptibility is directly proportional to the concentration of the nonlinear species and the temporal stability is dependent on the mobility of the nonlinear species in the polymer matrix, large and stable second order NLO properties are expected from these photocrosslinked polymers. In this communication, we report the synthesis and detailed characterization of this class of polymer.
Book Synopsis Stable Second-Order Optical Nonlinearity in Novel Photocrosslinkable Polymers by :
Download or read book Stable Second-Order Optical Nonlinearity in Novel Photocrosslinkable Polymers written by and published by . This book was released on 1992 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Characterization of novel photocrosslinkable second-order nonlinear optical (NLO) polymers are presented. These polymer systems have been designed with nonlinear optical moieties in the polymer main chain. When poled and sufficiently photocrosslinked, these polymers exhibit relatively stable second-order nonlinearity at room temperature. The linear optical and second order NLO properties of these recently synthesized polymers have been investigated. Second harmonic generation (SHG) was utilized to monitor the temporal stability of the nonlinearity. The linear electro-optic coefficients were measured with a modified Michelson interferometer.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Polymers for Second-order Nonlinear Optics by : Geoffrey A. Lindsay
Download or read book Polymers for Second-order Nonlinear Optics written by Geoffrey A. Lindsay and published by . This book was released on 1995 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Optical and Electro-Optical Properties of a Photocross-Linkable Polymer by :
Download or read book Optical and Electro-Optical Properties of a Photocross-Linkable Polymer written by and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Planar waveguides from a photocross-linkable polymer have been fabricated on glass and SiO2 on silicon using the spin coating process. The polymer has been cross-linked by exposure to UV radiation (lambda = 254 nm). Prism coupling technique has been used to couple a laser beam into the waveguide structure. The waveguiding parameters such as number of modes, loss, thickness and index of refraction of the polymer have been determined before and after cross-linking. The refractive index of the polymer before cross-linking differs significantly from that after cross-linking. No anisotropy has been observed in the refractive indices for the uncross-linked or cross-linked samples. The refractive index and thickness of the polymer film before and after cross- linking have also been measured using an ellipsometer and found to be in very good agreement with those obtained by the prism coupling technique. Dye molecules with large second order hyperpolarizability were utilized as guests into the photocross-linkable polymer matrix for second order nonlinear optical applications. Electro-optic properties of this polymeric system are reported.
Book Synopsis Polymers in Telecommunication Devices by : G. H. Cross
Download or read book Polymers in Telecommunication Devices written by G. H. Cross and published by iSmithers Rapra Publishing. This book was released on 2002 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Polymers for Photonics Applications II by : Kwang-Sup Lee
Download or read book Polymers for Photonics Applications II written by Kwang-Sup Lee and published by Springer Science & Business Media. This book was released on 2003-03-05 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Optical and Electrical Properties of Polymers: Volume 214 by : John A. Emerson
Download or read book Optical and Electrical Properties of Polymers: Volume 214 written by John A. Emerson and published by Mrs Proceedings. This book was released on 1991-10-18 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MRS Symposium Proceeding series is an internationally recognised reference suitable for researchers and practitioners.
