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Comparative Assessment Of Different Poling Techniques Of Nonlinear Optical Polymers By Optical Second Harmonic Generation
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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:
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 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 Nonlinear Optical Susceptibility of a Model Guest/Host Polymeric System as Investigated by Electro-Optics and Second Harmonic Generation by :
Download or read book Nonlinear Optical Susceptibility of a Model Guest/Host Polymeric System as Investigated by Electro-Optics and Second Harmonic Generation written by and published by . This book was released on 1994 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The magnitude and stability of the induced dipolar orientation of a nonlinear optical (NLO) chromophore doped in an amorphous polymeric matrix is investigated. The chromophores are aligned using electric field poling. The linear electro-optic (EO) Pockels effect and Second Harmonic generation (SHG) techniques are used to probe the electric field induced alignment. Both the Pockels coefficient and the second order susceptibility show a nonlinear relationship with the NLO chromophore concentration. Using a relationship based on the two level model, the Pockels coefficient is compared with the second order nonlinear susceptibility measured by SHG. The temperature dependence of the decay time constant of the SHG signal is found to follow an empirical relationship such as the Vogel-Tammen-Fulcher (VFT) equation. The decay time constant of the SHG signal is also found to be increasing with increasing chromophore concentration. This concentration dependence is interpreted as due to orientational pair correlation between chromophores, and between chromophores and polymer chains.
Book Synopsis Handbook of Photonics by : Mool C. Gupta
Download or read book Handbook of Photonics written by Mool C. Gupta and published by CRC Press. This book was released on 1997-05-05 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: The rapidly growing area of photonics plays a critical role in many segments of industry, such as optical communications, information storage, electronic display, and other areas, and is the subject of intense academic and industrial research. The Handbook of Photonics serves as a single-source reference book for this exciting field. The book is divided into three sections: Photonic Materials Photonic Devices and Optics Photonic Systems Each chapter within these sections is written by well-known and respected authors and covers the latest information in many of the important aspects of photonics. The Handbook of Photonics provides a complete reference for scientists, engineers, and students working in this field.
Book Synopsis Second-order Optical Properties Study and the Poling Induced Dipole Alignment Stabilization of Second-order Nonlinear Optical Polymers by : Peter Miyagi Ranon
Download or read book Second-order Optical Properties Study and the Poling Induced Dipole Alignment Stabilization of Second-order Nonlinear Optical Polymers written by Peter Miyagi Ranon and published by . This book was released on 1993 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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.
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2734 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Thermal Relaxation Processes and Stability in Poled Electro-Optic Polymers by :
Download or read book Thermal Relaxation Processes and Stability in Poled Electro-Optic Polymers written by and published by . This book was released on 1997 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of gaining better understanding of the orientational decay mechanisms of poled nonlinear optical polymers and to develop a predictive description of the long time scale decay was well met. We developed a new experimental technique based on electric field induced second harmonic generation in the frequency domain to probe the polymer over many decades of time. This technique is best applied near the glass transition to probe frequencies from mHz to tens of kHz. We used this technique along with others to study a variety of polymers. Applying an Adams-Gibb model to the temperature dependence of the characteristic frequency, prediction of long term behavior at any temperature based on quick measurements near the glass transition temperature is possible. We also developed a new ultrafast laser source for studying nonlinear optical susceptibilities, and contributed to the study of cross-linked polyimide materials as stable and processable hosts for poled electro-optic polymers.
Book Synopsis Nonlinear Meta-Optics by : Costantino De Angelis
Download or read book Nonlinear Meta-Optics written by Costantino De Angelis and published by CRC Press. This book was released on 2020-05-20 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses fabrication as well as characterization and modeling of semiconductor nanostructures in the optical regime, with a focus on nonlinear effects. The visible range as well as near and far infrared spectral region will be considered with a view to different envisaged applications. The book covers the current key challenges of the research in the area, including: exploiting new material platforms, fully extending the device operation into the nonlinear regime, adding re-configurability to the envisaged devices and proposing new modeling tools to help in conceiving new functionalities. • Explores several topics in the field of semiconductor nonlinear nanophotonics, including fabrication, characterization and modeling of semiconductor nanostructures in the optical regime, with a focus on nonlinear effects • Describes the research challenges in the field of optical metasurfaces in the nonlinear regime • Reviews the use and achievements of all-dielectric nanoantennas for strengthening the nonlinear optical response • Describes both theoretical and experimental aspects of photonic devices based on semiconductor optical nanoantennas and metasurfaces • Gathers contributions from several leading groups in this research field to provide a thorough and complete overview of the current state of the art in the field of semiconductor nonlinear nanophotonics Costantino De Angelis has been full professor of electromagnetic fields at the University of Brescia since 1998. He is an OSA Fellow and has been responsible for several university research contracts in the last 20 years within Europe, the United States, and Italy. His technical interests are in optical antennas and nanophotonics. He is the author of over 150 peer-reviewed scientific journal articles. Giuseppe Leo has been a full professor in physics at Paris Diderot University since 2004, and in charge of the nonlinear devices group of MPQ Laboratory since 2006. His research areas include nonlinear optics, micro- and nano-photonics, and optoelectronics, with a focus on AlGaAs platform. He has coordinated several research programs and coauthored 100 peer-reviewed journal articles, 200 conference papers, 10 book chapters and also has four patents. Dragomir Neshev is a professor in physics and the leader of the experimental photonics group in the Nonlinear Physics Centre at Australian National University (ANU). His activities span over several branches of optics, including nonlinear periodic structures, singular optics, plasmonics, and photonic metamaterials. He has coauthored 200 publications in international peer-reviewed scientific journals.
