Nonlinear Optics and Collective Excitations; N. Bloembergen. Fundamentals of Spectroscopy of Collective Excitations in Solids; B. Di Bartolo. Light-Matter Interaction: Experimental Aspects; C. Klingshirn. Theoretical Description of Collective Excitations: Bloch Equations and Relaxation Mechanisms; R. Zimmerman. Linear and Nonlinear Optical Spectroscopy: Spectral, Temporal and Spatial Resolution; J.M. Hvam. The Study of Collective Excitations in Solids by Inelastic Neutron Scattering: T. Riste. Excitation Dynamics in Organic Molecules, Solids, Fullerenes, and Polymers; P. Prasad. The IR Vibrational Properties of Composite Solids and Particles: The Lyddane-Sachs-Teller Relation Revisited; A.J. Sievers. Intrinsic Localized Modes in Anharmonic Lattices; A.J. Sievers, et al. Plasmons and Surface Plasmons in Bulk Metals, Metallic Clusters, and Metallic Heterostructures; R.V. Baltz. Enlightenment of Luminescent Materials; C.R. Ronda. Spectroscopy and Development of Solid Sate Layers at NASA; N.P. Barnes. Optical Excitation and Relaxation of Solids with Defects; B. Baldacchini. Newly Developed Solid State Lasers; R. Reisfeld. Energy Transfer and Migration of Excitation in Solids and Confined Structures; F. Auzel. 45 Additional Articles. Index.