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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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Jarvis, Ruth A.
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Publications (3/3 displayed)
- 2007Optical properties and structural correlations of GeAsSe chalcogenide glassescitations
- 2006Optical characterization of Ge-As-Se glasses containing high content of germaniumcitations
- 2005Wavelength dispersion of Verdet constants in chalcogenide glasses for magneto-optical waveguide devicescitations
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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>