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Isothermal Annealing And Relaxation Of The Second Harmonic Generation Signal From A Nonlinear Optical Polymer
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Book Synopsis Isothermal Annealing and Relaxation of the Second Harmonic Generation Signal from a Nonlinear Optical Polymer by :
Download or read book Isothermal Annealing and Relaxation of the Second Harmonic Generation Signal from a Nonlinear Optical Polymer written by and published by . This book was released on 1993 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of the first detailed study of the effect of isothermal annealing on the relaxation behavior of the second harmonic generation signal below Tg of nonlinear optical (NLO) polymers are presented. Lengthening of the NLO chromophore relaxation time by isothermal poling suggests a strategy for preparing a stable NLO material.
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 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Relaxation of Polar Orientational Order in Nonlinear Optical Polymers by Second Harmonic Generation by :
Download or read book Relaxation of Polar Orientational Order in Nonlinear Optical Polymers by Second Harmonic Generation written by and published by . This book was released on 1993 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the decay of the second harmonic generation (SHG) signals from a main chain accordion and a guest/host nonlinear optical (NLO) polymer has been carried out. The shape of the decay of the SHG signal from the main chain polymer is stretched exponential with the width parameter, B, increasing with increasing, temperature. The increase in B indicates a narrowing of the distribution of relaxation times. On the other hand, the SHG decay signal from the guest/host system is found to be better described by the sum of two single exponential functions with the first short time component affected strongly by the surface change effect and the second slow component associated with the relaxation of the macroscopic polarization. The time constant of the slow component is found to be successively increasing with the poling-decay cycle and it reaches a steady state value after several cycles. The relaxation time lengthening effect is obtained both above and below T(sub g); however, the effect rapidly diminishes as the temperature is increased above T(sub g). The temperature dependence of the steady state relaxation time is not Arrhenius; the Vogel-Fulcher-Tamann equation gives a satisfactory fit to the temperature dependence data.
Book Synopsis Dipolar Orientational Relaxation in Guest/Host Amorphous Polymer Probed by Second Harmonic Generation by :
Download or read book Dipolar Orientational Relaxation in Guest/Host Amorphous Polymer Probed by Second Harmonic Generation written by and published by . This book was released on 1993 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The decay of the second harmonic signal of a nonlinear optical chromophore dispersed in an amorphous polymer matrix is investigated. The decay curve can be fit either to the Kohrausch-Williams-Watts (KWW) stretched exponential function or to a bi-exponential function. The bi-exponential fit gives a better description of the decay of the second order nonlinear optical susceptibility of the contact electrode poled amorphous NLO polymer film. The fast decay component of the relaxation curve is attributed to the combined effect of reorientation of NLO dipole and the third order optical nonlinearity. The slow decay is due to the rotational diffusion of the NLO dipole. The temperature dependence of the rotational relaxation time is found to follow the Vogel-Fulcher-Tamman equation.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1993-07 with total page 1484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1993 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electro-Optics and Second Harmonic Generation of Nonlinear Optical Polymers by :
Download or read book Electro-Optics and Second Harmonic Generation of Nonlinear Optical Polymers written by and published by . This book was released on 1992 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The susceptibilities for second harmonic generation (SHG)x31(2) x33(2) of a new high tg polymer, 1,2-benzyl-1,2-cyclohexy l-bridged syndioregic a-cyanocinncimamide (BCSCCA) have been measured by using a Maker fringe apparatus. The BCSCCA was spin coated on a quartz substrate. The film of about 1 um thickness has shown a large birefringence before poling, thus indicating molecular alignment due to spin coating. The polar order was induced by poling the film at 215 C with the corona discharge. The SHG coefficients d33 is equal to 3.54 pm/V and dl3 = 0.95 pm/V at 532 nm. The d-coefficients are stable and show negligible decay over one month. The SHG intensities at 532, 528, 476, 403, 366 mn are also observed. A large resonance enhancement in the SHG intensity was observed inside the absorption band.
Book Synopsis Comparative Assessment of Different Poling Techniques of Nonlinear Optical Polymers by Optical Second Harmonic Generation by : Siu Wai Chan
Download or read book Comparative Assessment of Different Poling Techniques of Nonlinear Optical Polymers by Optical Second Harmonic Generation written by Siu Wai Chan and published by . This book was released on 2003 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book JJAP written by and published by . This book was released on 1993 with total page 756 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :University of Minnesota. Institute for Mathematics and Its Applications Publisher : ISBN 13 : Total Pages : pages Book Rating :4.:/5 (123 download)
Book Synopsis Second Harmonic Generation in Nonlinear Optical Films by : University of Minnesota. Institute for Mathematics and Its Applications
Download or read book Second Harmonic Generation in Nonlinear Optical Films written by University of Minnesota. Institute for Mathematics and Its Applications and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Polymers and Organics for Optical Second Harmonic Generation by : Ilya Gorodisher
Download or read book Novel Polymers and Organics for Optical Second Harmonic Generation written by Ilya Gorodisher and published by . This book was released on 1990 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Japanese Journal of Applied Physics by :
Download or read book Japanese Journal of Applied Physics written by and published by . This book was released on 1993 with total page 1016 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physics Briefs written by and published by . This book was released on 1991 with total page 942 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Springer Handbook of Lasers and Optics by : Frank Träger
Download or read book Springer Handbook of Lasers and Optics written by Frank Träger and published by Springer Science & Business Media. This book was released on 2012-05-05 with total page 1704 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new edition features numerous updates and additions. Especially 4 new chapters on Fiber Optics, Integrated Optics, Frequency Combs and Interferometry reflect the changes since the first edition. In addition, major complete updates for the chapters: Optical Materials and Their Properties, Optical Detectors, Nanooptics, and Optics far Beyond the Diffraction Limit. Features Contains over 1000 two-color illustrations. Includes over 120 comprehensive tables with properties of optical materials and light sources. Emphasizes physical concepts over extensive mathematical derivations. Chapters with summaries, detailed index Delivers a wealth of up-to-date references.
Book Synopsis Nonlinear Optical Effects in Organic Polymers by : J. Messier
Download or read book Nonlinear Optical Effects in Organic Polymers written by J. Messier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Chemical Abstracts written by and published by . This book was released on 1991 with total page 2682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Materials by : Robert E. Newnham
Download or read book Properties of Materials written by Robert E. Newnham and published by Oxford University Press. This book was released on 2005 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: Crystals are sometimes called 'Flowers of the Mineral Kingdom'. In addition to their great beauty, crystals and other textured materials are enormously useful in electronics, optics, acoustics and many other engineering applications. This richly illustrated text describes the underlying principles of crystal physics and chemistry, covering a wide range of topics and illustrating numerous applications in many fields of engineering using the most important materials today. Tensors, matrices, symmetry and structure-property relationships form the main subjects of the book. While tensors and matrices provide the mathematical framework for understanding anisotropy, on which the physical and chemical properties of crystals and textured materials often depend, atomistic arguments are also needed to quantify the property coefficients in various directions. The atomistic arguments are partly based on symmetry and partly on the basic physics and chemistry of materials. After introducing the point groups appropriate for single crystals, textured materials and ordered magnetic structures, the directional properties of many different materials are described: linear and nonlinear elasticity, piezoelectricity and electrostriction, magnetic phenomena, diffusion and other transport properties, and both primary and secondary ferroic behavior. With crystal optics (its roots in classical mineralogy) having become an important component of the information age, nonlinear optics is described along with the piexo-optics, magneto-optics, and analogous linear and nonlinear acoustic wave phenomena. Enantiomorphism, optical activity, and chemical anisotropy are discussed in the final chapters of the book.
