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Origin Of The Highly Efficient Third Order Optical Response In Small Organic Molecules
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Book Synopsis Origin of the Highly Efficient Third-order Optical Response in Small Organic Molecules by : Joshua C. May
Download or read book Origin of the Highly Efficient Third-order Optical Response in Small Organic Molecules written by Joshua C. May and published by . This book was released on 2007 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for materials with high optical nonlinearity has driven decades of research, with little success in developing materials that are suitable for third-order nonlinear optical applications that utilize the intensity-dependent refractive index or intensity-dependent absorption, for example. Organic materials, with their highly delocalized electron systems that lead to large nonlinearities and fast (10-15 s) optical response times and the relative ease at which their molecular properties can be tailored (allowing certain molecular properties to be isolated and optimized through molecular structure variations), are ideal candidates for the next generation of nonlinear optical materials. These materials have led to the largest molecular nonlinearities measured, but still remained several orders of magnitude below their theoretical limits. Our aim in this work is to approach the absolute limit, but also to keep the molecular size small. This research direction should lead to a dense packing of molecules with high nonlinearity in the solid state, which will then lead to the large bulk nonlinearities necessary for all-optical applications. With donor-substituted cyanoethynylethene molecules, we have measured off-resonant nonlinearities within a factor of 50 of their theoretical limits and predict that solid-state devices made from these materials can be up to an order of magnitude larger than other materials made from organic molecules. By measuring a large number of molecules with different structural variations, we have isolated the electron donor and acceptor structures as necessities for large third-order nonlinearities in small molecules. Our best molecule has a molecular third-order polarizability per mass of g & d5; rot = 6.5 x 10-23 m5V-2Kg-1, the highest value measured to date. We have also measured our molecules on resonance, which leads to measurements of the two-photon absorption cross-section sigma TPA. These measurements give a value of 9 x 10 -48 cm4s/photon for our best molecule, which is an order of magnitude larger than a chromophore optimized for two-photon absorption. Because of the record high results measured in these molecules, along with their ability to be vapor deposited into integrated devices, we suggest that this family of molecules may be the predecessors to the next generation of applied third-order nonlinear optical materials.
Book Synopsis Dissertation Abstracts International by :
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2008 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Halide Perovskites by : Tze-Chien Sum
Download or read book Halide Perovskites written by Tze-Chien Sum and published by John Wiley & Sons. This book was released on 2019-03-25 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Real insight from leading experts in the field into the causes of the unique photovoltaic performance of perovskite solar cells, describing the fundamentals of perovskite materials and device architectures. The authors cover materials research and development, device fabrication and engineering methodologies, as well as current knowledge extending beyond perovskite photovoltaics, such as the novel spin physics and multiferroic properties of this family of materials. Aimed at a better and clearer understanding of the latest developments in the hybrid perovskite field, this is a must-have for material scientists, chemists, physicists and engineers entering or already working in this booming field.
Book Synopsis Femtosecond Technology by : T. Kamiya
Download or read book Femtosecond Technology written by T. Kamiya and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent rapid advances in femtosecond technology have had a great impact on their industrial applications such as: ultrafast optoelectronic devices and optical telecommunication systems, ultrashort-pulse lasers and measurement systems, and the development of novel materials for ultrafast functions. In this book, a wealth of knowledge covering requirements in applications details of recent achievements in important technical areas is presented by world-prominent authors in a concise, systematic form. As a whole, this is the first comprehensive book on the emerging field of femtosecond technology.
Book Synopsis Optimization of Donor-Acceptor Substitution for Large Optical Non-linearities in Small Organic Molecules by : Marten Beels
Download or read book Optimization of Donor-Acceptor Substitution for Large Optical Non-linearities in Small Organic Molecules written by Marten Beels and published by . This book was released on 2013 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: The determination of the wavelength dependence of the complex third-order polarizability of organic molecules delivers information on the mechanisms of resonance enhancement and allows for comparison of the two-photon absorption cross sections on their peak to the off-resonant third-order polarizabilities. The experimental technique of degenerate four-wave mixing offers several advantages over other comparable techniques, including sensitivity, background-free signal, automatization, and information on excited state lifetimes. This work uses experimental data, computational chemistry, and analysis of the relevant terms in the sum-over-states quantum mechanics expression to analyze the significant contributions to the third-order polarizability, mechanisms of resonance enhancement, and comparison of the off resonant values, to peak resonant values. This information provides insight to the structure-property relationships for the third-order polarizability, allows for comparison to fundamental limits, and assessment of the potential for molecules to form solid state materials with a large third-order susceptibility. The use of donor-acceptor (D/A) substitution allows for the realization of small molecules with large third-order polarizabilities. However, in contrast to symmetric non-D/A oligomers that have third-order polarizabilities which scale by a power law as the molecule is made larger, D/A substituted molecules only scale up to a certain length, beyond which the molecule is over-extended and the third-order polarizability does not increase further. This work will analyze the scaling of non-D/A and D/A substituted molecules, determine the optimum length for D/A substituted molecules, and explain the physics of the saturation.