Book Synopsis Photoalignment of Liquid Crystalline Materials by : Vladimir G. Chigrinov
Download or read book Photoalignment of Liquid Crystalline Materials written by Vladimir G. Chigrinov and published by John Wiley & Sons. This book was released on 2008-09-15 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photoalignment possesses significant advantages in comparison with the usual ‘rubbing’ treatment of the substrates of liquid crystal display (LCD) cells as it is a non-contact method with a high resolution. A new technique recently pioneered by the authors of this book, namely the photo-induced diffusion reorientation of azodyes, does not involve any photochemical or structural transformations of the molecules. This results in photoaligning films which are robust and possess good aligning properties making them particularly suitable for the new generation of liquid crystal devices. Photoalignment of Liquid Crystalline Materials covers state-of-the-art techniques and key applications, as well as the authors’ own diffusion model for photoalignment. The book aims to stimulate new research and development in the field of liquid crystalline photoalignment and in so doing, enable the technology to be used in large scale LCD production. Key features: Provides a full examination of the mechanisms of photoalignment. Examines the properties of liquid crystals during photoalignment, with particular reference made to the effect on their chemical structure and stability. Considers the most useful photosensitive materials and preparation procedures suitable for liquid crystalline photoalignment. Presents several methods for photoalignment of liquid crystals. Compares various applications of photoalignment technology for in-cell patterned polarizers and phase retarders, transflective and micro displays, security and other liquid crystal devices. Through its interdisciplinary approach, this book is aimed at a wide range of practising electrical engineers, optical engineers, display technologists, materials scientists, physicists and chemists working on the development of liquid crystal devices. It will also appeal to researchers and graduate students taking courses on liquid crystals or display technologies. The Society for Information Display (SID) is an international society, which has the aim of encouraging the development of all aspects of the field of information display. Complementary to the aims of the society, the Wiley-SID series is intended to explain the latest developments in information display technology at a professional level. The broad scope of the series addresses all facets of information displays from technical aspects through systems and prototypes to standards and ergonomics
Book Synopsis The Handbook of Photonics by : Mool C. Gupta
Download or read book The Handbook of Photonics written by Mool C. Gupta and published by CRC Press. This book was released on 2018-10-03 with total page 1040 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reflecting changes in the field in the ten years since the publication of the first edition, The Handbook of Photonics, Second Edition explores recent advances that have affected this technology. In this new, updated second edition editor Mool Gupta is joined by John Ballato, strengthening the handbook with their combined knowledge and the continued contributions of world-class researchers. New in the Second Edition: Information on optical fiber technology and the economic impact of photonics Coverage of emerging technologies in nanotechnology Sections on optical amplifiers, and polymeric optical materials The book covers photonics materials, devices, and systems, respectively. An introductory chapter, new to this edition, provides an overview of photonics technology, innovation, and economic development. Resting firmly on the foundation set by the first edition, this new edition continues to serve as a source for introductory material and a collection of published data for research and training in this field, making it the reference of first resort.
Book Synopsis Official Gazette of the United States Patent and Trademark Office by :
Download or read book Official Gazette of the United States Patent and Trademark Office written by and published by . This book was released on 1996 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Index of Patents Issued from the United States Patent and Trademark Office by :
Download or read book Index of Patents Issued from the United States Patent and Trademark Office written by and published by . This book was released on 1993 with total page 1736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Optics of Organic Molecules and Polymers by : Hari Singh Nalwa
Download or read book Nonlinear Optics of Organic Molecules and Polymers written by Hari Singh Nalwa and published by CRC Press. This book was released on 2020-07-09 with total page 896 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of nonlinear optics emerged three decades ago with the development of the first operating laser and the demonstration of frequency doubling phenomena. These milestone discoveries not only generated much interest in laser science, but also set the stage for future work on nonlinear optics. This book presents an excellent overview of the exciting new advances in nonlinear optical (NLO) materials and their applications in emerging photonics technologies. It is the first reference source available to cover every NLO material published through 1995. All theoretical approaches, measurement techniques, materials, technologies, and applications are covered. With more than 1,800 bibliographic citations, 324 figures, 218 tables, and 812 equations, this book is an invaluable reference source for graduate and undergraduate students, researchers, scientists and engineers working in academia and industries in chemistry, solid-state physics, materials science, optical and polymer engineering, and computational science.
Book Synopsis Design and Synthesis of a New Class of Photocrosslinkable Nonlinear Optical Polymers by : S. K. Tripathy
Download or read book Design and Synthesis of a New Class of Photocrosslinkable Nonlinear Optical Polymers written by S. K. Tripathy and published by . This book was released on 1991 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: We have developed a new class of photocrosslinkable polymers with stable second and third order nonlinear optical (NLO) properties. The polymers have significant processing advantages over their inorganic counterparts. The NLO polymers have been designed as guest-host systems and as polymers with the NLO and photocrosslinkable units in the main chain and in the side chain. Cinnamoyl groups have been selected as photocrosslinking groups. Donor-acceptor substituted conjugated dyes functionalized with photocrosslinking units have been used as the NLO component. The stability of the poled and crosslinked polymers has been investigated by monitoring the decay of the second harmonic signal. No measurable decay in optical nonlinearity is observed for one of the photocrosslinked polymers up to temperatures of 160 C for a period of several hours. These results are also confirmed by monitoring the stability of the UV-visible absorption spectrum at these temperatures. Channel waveguides and diffraction gratings have been fabricated using lithographic techniques.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
