Theory of Light Scattering in Condensed Matter : Proceedings of the First Joint USA-USSR Symposium

The First Binational USA-USSR Seminar-Symposium on the Theory of Light Scattering in Condensed Matter was held in Moscow 26-30 May 1975. The initial conception for a light scattering seminar of about fifty scientists - half from each side, including theorists and experimenters "well versed in theory" - arose from discussions between Professor J. L. Birman and Professor K. K. Rebane at the 1971 Paris International Conference on Light Scattering in Solids. This conception won approval among the active scientists on both sides. After considerable planning and some delays, it received both material support and encouragement from the appro­ priate organizations on each side: in the USA: The National Science Foundation (Division of International Programs), and the National Academy of Sciences; in the USSR: the Academy of Sciences USSR. A variety of reasons contributed to the positive response on both sides: for example, the considerable and high level of theoretical and experimental scientific activity on both sides in laser-related light scattering, optics, and generally - electro­ dynamics of condensed media - some along rather similiar lines; the impediments to free and easy communication and travel be­ tween USA and USSR scientists working on related problems; plus the desire to improve both contacts, and the free flow of informa­ tion and individuals, to the mutual advantage of both sides. Front Matter....Pages i-xxiv Front Matter....Pages 1-1 Light Scattering in the Vicinity of Phase Transition Points in Solids....Pages 3-7 Comment....Pages 8-11 Critical Opalescence at Structural Phase Transitions....Pages 13-29 Raman Spectra and Structural Phase Transitions in Improper Ferroelastics Hg 2 Cl 2 and Hg 2 Br 2 ....Pages 31-52 Measurement of Liquid Crystal Orientational Statistics by Raman Scattering....Pages 53-66 The Van Der Waals Forces and Light Scattering in Liquid Crystals....Pages 67-75 Front Matter....Pages 77-77 Quasiparticle Interactions in Many-Body Systems....Pages 79-87 Weakly-Bound Excitation States in Crystals....Pages 89-108 Polariton Fermi-Resonance in the Raman Spectrum of Ammonium Chloride....Pages 109-118 Light Absorption and Scattering by Nonlinear Local and Quasi-Local Oscillation....Pages 119-127 Intervalley Phonon Raman Scattering in Many-Valley Semiconductors....Pages 129-143 Front Matter....Pages 145-145 The Investigation of Exciton Condensation in Germanium by the Light Scattering Method....Pages 147-161 Experiments on Light Scattering from Electron Hole Drops in Germanium....Pages 163-170 Comment....Pages 171-172 Inelastic X-Ray Raman Scattering....Pages 173-188 Raman Scattering by Local Plasmons and Electron-Hole Drops....Pages 189-199 Raman Scattering in Metals and Heavily Doped Semiconductors....Pages 201-217 Front Matter....Pages 219-219 Interaction of Electromagnetic Waves with Free Electrons....Pages 221-223 Relation between Light-scattering Cross-sections and the Nonlinear Optical Susceptibilities of Liquids and Solids....Pages 225-233 Comments....Pages 234-234 Front Matter....Pages 219-219 Theory of Light Scattering from Light in Molecular Crystals....Pages 235-242 Coherent Active Spectroscopy of Raman Scattering: Comparison with Spectroscopy of Spontaneous Scattering....Pages 243-261 Raman Scattering Induced by Strongly Nonequilibrium Phonons....Pages 263-269 Multiphonon Raman Scattering in Semiconducting Crystals....Pages 271-287 Light Scattering as a Method of Studying the Transformation of Incoherent Phonon Flux into a Coherent Acoustical Signal....Pages 289-296 Front Matter....Pages 297-297 Excitons, Polaritons and Light Absorption in Crystals....Pages 299-327 Neutron Scattering and Absorption by Laser Photons in Crystals....Pages 329-340 Spatial Dispersion and Damping of Plasmonphonon Modes in Semiconductors....Pages 341-349 The Scattering of Light from Surface Polaritons: Line Intensities and Line Shapes....Pages 351-366 Comment....Pages 367-368 Comment....Pages 369-369 Light Scattering in Crystals with Surface Corrections....Pages 371-390 Front Matter....Pages 391-391 On the Theory of Resonant Secondary Radiation: Scattering, Luminescence, and Hot Luminescence....Pages 393-406 Comment....Pages 407-407 Comment....Pages 408-408 Resonant Raman Scattering near Excitonic Transitions....Pages 409-427 Symmetry Effects in Resonance Scattering....Pages 429-437 Light Absorption and Raman Scattering by Phonons Bound to Impurity Centers....Pages 439-446 Front Matter....Pages 447-447 Some Features of Light Raman Scattering by Bulk Polaritons....Pages 449-460 Electronic Raman Scattering....Pages 461-473 Front Matter....Pages 447-447 Theory of Spin-Flip Line Shape in Cds....Pages 475-484 Interaction between the Low Frequency Branches of a Crystal’s Energy Spectrum near Phase Transitions....Pages 485-497 Front Matter....Pages 499-499 Tricritical Points and Light Scattering in He 3 -He 4 Mixtures....Pages 501-508 Critical Scattering of Light by a Two-Component Fluid....Pages 509-516 On the Influence of Impurities on Light Scattering at Phase Transitions....Pages 517-526 Comment....Pages 527-527 Concluding Remarks....Pages 529-531 Concluding Remarks....Pages 533-535 Back Matter....Pages 537-540