Enhancement of nanograting formation assisted by silver ions in a sodium gallophosphate glass

Marie Vangheluwe (1, 2) , Feng Liang (1) , Yannick Petit (2, 3) , Patricia Hée (1, 3) , Yannick Ledemi (1) , Sébastien Thomas (3) , Evelyne Fargin (3) , Thierry Cardinal (3) , Younes Messaddeq (1) , Lionel Canioni (2) , Réal Vallée (1)

1 Centre d’Optique, Photonique et Laser
2 LOMA - Laboratoire Ondes et Matière d'Aquitaine
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

We investigated the influence of silver ions during the direct femtosecond laser-induced formation of nanogratings (NGs) at the surface of a tailored sodium gallophosphate glass. We observed that the silver ions had a remarkable influence because the silver-containing glass showed (1) lower fluence thresholds for the formation of the NGs; (2) much smoother NG shapes; and (3) a bifunctional behavior because fluorescence from laser-induced silver clusters occurs prior to the formation of the NGs. We demonstrate for the first time, to our knowledge, the formation of NGs assisted by noble metal ions, such as ions playing a kind of catalytic-like role that enhances and improves the NG formation and its incubation process. Our innovative approach provides promising potential for further improvements in processes for NG formation.

Mots clés: Lasers; Materials; Nonlinear optics; Thin films; Fluorescent and luminescent materials; Laser materials processing; Laser-induced chemistry; Multiphoton processes; Subwavelength structures and nanostructures

Domaines: Matériaux

Marie Vangheluwe, Feng Liang, Yannick Petit, Patricia Hée, Yannick Ledemi, et al.. Enhancement of nanograting formation assisted by silver ions in a sodium gallophosphate glass. Optics Letters, 2014, 39 (19), pp.5491-5494. ⟨10.1364/OL.39.005491⟩. ⟨hal-01074507⟩