Book Synopsis Journal of the Optical Society of America by :
Download or read book Journal of the Optical Society of America written by and published by . This book was released on 1989 with total page 1312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Manthos G. Papadopoulos Publisher :Springer Science & Business Media ISBN 13 :1402048505 Total Pages :676 pages Book Rating :4.4/5 (2 download)
Book Synopsis Non-Linear Optical Properties of Matter by : Manthos G. Papadopoulos
Download or read book Non-Linear Optical Properties of Matter written by Manthos G. Papadopoulos and published by Springer Science & Business Media. This book was released on 2007-05-03 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book assembles both theory and application in this field, to interest experimentalists and theoreticians alike. Part 1 is concerned with the theory and computing of non-linear optical (NLO) properties while Part 2 reviews the latest developments in experimentation. This book will be invaluable to researchers and students in academia and industry, particularlrly to anyone involved in materials science, theoretical and computational chemistry, chemical physics, and molecular physics.
Book Synopsis Third Order Nonlinearity of Organic Molecules by : Honghua Hu
Download or read book Third Order Nonlinearity of Organic Molecules written by Honghua Hu and published by . This book was released on 2012 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this dissertation is to investigate the third-order nonlinearity of organic molecules. This topic contains two aspects: two-photon absorption (2PA) and nonlinear refraction (NLR), which are associated with the imaginary and real part of the third-order nonlinearity ([chi]3) of the material, respectively. With the optical properties tailored through meticulous molecular structure engineering, organic molecules are promising candidates to exhibit large third-order nonlinearities. Both linear (absorption, fluorescence, fluorescence excitation anisotropy) and nonlinear (Z-scan, two-photon fluorescence, pump-probe) techniques are described and utilized to fully characterize the spectroscopic properties of organic molecules in solution or solid-state form. These properties are then analyzed by quantum chemical calculations or other specific quantum mechanical model to understand the origins of the nonlinearities as well as the correlations with their unique molecular structural features. These calculations are performed by collaborators. The 2PA study of organic materials is focused on the structure-2PA property relationships of four groups of dyes with specific molecular design approaches as the following: (1) Acceptor-[pi]-Acceptor dyes for large 2PA cross section, (2) Donor-[pi]-Acceptor dyes for strong solvatochromic effects upon the 2PA spectra, (3) Near-infrared polymethine dyes for a symmetry breaking effect, (4) Sulfur-squaraines vs. oxygen-squaraines to study the role of sulfur atom replacement upon their 2PA spectra. Additionally, the 2PA spectrum of a solid-state single crystal made from a Donor-[pi]-Acceptor dye is measured, and the anisotropic nonlinearity is studied with respect to different incident polarizations. These studies further advance our understanding towards an ultimate goal to a predictive capability for the 2PA properties of organic molecules. The NLR study on molecules is focused on the temporal and spectral dispersion of the nonlinear refraction index, n2, of the molecules. Complicated physical mechanisms, originating from either electronic transitions or nuclei movement, are introduced in general. By adopting a prism compressor / stretcher to control the pulsewidth, an evolution of n2 with respect to incident pulsewidth is measured on a simple inorganic molecule--carbon disulfide (CS2) in neat liquid at 700 nm and 1064 nm to demonstrate the pulsewidth dependent nonlinear refraction. The n2 spectra of CS2 and certain organic molecules are measured by femtosecond pulses, which are then analyzed by a 3-level model, a simplified "Sum-over-states" quantum mechanical model. These studies can serve as a precursor for future NLR investigations.
Book Synopsis Organic Thin Films for Waveguiding Nonlinear Optics by : F. Kajzar
Download or read book Organic Thin Films for Waveguiding Nonlinear Optics written by F. Kajzar and published by CRC Press. This book was released on 1996-10-15 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1996. Routledge is an imprint of Taylor & Francis, an informa company.
