Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain applications
Abbreviated Journal Title
J. Non-Cryst. Solids
Raman scattering; Neutron scattering; Raman gain; Boson peak; BOSON PEAK; VIBRATIONAL EXCITATIONS; COUPLING COEFFICIENT; LIGHT-SCATTERING; VITREOUS SILICA; STATES; DENSITY; DEPENDENCE; DYNAMICS; DISORDER; Materials Science, Ceramics; Materials Science, Multidisciplinary
We present measurements of the vibrational spectrum of a binary niobium-phosphate glass in the THz frequency range using inelastic neutron and Raman scattering. The spectra of these glasses show a low-frequency enhancement of the vibrational density of states ("boson peak"). Using a recently developed theory of vibrational excitations in disordered solids we are able to reconcile the measured neutron and Raman spectra using fluctuating elastic and Pockels constants as a model concept. As the spontaneous Raman susceptibility is a key parameter for Raman amplification our results suggest a significant gain profile for application of niobium-phosphate glasses in Raman amplifiers. (C) 2010 Elsevier B.V. All rights reserved.
Journal of Non-Crystalline Solids
"Inelastic neutron and low-frequency Raman scattering in a niobium-phosphate glass for Raman gain applications" (2011). Faculty Bibliography 2010s. 2016.