Formation of nanogratings driven by ultrafast laser irradiation in mid-IR heavy oxide glasses
YAO, Heng
Department of Physics [Shanghai]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
See more >
Department of Physics [Shanghai]
Institut de Chimie Moléculaire et des Matériaux d'Orsay [ICMMO]
Language
en
Article de revue
This item was published in
Ceramics International. 2022, vol. 48, n° 21, p. 31363-31369
Elsevier
English Abstract
This work demonstrates for the first time the formation of nanogratings inside Barium Gallo-Germanate (BGG) glasses using femtosecond laser direct writing. These heavy oxide glasses, with a characterized transparency window ...Read more >
This work demonstrates for the first time the formation of nanogratings inside Barium Gallo-Germanate (BGG) glasses using femtosecond laser direct writing. These heavy oxide glasses, with a characterized transparency window up to 6 m, along with the polarization sensitive birefringent nanostructures induced by femtosecond laser, offer an excellent platform for the development of mid-Infrared photonic applications. The fabricated glasses, containing both rare earth elements (Gd, Y) and transition metals (Zn, Ta), are directly compared to amorphous GeO2 and commercial alumino-germanate (Corning-9754) glasses commonly used in this field. The nanogratings processing window in each glass was investigated by varying laser parameters (pulse duration, energy, repetition rate), and electron microscopy imaging directly evidenced the porous nanostructures. Among the results, a strong form birefringence in 8% ZnO containing BGG glass, e.g., up to −0.029 ± 0.001, was reported. Finally, birefringent embedded Fresnel GRIN plates were directly written in a BGG glass, to demonstrate the functionalization potential of these materials.Read less <
English Keywords
Femtosecond laser
Barium gallo-germanate glass
Nanogratings
Birefringence
Photonic applications
ANR Project
Fabrication 3D de composants optiques intégrés à bas cout par laser femtoseconde pour des applications IR - ANR-18-CE08-0004
Origin
Hal imported