Download or read book Nonlinear Optical Studies of Molecular Adsorbates written by and published by . This book was released on 1990 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the possibility of employing laser interaction with surfaces as a surface diagnostic tool has attracted a great deal of attention. Optical second harmonic generation (SHG) and sum-frequency generation (SFG) have been proven to be most effective and versatile for surface and interfacial studies. By symmetry, these processes are forbidden in media with centrosymmetry, and can therefore be highly surface-specific. They have the advantages of being capable of high spatial temporal and spectral resolutions, suitable for in-situ, remote sensing of samples in hostile environment and applicable to all interfaces accessible to light. Indeed, they have been applied with great success to a large variety of surface and interfacial problems: probing adsorption and desorption of molecules from surfaces, measuring average molecular orientation of adsorbates, monitoring surface symmetry and surface phase transitions, conducting surface microscopy and spectroscopy, and many others. Here, we shall describe a few experiments recently carried out in our laboratory using these techniques.
Download or read book Non linear Optical Studies of Adsorbates written by Xiangdong Zhu and published by . This book was released on 1989 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Studies of Adsorbate Dynamics on Metals and Nonlinear Optical Responses at Interfaces written by Alan Shiu-Hay Wong and published by . This book was released on 1996 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linear and Nonlinear Optical Studies of Molecular Adsorption to Silica liquid Interfaces written by Brittany Lauren Gray Woods and published by . This book was released on 2015 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Adsorption mechanisms at buried interfaces are difficult to predict a priori, with many interactions to consider including those between the substrate and solvent, the substrate and adsorbate, and the solvent and adsorbate. Studies described in this thesis examine the roles these variables have on controlling interfacial behavior, including molecular adsorption and aggregation at solid/liquid interfaces. Specifically, second harmonic generation (SHG) was employed to characterize adsorption environments and adsorption energies at different silica/liquid interfaces, due to the technique's surface specificity. Additionally, time resolved fluorescence was used to quantify emission lifetimes within these same interfacial regions. By systematically changing the substrate, solvent identity, and adsorbate functionality, the impact of each contribution was identified and quantified. Initial studies examined the role played by interfacial pH in controlling adsorption. Above pH 5, silica surfaces become negatively charged and promote two distinct adsorption mechanisms. Adsorption due to these mechanisms requires very long equilibration times (>3hrs). Subsequent experiments studied the role played by solvent identity on interfacial solvation. At a methanol/silica interface a non-polar interfacial environment was produced, independent of solute choice. Non-polar solvents conversely create polar interfacial solvation environments. At these different solid/liquid interfaces, similarly structured coumarin dyes, C151 and C152, were examined. Slight changes in structure lead to differing behaviors at the surface, C151 terminates at monolayer coverage while C152 shows clear signs of multilayer formation. This observation is explained by the difference in hydrogen bonding opportunities for each adsorbate: C151 can accept and donate H-bonds while C152 can only accept H-bonds, resulting in more degrees of freedom for C152 at an interface and thus the possibility of aggregation.
Download or read book Notions And Perspectives Of Nonlinear Optics Proceedings Of The Third International Aalborg Summer School On Nonlinear Optics written by Ole Keller and published by World Scientific. This book was released on 1996-10-22 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with basic physical properties related to the nonlinear interaction of light and matter. Nonlinear effects in atomic (molecular) systems and condensed matter are described, and classical phenomena as well as phenomena requiring a field-quantised description are covered. Leading authorities in nonlinear optics have reviewed themes of current interest in the research literature, and described general principles of importance for newcomers to the field.
Download or read book Studies of Molecular Adsorbates at Interfaces by Optical Second harmonic Generation p nitrobenzoic Acid written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical second-harmonic generation (SHG) is surface-specific and has the sensitivity to detect submonolayers of molecules. It can be applied to study molecular adsorbates at the interface between any two centrosymmetric media. This has been demonstrated by using dye and p-nitrobenzoic acid (PNBA) molecules adsorbed on smooth fused quartz substrates as examples. With resonant SHG, the S0 A.-->. S2 transition of the adsorbed dye molecules was measured. From the polarization dependence of the SHG, the orientation of PNBA at both the air/quartz and the ethanol/quartz interfaces was deduced. By varying the concentration of PNBA in ethanol, an adsorption isotherm for PNBA at the ethanol/quartz interfaces was also obtained.