Book Synopsis Poling Dynamics of Nonlinear Optical Guest-host Polymer Systems by : Chi Wing To
Download or read book Poling Dynamics of Nonlinear Optical Guest-host Polymer Systems written by Chi Wing To and published by . This book was released on 2006 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical and Optical Polymer Systems by : Donald L. Wise
Download or read book Electrical and Optical Polymer Systems written by Donald L. Wise and published by CRC Press. This book was released on 1998-03-27 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Offers background information, methods of characterization, and applications for electrical and optical polymers, including biopolymers, and tutorial sections that explain how to use the techniques."
Book Synopsis An Interpenetrating Polymer Network as a Stable Second Order Nonlinear Optical Material: Comparison with the Guest/Host Systems by : S. Marturunkakul
Download or read book An Interpenetrating Polymer Network as a Stable Second Order Nonlinear Optical Material: Comparison with the Guest/Host Systems written by S. Marturunkakul and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymeric materials with second order nonlinear optical (NLO) properties are of much interest for applications such as waveguide electrooptic modulation and frequency doubling devices. These NLO properties are presented when the chromophores are aligned in a noncentrosymmetric manner. The alignment of NLO chromophores in the poled polymers must be sufficiently stable at temperatures above 100 deg C in order to use them in practical devices. Several approaches have been adopted to enhance the temporal stability of the poled polymers. Enhanced temporal stability of second order NLO properties in several poled polymer systems has been achieved by crosslinking reactions. The resulting crosslinked network has a higher glass transition temperature and a denser matrix which prevent the aligned NLO chromophores from relaxing to a random orientation. However, slow decay of second order NLO properties at elevated temperatures was still observed in the polymers. Furthermore, the general form of the relaxation curves for the crosslinking polymers do not appear to be distinctly different from those for the guest/host systems. We have selected an interpenetrating polymer network (IPN) containing aligned NLO chromophores to test these issues. An IPN is a structure in which two or more networks are physically combined. The IPN is known to be able to remarkably suppress the creep and flow phenomena in polymers. Permanent entanglement of the two polymer chains restrict their mobility which leads to a significantly more stable NLO material. In this paper, we report on the design, synthesis and characterization of an NLO active IPN ... Interpenetrating polymer network, Nonlinear optical polymer.
Book Synopsis New Developments in Second-Order Nonlinear Optical Polymeric Materials by :
Download or read book New Developments in Second-Order Nonlinear Optical Polymeric Materials written by and published by . This book was released on 1994 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second harmonic generation from the spin coated films of an asymmetrically substituted polydiacethlene, namely poly((8-butoxy cardonylmethyl urethanyl) 1-(5-pyrimidyl)-octa-1,3- diyne(BPOD) is reported for the first time. The macromolecules assemble to produce the organization responsible for SHG without recourse to poling. d33 of the spin coated film (0.19-0.31 micrometers thickness) are between 0.78-0.88 pm/V without absorption correction and 3.32-5. 57 pm/V after correction. Angular and polarization dependence study of the second harmonic response suggests that the film has in-plane isotropy as a whole and the net dipole is nearly perpendicular to the film surface. Spontaneous orientation of the polymer chains during the film formation seems to be responsible for the noncentrosymmetric alignment of the polymer. SHG from the Langmuir Blodgett films are also reported. Second harmonic generation, Polydiacetylene, Spin coated films, Langmuir Blodgett films, Nonlinear optical, Polymeric materials, Aromatic substituents, SHG, PDA.
Book Synopsis Papers Presented at the ... Meeting by : American Chemical Society. Division of Polymer Chemistry
Download or read book Papers Presented at the ... Meeting written by American Chemical Society. Division of Polymer Chemistry and published by . This book was released on 1994 with total page 1046 pages. Available in PDF, EPUB and Kindle. Book excerpt:
