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Low-frequency vibrational excitations in a niobium–phosphate glass for Raman gain applications
| hal.structure.identifier | Department of Physics | |
| hal.structure.identifier | The College of Optics and Photonics [Orlando] [CREOL] | |
| dc.contributor.author | SCHULTE, A. | |
| hal.structure.identifier | Department of Physics | |
| hal.structure.identifier | The College of Optics and Photonics [Orlando] [CREOL] | |
| dc.contributor.author | GUO, Yu | |
| hal.structure.identifier | Physikdepartment E13 | |
| dc.contributor.author | SCHIRMACHER, W. | |
| hal.structure.identifier | Forschungsneutronenquelle Heinz Maier-Leibnitz FRM II | |
| dc.contributor.author | UNRUH, T. | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | CARDINAL, Thierry | |
| dc.date.issued | 2008 | |
| dc.identifier.issn | 0924-2031 | |
| dc.description.abstractEn | 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 40Nb2O5–60NaPO3 using the time-of-flight spectrometer (TOFTOF) 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. | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.subject.en | Raman spectroscopy | |
| dc.subject.en | Boson peak | |
| dc.subject.en | Raman gain | |
| dc.subject.en | Neutron scattering | |
| dc.title.en | Low-frequency vibrational excitations in a niobium–phosphate glass for Raman gain applications | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1016/j.vibspec.2007.12.014 | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | Vibrational Spectroscopy | |
| bordeaux.page | 12-15 | |
| bordeaux.volume | 48 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-00324974 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-00324974v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Vibrational%20Spectroscopy&rft.date=2008&rft.volume=48&rft.issue=1&rft.spage=12-15&rft.epage=12-15&rft.eissn=0924-2031&rft.issn=0924-2031&rft.au=SCHULTE,%20A.&GUO,%20Yu&SCHIRMACHER,%20W.&UNRUH,%20T.&CARDINAL,%20Thierry&rft.genre=article |
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