Download or read book Optical Studies of Dynamical Processes in Disordered Systems Progress Report written by and published by . This book was released on 1994 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present an abbreviated summary of the progress they have attained in the course of the abbreviated first year of the present three-year grant. The focus of their research continues to be on studies which help them understand various dynamical processes which affect the structure and the optical properties of disordered and amorphous materials. They continue to make significant progress in their attempts to understand the factors which affect, for example, the efficiencies of activated glasses. This report contains a brief description of the work they have carried out during the present grant period and an outline of the initiatives they are presently undertaking or continuing during the second period.
Download or read book Optical Studies of Dynamical Processes in Disordered Systems written by and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Studies of Dynamical Processes in Disordered Systems Annual Progress Report written by and published by . This book was released on 1993 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focus continues to be on dynamical processes such as relaxation and energy diffusion which affect the structure and optical properties of disordered and amorphous materials, particularly glasses which are luminescent in the near infrared and their efficiency. Elementary excitations in amorphous materials are also under study. 12 refs.
Download or read book Optical Studies of Dynamical Processes in Disordered Systems Progress Report 1993 1994 written by and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present a brief summary of the progress we have attained in the course of the second year of the present three year rant. The focus of our research continues to be on studies of those dynamical processes such as relaxation and energy diffusion which affect the structure and the optical properties of disordered and amorphous materials. We have been particularly concerned with some new glass compositions which are luminescent in the near infrared (NIR) and on the factors which determine the efficiencies of these materials. In addition, we have begun to investigate the nature and the dynamics of the elementary excitations characteristic of amorphous materials.
Download or read book Dynamical Processes in Disordered Systems written by William M. Yen and published by Trans Tech Publications Ltd. This book was released on 1991-01-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials Science Forum Vol. 51
Download or read book Dynamical Processes In Condensed Molecular Systems written by A Blumen and published by World Scientific. This book was released on 1989-05-01 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: This review volume provides an up-to-date review of experimental methods and theoretical approaches in the study of dynamical processes in condensed molecular systems. The experimental contributions include hole burning in glasses and in proteins, optical dephasing in glasses, photo-conductivity in polymers, energy transfer among molecules in confining spaces and electron transfer in polar solvents. The theoretical part summarizes recent advances on hole burning, hierarchical aspects of relaxation and transport in disordered systems.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiscal year 1985 Department of Energy authorization written by United States. Congress. House. Committee on Science and Technology. Subcommittee on Energy Development and Applications and published by . This book was released on 1985 with total page 1674 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dynamical Processes In Condensed Molecular Systems Proceedings Of The Emil warburg Symposium written by A Blumen and published by World Scientific. This book was released on 1990-12-19 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research on condensed molecular solids is truly interdisciplinary, spanning the range from statistical and molecular physics to solid-state-physics, chemistry, up to materials science. This Symposium on dynamical processes in condensed molecular systems highlights the most recent developments in the field, focussing on low-dimensional and non-crystalline materials, such as Langmuir-Blodgett-films, polymers and glasses. The text includes both advanced experimental techniques (hole-burning, fluorescence, short-time pulses, nonlinear spectroscopy) and also modern theoretical approches (dynamical percolation, fractals, localization).
Download or read book Disordered Solids written by Baldassare Di Bartolo and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents an account of the course "Disordered Solids: Structures and Processes" held in Erice, Italy, from June 15 to 29, 1987. This meeting was organized by the International School of Atomic and Molecular Spectroscopy of the "Ettore Majorana" Centre for Scientific Culture. The objective of this course was to present the advances in physical modelling, mathematical formalism and experimental techniques relevant to the interpretation of the structures of disordered solids and of the physical processes occurring therein. Traditional solid-state physics treats solids as perfect crystals and takes great advantage of their symmetry, by means of such mathematical formalisms as the reciprocal lattice, the Brillouin zone, and the powerful tools of group theory. Even if in reality no solid is a perfect crystal, this theoretical approach has been of great usefulness in describing solids: deviations from perfect order have been treated as perturbations of the ideal model. A new situation arises with truly disordered solids where any vestige of long range order has disappeared. The basic problem is that of describing these systems and gaining a scientific understanding of their physical properties without the mathematical formalism of traditional solid state physics. While some of the old approaches may occasionally remain valid (e. g. chemical bonding approach for amorphous solids), the old ways will not do. Disorder is not a perturbation: with disorder, something basically new may be expected to appear.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 908 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes all works deriving from DOE, other related government-sponsored information and foreign nonnuclear information.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1994 with total page 1746 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biomedical Index to PHS supported Research written by and published by . This book was released on 1995 with total page 1216 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 Disorder Effects on Relaxational Processes written by Ranko Richert and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 745 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of non-crystalline materials has seen the emergence of many challeng ing problems during its long history. In recent years, the interest in polymeric and biological disordered matter has stimulated new activities which in turn have enlarged the organic and inorganic glass community. The current research fields and recent progress have extended our knowledge of the rich phenomenol ogy of glassy systems, where the role of disorder is fundamental for the underlying microscopic dynamics. In addition, despite the lack of a unified theory, many interesting theoretical models have recently evolved. The present volume offers the reader a collection of topics representing the current state in the understanding of disorder effects as well as a survey of the basic problems and phenomena involved. The task of compiling a book devoted to disordered systems has benefited much from a seminar organized by the W.-E. Heraeus Foundation in Bad Honnef in April 1992, where we had the opportunity to discuss the project with most of the authors. Here we wish to thank the Heraeus Foundation for their support, and the authors and Springer-Verlag, especially Dr. Marion Hertel, for the pleasant cooperation.
Download or read book Opticals Effects in Liquid Crystals written by I. Jánossy and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1988 physicists and chemists commemorated the centenary of the discovery of the first liquid crystals. Fora long period after this discovery, although many significant results were found, liquid crystal research remained a marginal topic of condensed matter physics. The situation changed in the sixties. At that time the remarkable electro-optical properties of liquid crystals were recognized and found soon widespread application in numeric displays. From a more fundamental point of view, the interest in disordered systems. increased in general at the same time. Liquid crystals represented an important dass of such systems. Among others, phase transitions, hydrodynamics and topological defects occurring in them attracted considerable attention. The connection between the liquid-crystalline state and the structure of biological membranes stimulated a Iot of works also. In the present volume we discuss a relatively new and rapidly developing branch of the fi. eld, namely nonlinear optical effects in liquid crystals. Optical studies have always played a signifi. cant role in liquid crystal science. Research of optical nonlinearities in liquid crystals began at the end of the sixties. Since then it became a powerful tool in the investigation of symmetry properties, interfacial phenomena or dynamic behaviour. Furthermore, several new aspects of nonlinear processes were demonstrated and studied extensively in liquid crystals. The subject covered in this book is therefore of importance both for liquid crystal research and for nonlinear optics itself. The term "nonlinear optics" is used here in a broad sense.
