Vibrational structure of electronic states in alkali‐silicate glasses

Abstract

The cathode luminescence of the intrinsic localized electronic states in glasses was studied using the excitation with pulsed e-beam (180 keV; 700 A/cm2; 2 ns). The fine structures of luminescence spectra (frequency intervals of ν0 = 820 cm–1 and ν1 = 520–640 cm–1) were found. The effect mentioned was interpreted as a manifestation of electron-vibrational interactions during the radiative triplet-singlet relaxation of excited L-centers. It is shown that the electronic excitations interact with the local vibrations of non-bridging oxygen atoms and phonon modes of glass network. (© 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)