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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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Gretzinger, Thomas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (5/5 displayed)
- 2020Towards the development of mid-infrared integrated optics in the renewed context of high-contrast interferometrycitations
- 2020Boson band mappingcitations
- 2019Boson band vibrations aid refractive index mapping of waveguides in high index chalcogenide glass
- 2017Mid-infrared astrophotonicscitations
- 2015Ultrafast laser inscription in chalcogenide glasscitations
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article
Boson band mapping
Abstract
<p>The formation of femtosecond laser direct-written waveguides in gallium lanthanum sulfide (GLS) chalcogenide glass with a peak index contrast of Δn<sub>max</sub>=0.023 and an average positive refractive index change of Δn<sub>waveguide</sub>=0.0049 is explained for the first time, to the best of our knowledge. Evidence of structural change and ion migration is presented using Raman spectroscopy and electron probe microanalysis (EPMA), respectively. Raman microscopy reveals a frequency shift and a change in full-width at half maximum variation of the symmetric vibration of the GaS<sub>4</sub> tetrahedra. The boson band is successfully used to identify and understand the material densification profile in a high refractive index glass waveguide. EPMA provides evidence of ion migration due to sulfur, where the observation of an anion (S<sup>2-</sup>) migration causing material modification is reported for the first time. These results will enable optimization of future mid-infrared and nonlinear integrated optical devices in GLS glass based on femtosecond laser written waveguides.</p>