Download or read book Nonlinear Optical Studies of Liquid Crystals and Polymers written by Xiaowei Zhuang and published by . This book was released on 1996 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Organic Molecules for Nonlinear Optics and Photonics written by J. Messier and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonics is being labelled by many as the technology for the 21st century. Because of the structural flexibility both at the molecular and bulk levels, organic materials are emerging as a very important class of nonlinear optical materials to be used for generating necessary nonlinear optical functions for the technology of photonics. Since the last NATO advanced research workshop on "Polymers for Nonlinear Optics"held in June 1988, at Nice - Sophia Antipolis, France. there has been a tremendous growth of interest worldwide and important development in this field. Significant progress has been made in theoretical modeling, material development, experimental studies and device concepts utilizing organic materials. These important recent developments provided the rationale for organizing the workshop on "Organic Materials for Nonlinear Optics and Photonics" which was held in La Rochelle, France, in August 1990. This proceeding is the outcome of the workshop held in La Rochelle. The objective of the workshop was to bring together scientists and engineers of varied backgrounds working in this field in order to assess the current status of this field by presenting significant recent developments and make recommendations on future directions of research. The workshop was multidisciplinary as it had contributions from chemists, physicists, materials scientists and device engineers. The participants were both from industries and universities. The workshop included plenary lectures by leading international scientists in this field, contributed research papers and a poster session. Panel discussion groups were organized to summarize important developments and to project future directions.
Download or read book Laser Optics of Condensed Matter written by E. Garmire and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Fourth USA-USSR Symposium. on The Physics of Optical Phenomena and Their Use as Probes of Matter, was held in Irvine, California, January 23-27, 1990. Participating in the Symposium were 22 scientists from the USSR and 29 from the USA. In addition, to provide an international dimension to this Symposium without, however, compromising significantly its essentially binational character, 7 non-US and non-USSR scientists were invited to take part in it. The present volume is the proceedings of that Symposium, and contains all manuscripts received prior to August 1, 1990, representing. scientific contributions presented. A few manuscripts were not received, but for completeness the corresponding abstract is printed.. Three previous USA/USSR Binational Symposia on related topics have been held, viz. "Theory of Light Scattering in Condensed Matter" (Moscow, 1975), "Light Scattering in Solids" (New York, 1979), and "Laser Optics of Condensed Matter" (Leningrad, 1987). These meetings were evaluated by the participants as highly successful and provided invaluable oppor tunities for researchers to exchange information and to initiate colla borative work which led to research visits by US physicist to Soviet laboratories, and vice versa, and which continue to the present day.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1992 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid Solution Studies of the Molecular Nonlinear Optical Properties of Organic Chromophores written by David Healy and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Linear and Nonlinear Optical Studies of Liquid Crystal Interfaces written by Wei Chen and published by . This book was released on 1989 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structures Phase Transitions and Nonlinear Optical Properties of Ultra thin Molecular Films written by Minchul Yang and published by . This book was released on 2002 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Optics of Condensed Matter written by Elsa M. Garmire and published by Springer Science & Business Media. This book was released on 1991 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Session 1 Elementary Excitations and Excitation Transport.- Picosecond Resolved Optically Driven Phonon Dynamics.- Relaxation and Propagation of High Frequency Phonons in Thin Crystalline Plates After Intense Laser Pumping.- Evolution in Real Time and Space of Short Polariton Pulses in Crystals.- Quasielastic Electronic Light Scattering in Semiconductors at Low Concentrations of Current Carriers.- Condensed Matter Science With Far Infra Red Free Electron Lasers (Abstract).- Nonequilibrium Terahertz Range Acoustic Phonons and Luminescence of Excitons in Semiconductors.- Session II Optical Properties of Surfaces and Interfaces.- Nonlinear Optical Studies of Molecular Adsorbates.- Enhancement of Exciton Transition Probabilities in Ultrathin Films of Cadmium Telluride.- Studies of Semiconductor Surfaces and Interfaces by Three Wave Mixing Spectroscopy (Abstract).- Time-Resolved Resonant Reflection of Light.- Femtosecond Photoemission Studies of Image Potential and Electron Dynamics in Metals.- High Intensity, Ultrashort Pulse Laser Heated Solids.- Session III Optical Studies of Growth, Instabilities and Pattern Formation.- Control of Transversal Interactions in Nonlinear Optics: New Spatio-Temporal Effects in Nonlinear Wave Dynamics (Abstract).