Accession Number : AD0779038

Title :   Inelastic Light Scattering Studies of the Optical Properties of Solids.

Descriptive Note : Final rept.,

Corporate Author : IBM THOMAS J WATSON RESEARCH CENTER YORKTOWN HEIGHTS N Y

Personal Author(s) : Smith,John E. , Jr

Report Date : FEB 1974

Pagination or Media Count : 13

Abstract : The properties of several classes of solids have been studied using inelastic light scattering (Raman scattering) and complimentary techniques. The Raman and infrared spectra of amorphous solids were shown to be a measure of the vibrational density of states. The spectra of several structural models of amorphous Ge and Si have been numerically calculated; these calculations are in good agreement with experiments, thus giving support to a tetrahedrally coordinated random network model and elucidating the character of the coupling constants relating Raman and infrared spectra to the vibrational density of states. Lattice dynamics of transition metal dichalcogenide layered compounds have been studied using Raman and infrared spectroscopy. The experiments are interpreted in terms of the character and strength of the bonding in the compounds and systematics through the family of compounds. Resonant Raman scattering is studied in MoS2 and Cu2O. Preliminary results on the electronic Raman scattering of Sm ions in samarium chalcogenides are reported. These results give a measure of exchange interactions in these compounds. (Author)

Descriptors :   *Silicon, *Germanium, *Light scattering, *Raman spectra, Molybdenum compounds, Sulfides, Copper compounds, Oxides, Amorphous materials, Semiconductors, Infrared spectra

Subject Categories : Optics
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE