This book is the fifth in a series devoted to the theory and practice of inelastic light scattering (Raman and Brillouin) as applied to amorphous and crystalline solids. This volume is concerned with the investigation by these techniques of artificial periodic structures prepared by such gas-phase deposition techniques as Molecular Beam Epitaxy. The phenomena treated involve phonons, magnons, plasmons, and other electronic excitations. The book supplies theoretical background, information on modern experimental techniques such as multichannel detectors, and a number of experimental results.