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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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Smith, Anita
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Topics
Publications (6/6 displayed)
- 2014Relative contribution of stoichiometry and mean coordination to the fragility of Ge-As-Se glass forming liquidscitations
- 2011Structure and physical properties of Gex Asy Se 1-x-y glasses with the same mean coordination number of 2.5citations
- 2008Properties of GexAsySe1-x-y glasses for all-optical signal processingcitations
- 2007Properties and structure of Ag-doped As2Se3 glassescitations
- 2007Optical properties and structural correlations of GeAsSe chalcogenide glassescitations
- 2006Optical characterization of Ge-As-Se glasses containing high content of germaniumcitations
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article
Optical properties and structural correlations of GeAsSe chalcogenide glasses
Abstract
<p>Ge <sub>x</sub>As <sub>y</sub>Se <sub>100-x-y</sub> (33 ≤ x ≤ 39 and 12 ≤ y ≤ 16) glasses were prepared, and their structure and optical properties were studied by Raman and UV-Vis-IR spectroscopic techniques. Ge-tetrahedrons [GeSe <sub>4</sub>] dominated in the structural units, and 'defect' bonds, such as Ge-Ge, Ge-As and As-As bonds, also occurred in the glasses. A structural model for calculation of the optical band gap energy (E <sub>g</sub>) of Ge-As-Se glasses was proposed, and the calculated values are consistent with experimental results. Increasing germanium and decreasing selenium content can reduce both the mean bond energies and optical band gap energies, enhancing the photo-sensitivity of the glasses.</p>