Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Schulte A, Guo Y, Schirmacher W, Unruh T, Cardinal T
Zeitschrift: Vibrational Spectroscopy
Verlag: ELSEVIER SCIENCE BV
Jahr der Veröffentlichung: 2008
Band: 48
Heftnummer: 1
Seitenbereich: 12-15
ISSN: 0924-2031


Abstract


Raman gain for all-optical amplification depends significantly on the cross section for spontaneous Raman scattering. We present measurements of the Raman spectrum of binary niobium-phosphate glasses in the frequency range from 5 to 1300 cm(-1). The spectra of these glasses show a low-frequency enhancement of the vibrational density of states ('Boson peak') suggesting a significant gain profile for application in Raman amplifiers as well as providing an additional mechanism for Raman gain. To separate the effects of density of states from the light-vibration coupling we carried out an inelastic neutron scattering investigation of 40Nb(2)O(5)-60NaPO(3) using the time-of-flight spectrometer (TOFrOF) at the FRM II neutron source in Munich. The Boson peak appears between 40 and 70 cm(-1) as an increase of the reduced density of states over the flat Debye approximation. Possible mechanisms contributing to the low-frequency excitations such as disorder-induced irregular vibrational states are discussed. (C) 2008 Elsevier B.V. All rights reserved.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Einrichtungen weiterer Autorinnen und Autoren

Technische Universität München (TUM)
University of Central Florida (UCF)


Zitierweisen

APA:
Schulte, A., Guo, Y., Schirmacher, W., Unruh, T., & Cardinal, T. (2008). Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications. Vibrational Spectroscopy, 48(1), 12-15. https://dx.doi.org/10.1016/j.vibspec.2007.12.014

MLA:
Schulte, Alfons, et al. "Low-frequency vibrational excitations in a niobium-phosphate glass for Raman gain applications." Vibrational Spectroscopy 48.1 (2008): 12-15.

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Zuletzt aktualisiert 2018-06-08 um 20:12