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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ohishi, Y.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2019Ultrahigh-pressure form of Si O2 glass with dense pyrite-type crystalline homologycitations
- 2016Filamentation-induced spectral broadening and pulse shortening of infrared pulses in Tellurite glasscitations
- 2014Waveguides in Ni-doped glass and glass-ceramic written with a 1 kHz femtosecond lasercitations
- 2013On the analogy between photoluminescence and carrier-type reversal in Bi- and Pb-doped glassescitations
- 2012Investigation of Erbium-doped tellurite glasses for a planar waveguide power amplifier at 1.57 microns
- 2012Direct laser writing of relief diffraction gratings into a bulk chalcogenide glasscitations
- 2012Er-doped Tellurite glasses for planar waveguide power amplifier with extended gain bandwidthcitations
- 2010The efficiencies of energy transfer from Cr to Nd ions in silicate glassescitations
- 2009Ultrabroad emission from a bismuth doped chalcogenide glasscitations
- 2005Raman spectroscopic studies of quaternary tellurite glasses containing Nb2O5 and Ta2O5
Places of action
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article
Raman spectroscopic studies of quaternary tellurite glasses containing Nb2O5 and Ta2O5
Abstract
New quaternary glasses in the systems TeO<sub>2</sub>–BaO–SrO–Nb<sub>2</sub>O<sub>5</sub> and TeO<sub>2</sub>–BaO–SrO–Ta<sub>2</sub>O<sub>5</sub> are prepared, and are found to have improved thermal stabilities and refractive indices, making them suitable for photonics device applications. Systematic Raman spectroscopic studies of these glasses are undertaken to unravel the presence of various structural units, and the contributions made by them with varying modifier oxides contents have been quantified. A comparative study is made on the evolution of various structural units with the addition of modifier oxides in the two glass systems. The Raman bandwidths of these glasses are broader compared to conventional tellurite glasses. Both glass systems show an additional Raman band beyond 870 cm<sup>-1</sup> that is not present in other tellurite glass systems. The Nb–O related vibrational band near 870 cm<sup>-1</sup> is stronger than the band around 900 cm<sup>-1</sup> in the Ta<sub>2</sub>O<sub>5</sub> containing glasses. The coordination geometry of tellurium atoms in the presence of Nb<sub>2</sub>O<sub>5</sub> and Ta<sub>2</sub>O<sub>5</sub> is discussed with the help of molecular modelling results.