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The International Conference on Light Scattering Spectra of Solids was held at New York University on September 3, 4, 5, 6, 1968. The Conference received financial support from the U. S. Army Research Office (Durham), The New York State Science and Technology Foundation, the U. S. Office of Naval Research, and The Graduate School of Arts and Sciences of New York University. Co-sponsoring the Conference was the International Union of Pure and Applied Physics. The initial conception for the Light Scattering Conference arose from informal discussions held by Professor Eli Burstein, Professor Marvin Silver (representing the U. S. Army Research Office) and Professor Joseph Birman, late in 1966. In early discussions a format was put forth for a meeting to be held the following year, re viewing the state of the art, and emphasizing novel developments which had 9ccurred since the 1965 International Colloquium on Scattering Spectra of Crystals held in Paris (proceedings published in Le Journal de Physique, Volume 26, November 1965).
It is very rewarding for an author to know that his book is to be translated into another language and become available to a new circle of readers. The study of the optics and spectroscopy of activated crys stals has continued to grow. The development and first remarkable successes of light scattering by impurities in crystals have occurred in the comparatively short time since my original book was sent to press. After experimental observation of the sidebands (wings) in impurity infrared absorption spectra, interest in these spectra as a source of information on the vibrations of a crystal in the neigh borhood of an impurity has increased significantly. Therefore, in addition to making minor corrections, r have supplemented the section on the effect of anharmonicity (section25) and written two new sections and another Appendix on infrared ab sorption, scattering of light by an impurity center in a crystal, and the adiabatic approximation, respectively. The bibliography has received several dozen new entries, but it nevertheless does not pretend to be complete. r hope that the American edition is useful and in some de gree corresponds to the general deepening of our physical under standing of solids.
With contributions by numerous experts
This book is devoted to the problem of inelastic light scattering in semiconductors, i.e., to processes in which a photon impinges upon a serniconductor, creating or anihilating one or several quasi-particles, and then emerges with an energy somewhat different from that of the incident photon. In light scattering spectroscopy the incident photons are monochromatic; one measures the energy distribution of the scat tered photons with a spectrometer. Because of its monochromaticity, power, and collimation, lasers are ideal sources for light scattering spectroscopy. Consequently, developments in the field of light scattering have followed, in recent years, the developments in laser technology. The scattering efficiencies are usually weak and thus light scattering spectroscopy requires sophisticated double and tripie monochromators with high stray light rejection ratio. Both, powerful lasers and good monochromators are specially important for studying the scattering of light to which the sampies of interest are opaque, as is the case in most semiconductors. This explains why these materials are relatively late corners to the field of light scattering. In spite of these difficulties, the field of light scattcring in semi conductors has experienced a boom in recent years, and reached a certain degree of maturity. Because of space limitations, the editor was faced with the necessity of making a choice in the subjects to be included. In spite of the natural bias towards his own research interests he hopes to have gathered a number of articles representative of present-day research in the field.
The Second USA-USSR Symposium on Light Scattering in Con densed Matter was held in New York City 21-25 May 1979. The present volume is the proceedings of that conference, and contains all manuscripts received prior to 1 August 1979, representing scientific contributions presented. A few manus cripts were not received, but for completeness the corresponding abstract is printed. No record was kept of the discussion, so that some of the flavor of the meeting is missing. This is par ticularly unfortunate in the case of some topics which were in a stage of rapid development and where the papers presented sti mulated much discussion - such as the sessions on spatial dis persion and resonance inelastic (Brillouin or Raman) scattering in crystals, enhanced Raman scattering from molecules on metal surfaces, and the onset of turbulence in fluids. The background and history of the US-USSR Seminar-Symposia on light scattering was given in the preface to the proceedings of the First Symposium held in Moscow May 1975, published as "Theory of Light Scattering in Condensed Matter" ed. B. Bendow, J. L. Birman, V. M. Agranovich (Plenum Press, N. Y. 1976). Strong scientific interest on both sides in continuing this series resulted in a plan for the second symposium to be held in New York in 1977. For a variety of reasons it was necessary to cancel the planned 1977 event, almost at the last minute.
This is the sixth volume of a well-established and popular series in which expert practitioners discuss topical aspects of light scattering in solids. This volume discusses recent results of Raman spectroscopy of high Tc superconductors, organic polymers, rare earth compounds, semimagnetic superconductors, and silver halides, as well as developments in the rapidly growing field of time-resolved Raman spectroscopy. Emphasis is placed on obtaining information about elementary excitations, the basic properties of materials, and the use of Raman spectroscopy as an analytical tool. This volume may be regarded as an encyclopedia of condensed matter physics from the viewpoint of the Raman spectroscopist. It will be useful to advanced students and to all researchers who apply Raman spectroscopy in their work.
This text is an introductory compilation of basic concepts, methods and applications in the field of spectroscopy. It discusses new radiation sources such as lasers and synchrotrons and describes the linear response together with the basic principles and the technical background for various scattering experiments.
Laser-based optical spectroscopies are powerful and versatile techniques that are continuing to evolve and find new applications. This book presents reviews of recent progress in our understanding of the spectra and dynamical processes of optically excited states of condensed matter, focusing on the advances made possible by the application of laser-based optical spectroscopies. Reviews are given of the optical properties of crystalline and amorphous semiconducting materials and structures, the properties of defect centers in insulators, two-photon nonlinear processes in insulators, optical energy diffusion in inorganic materials, and relaxation in organic materials. The individual chapters emphasize the methodology common to the various investigations. The volume is designed to be suitable as an introduction to applied laser spectroscopy of solids, as well as providing an update on the status of the field.