Investigation of nanophase separation in IR optical glasses As40Se60 using resonant Raman scattering

摘要

Raman spectra of stoichiometric glass (g) g-As40Se60have been investigated. It was observed that the increasing of excitation radiation energy h.>E0(E0is pseudogap width) changes a shape and position of Raman peaks of g-As40Se60. The structure and vibration spectra of some As-Se clusters were cal culated applying Hartree-Fock (HF) and density functional theory (DFT). In order to elucidate structural features of g-As40Se60, we combined the experimental Raman data and theoretical calculations