- Synchronization of Atomic Quantum Transitions by Light Pulses.- Chaos in Nonlinear Optics.- Self-Organizaiton and Spatio-Temporal Chaos in Phase-Locked Semiconductor Laser Arrays (Abstract).- Competitive and Cooperative Dynamics in Optical Neural Networks (Abstract).- Transitions Between Ordered and Disordered Solid-Melt Patterns Formed on Silicon by Continuous Laser Beams: Competition Between Electrodynamics and Thermodynamics.- Session IV Elementary Excitations and Excitation Transport.- Light Scattering in Oxide Superconductors.- Raman Scattering in High-Tc Superconductors YBa2Cu3Ox With Different Oxygen Contents.- Raman Scattering from High Temperature Superconductors.- Decay of Exciton Gratings in Anthracene: Anisotropy of Lowest Exciton Bands and Coexistence of Longpath and Shortpath Waveguide Modes.- Excitation Transport in Polymeric Solids.- Vibron Lifetimes in Molecular Crystals.- Session V Optical Properties of Critical Phenomena Random Systems, and Coherent Phenomena.- Anomalies of the Elastic Light Scattering at Phase Transitions in Crystals with Point Defects.- Dynamical Fluctuations in a Dipolar Glass.- Localization of Light in Random Media (Abstract).- Quantum Optic and Transient Effects of Excitonic Polaritons, and Properties of Phonoritons.- Nonclassical Field Correlations in Quantum Optics (Abstract).- Phase-Conjugated Wave Enhanced by Weak Localization of Exciton-Polaritons.- Session VI Nonlinear Optical Properties of Semiconductors Organics and Fibers.- The Historical Relationship Between Nonlinear Optics and Condensed Matter (Abstract).- Optical Nonlinearities Enhanced by Carrier Transport.- Organic Nonlinear Optical Materials and Devices for Optoelectronics (Abstract).- Nonlinear Optical Susceptibilities of Surface Layers of Metals and Super- and Semiconductors Related to Electronic Structure and Crystal Symmetry.- Second Harmonic Generation in Optical Fibers.- Nonlinear Optical Probes of Glassy Polymers.- Session VII Quantum Wells.- Photoluminescence of Hot Electrons and Scattering Processes in Quantum-Well Structures.- High Resolution Nonlinear Laser Spectroscopy Measurements of Exciton Dynamics in GaAs Quantum Well Structures.- Optical Spectroscopy in the Regime of the Fractional Quantum Hall Effect.- Geminate Recombination in MQW Structures in a Magnetic Field.- Investigation of Two-Electron-Hole Pair Resonances in Semiconductor Quantum Dots.- Many Body Effects in Homogeneous Quasi 2D Electron-Hole Plasma in Undoped and Modulation Doped InGaAs Single Quantum Wells.- Session VIII Recent Significant Developments.- Pulsed Diffusing-Wave Spectroscopy in Dense Colloids.- Waves on Corrugated Surfaces: K-Gaps and Enhanced Backscattering.- Black Hole Radiation: Can Vir...
Download or read book Surface Studies with Lasers written by F.R. Aussenegg and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physics and chemistry of surfaces is becoming more and more important as an exciting field of basic research as well as in devices and technology. The diagnoses and the conditioning of surfaces and studies of molecular interac tions with surfaces have made large advancements by using laser techniques. With its divisional meeting 1983 the Quantum Electronics Division of the European Physical Society tried to set up a forum where the latest ideas and achievements could be presented and discussed. The wide range of topics (gen eral surface spectroscopy, surface-enhanced optical processes, laser surface spectroscopy, laser-induced processes at surfaces) was deliberately chosen to provide an opportunity for specialists from one field to get acquainted with the techniques and results from others. This meeting took place in Mauterndorf, Austria, from March 9th to March 11th, 1983. Mauterndorf is a small village in the Austrian Alps, situated in a well-known skiing area. The conference was held in a medieval castle adapt ed as a conference center. These stimulating surroundings guaranteed a vivid exchange of ideas among the 98 participants from 17 nations. Among the numerous people engaged in the organization, our special thanks go to Mrs. I. Mandl and Mrs. B. Seeberg for doing a superb job in implementing the meeting arrangements and efficiently prompting the authors to deliver their manuscripts for this volume in time.
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.
Download or read book Frontiers in Surface Science and Interface Science written by C.B. Duke and published by Gulf Professional Publishing. This book was released on 2002-05-21 with total page 1076 pages. Available in PDF, EPUB and Kindle. Book excerpt: Any notion that surface science is all about semiconductors and coatings is laid to rest by this encyclopedic publication: Bioengineered interfaces in medicine, interstellar dust, DNA computation, conducting polymers, the surfaces of atomic nuclei - all are brought up to date. Frontiers in Surface and Interface Science - a milestone publication deserving a wide readership. It combines a sweeping expert survey of research today with an educated look into the future. It is a future that embraces surface phenomena on scales from the subatomic to the galactic, as well as traditional topics like semiconductor design, catalysis, and surface processing, modeling and characterization. And, great efforts have been made to express sophisticated ideas in an attractive and accessible way. Nanotechnology, surfaces for DNA computation, polymer-based electronics, soft surfaces, interstellar surface chemistry - all feature in this comprehensive collection.
