YAO, Heng; ZAITER, Rayan; CAVILLON, Maxime; SAPALY, Benjamin; CALZAVARA, Florian; DELULLIER, Pierre; CARDINAL, Thierry; DAI, Ye; POUMELLEC, Bertrand; LANCRY, Matthieu

doi:10.1016/j.ceramint.2021.08.333

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YAO, Heng
Department of Physics, Shanghai University, 200444 Shanghai, People's Republic of China
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]

ZAITER, Rayan
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

CAVILLON, Maxime
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]

Langue

Article de revue

Ce document a été publié dans

Ceramics International. 2021-12-15, vol. 47, n° 24, p. 34235-34241

Elsevier

Résumé en anglais

Barium germano-gallate glasses are attractive glass hosts for photonic applications in the mid-infrared region up to 6 µm. In this work, we investigate the photosensitivity of such glasses under femtosecond laser, with an emphasize on the formation of refractive index changes. Six glasses with varying compositions (including addition of K, Na, Y, and La) were studied. We observed several transformation regimes in the pulse energyrepetition rate landscape: Type I (isotropic refractive index change) and a spatial broadening regime with a phase shift Δφ > 2π rad at 550 nm. This translates into refractive index changes Δn > 10-2 and is comparable to values obtained in most chalcogenide glasses. The effect of glass composition on Δφ appears correlated to the number of non-bridging oxygen presented in the glass and is brought to evidence by monitoring the Cations/GaO3/2 ratio. This provides a way to design a range of germano-gallate glasses suitable to imprinting high refractive index contrast.< Réduire

Mots clés en anglais

Barium germano-gallate glass

K/Na/Y/La doping

Femtosecond laser

Refractive index change

DOI

http://dx.doi.org/10.1016/j.ceramint.2021.08.333

Project ANR

Fabrication 3D de composants optiques intégrés à bas cout par laser femtoseconde pour des applications IR - ANR-18-CE08-0004

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026