Book Synopsis Nonlinear Optical Properties of Organic Molecules and Crystals V2 by : D.S. Chemla
Download or read book Nonlinear Optical Properties of Organic Molecules and Crystals V2 written by D.S. Chemla and published by Elsevier. This book was released on 2012-12-02 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Optical Properties of Organic Molecules and Crystals, Volume 2 deals with the nonlinear optical properties of organic molecules and crystals, with emphasis on cubic nonlinear optical effects and and the intermolecular bond. Topics covered include the basic structural and electronic properties of polydiacetylenes; cubic effects in polydiacetylene solutions and films; and degenerate third-order nonlinear optical susceptibility of polydiacetylenes. Dimensionality effects and scaling laws in nonlinear optical susceptibilities are also considered. This volume is comprised of seven chapters divided into two sections and begins with a discussion on the basic structural and electronic properties of polydiacetylenes as well as their methods of preparation. Cubic nonlinearities in polydiacetylene solutions and films are then examined, paying particular attention to polarization in one-dimensional media; multiple reflections of fundamental and harmonic waves; and harmonic generation in an absorbing medium. The following chapters focus on degenerate third-order nonlinear optical susceptibility of polydiacetylenes; dimensionality effects and scaling laws in nonlinear optical susceptibilities; polarizabilities and hyperpolarizabilities of long molecules; and resonant molecular optics. The final chapter analyzes the nonlinear optics of a wide range of compounds that are held together by intermolecular bonding and form supramolecular assemblies. This monograph will be a useful resource for physicists, physical and organic chemists, and those in the field of quantum electronics.
Book Synopsis Materials for Nonlinear Optics by : Seth Richard Marder
Download or read book Materials for Nonlinear Optics written by Seth Richard Marder and published by . This book was released on 1991 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume exposes the chemistry community to the critical role that chemistry can and must play in nonlinear optics research. In addition, it brings together those researchers who synthesize and characterize materials from a variety of systems, with those who build devices, giving chemists, physicists, and engineers a greater appreciation for the opportunities that lie ahead in understanding and developing nonlinear optical materials. The volume begins with a discussion of polarizability and hyperpolarizability from the view of a chemist. Tutorial chapters dealing with the fundamental structures and properties of second- and third-order nonlinear optical materials, measurement and characterization of these systems, theoretical considerations, application of these systems to devices, and overviews of the current state of affairs in both organic and inorganic nonlinear optical materials follow.
Book Synopsis Infrared Characteristic Group Frequencies by : George Socrates
Download or read book Infrared Characteristic Group Frequencies written by George Socrates and published by Wiley. This book was released on 1994-07-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using a comprehensive and practical approach this easy-to-follow handbook is an essential addition to any analytical infrared laboratory. Stressing analytical interpretation, each chapter begins with a discussion of the steric, electronic and solvent-solute interactions which affect group frequencies, followed by related tables. Deals with organic compounds/groups as well as inorganic compounds and coordination complexes. Covers the entire infrared region and includes scores of correlation charts, figures and tables.
Book Synopsis International Conference of Computational Methods in Sciences and Engineering (ICCMSE 2004) by : Theodore Simos
Download or read book International Conference of Computational Methods in Sciences and Engineering (ICCMSE 2004) written by Theodore Simos and published by CRC Press. This book was released on 2019-04-29 with total page 1192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The International Conference of Computational Methods in Sciences and Engineering (ICCMSE) is unique in its kind. It regroups original contributions from all fields of the traditional Sciences, Mathematics, Physics, Chemistry, Biology, Medicine and all branches of Engineering. The aim of the conference is to bring together computational scientists from several disciplines in order to share methods and ideas. More than 370 extended abstracts have been submitted for consideration for presentation in ICCMSE 2004. From these, 289 extended abstracts have been selected after international peer review by at least two independent reviewers.
Book Synopsis Linear and Nonlinear Optics of Organic Materials by :
Download or read book Linear and Nonlinear Optics of Organic Materials written by and published by . This book was released on 2001 with total page 348 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 Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Book Synopsis Hybrid Organic-Inorganic Perovskites by : Li Wei
Download or read book Hybrid Organic-Inorganic Perovskites written by Li Wei and published by John Wiley & Sons. This book was released on 2020-10-19 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hybrid organic-inorganic perovskites (HOIPs) have attracted substantial interest due to their chemical variability, structural diversity and favorable physical properties the past decade. This materials class encompasses other important families such as formates, azides, dicyanamides, cyanides and dicyanometallates. The book summarizes the chemical variability and structural diversity of all known hybrid organic-inorganic perovskites subclasses including halides, azides, formates, dicyanamides, cyanides and dicyanometallates. It also presents a comprehensive account of their intriguing physical properties, including photovoltaic, optoelectronic, dielectric, magnetic, ferroelectric, ferroelastic and multiferroic properties. Moreover, the current challenges and future opportunities in this exciting field are also been discussed. This timely book shows the readers a complete landscape of hybrid organic-inorganic pervoskites and associated multifuctionalities.
