Nanogratings formation in multicomponent silicate glasses
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We demonstrate the formation of porous nanogratings in various oxide glasses including TiO2-doped silica, GeO2 and alumino-borosilicate by near-IR femtosecond laser radiation. ULE and GeO2 glasses exhibit similar birefringence to pure silica, whereas Borofloat 33 reveals twice weaker amplitude. Using quantitative birefringence measurements, small-angle X-ray scattering and scanning electron microscopy, we correlate birefringence and porous nanolayers formation according to laser repetition rate and glass composition. We show that heat accumulation is a crucial parameter limiting the glass decomposition and thus nanogratings formation.
KeywordsRepetition Rate GeO2 High Repetition Rate Heat Accumulation Laser Track
This work has been performed in the framework of the FLAG (Femtosecond Laser Application in Glasses) international project with the support of FP7-PEOPLE-IRSES e-FLAG 247635, the Agence Nationale pour la Recherche (ANR-09-BLAN-0172-01). We acknowledge beamtime at the Swiss Light Source (PSI, Villigen Ch) and excellent support by M. Liebi and A. Plech (KIT). The work is supported by DFG via priority program SPP 1327 (NO 462/5-2). The research leading to these results has received funding from the European Community’s Seventh Framework Program (FP7/2007-2013) under Grant Agreement No. 312284.
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Conflict of interest
The authors declare that they have no conflict of interest.
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