Investigation into Selected Problems in Solid State Physics.

摘要

During the period of the grant advances were made in the theory of nonlocal optics (spatial dispersion phenomena) in solids including prediction of new phenomena in transient optics: precursors, transient reflectivity, altered signal velocity. Surface related optical properties including lateral displacement and selective total internal reflection were investigated. All the above relate to exciton-mediated optical properties of insulators and semiconductors. New optical phenomena related to morphic effects (stress related) were determined. New electronic models for properties of the A-15 compounds were proposed - with quantitative agreement with experiment. A random stacking model for structure of amorphous tetrahedral semiconductors was proposed and tested. A two phonon Raman scattering feature in diamond was identified as an overtone.