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Article Dans Une Revue Optics Express Année : 2023

Volume nanogratings inscribed by ultrafast IR laser in alumino-borosilicate glasses

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Self-assembled nanogratings, inscribed by femtosecond laser writing in volume, are demonstrated in multicomponent alkali and alkaline earth containing alumino-borosilicate glasses. The laser beam pulse duration, pulse energy, and polarization, were varied to probe the nanogratings existence as a function of laser parameters. Moreover, laser-polarization dependent form birefringence, characteristic of nanogratings, was monitored through retardance measurements using polarized light microscopy. Glass composition was found to drastically impact the formation of nanogratings. For a sodium alumino-borosilicate glass, a maximum retardance of 168 nm (at 800 fs and 1000 nJ) could be measured. The effect of composition is discussed based on SiO 2 content, B 2 O 3 /Al 2 O 3 ratio, and the Type II processing window is found to decrease as both (Na 2 O + CaO)/Al 2 O 3 and B 2 O 3 /Al 2 O 3 ratios increase. Finally, an interpretation in the ability to form nanogratings from a glass viscosity viewpoint, and its dependency with respect to the temperature, is demonstrated. This work is brought into comparison with previously published data on commercial glasses, which further indicates the strong link between nanogratings formation, glass chemistry, and viscosity.
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hal-04264004 , version 1 (18-12-2023)

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Heng Yao, Qiong Xie, Maxime Cavillon, Daniel R. Neuville, Diego Pugliese, et al.. Volume nanogratings inscribed by ultrafast IR laser in alumino-borosilicate glasses. Optics Express, 2023, 31 (10), pp.15449. ⟨10.1364/OE.488249⟩. ⟨hal-04264004⟩
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