Femtosecond laser structuring of silver-containing glass: Silver redistribution, selective etching, and surface topology engineering

Femtosecond direct laser writing in silver-containing phosphate glasses allows for the three-dimensional (3D) implementation of complex photonic structures. Sample translation along or perpendicular to the direction of the beam propagation has been performed, which led to the permanent formation of...

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Bibliographic Details
Published in:Journal of applied physics 2015-12, Vol.118 (21)
Main Authors: Desmoulin, Jean-Charles, Petit, Yannick, Canioni, Lionel, Dussauze, Marc, Lahaye, Michel, Gonzalez, Hernando Magallanes, Brasselet, Etienne, Cardinal, Thierry
Format: Article
Language:English
Subjects:
Applied physics
Beams (radiation)
Chemical etching
Chemical Sciences
CHEMISTRY
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Clusters
DEPTH
Direct laser writing
ETCHING
FLUORESCENCE
Glass
LASER RADIATION
Lasers
Luminescence
Material chemistry
MATERIALS SCIENCE
MULTI-PHOTON PROCESSES
Optical properties
Organic chemistry
OXIDATION
PHOSPHATE GLASS
PHOTOLUMINESCENCE
Photonics
REDUCTION
Selective surfaces
SILVER
SPATIAL DISTRIBUTION
SURFACES
THREE-DIMENSIONAL CALCULATIONS
TOPOLOGY
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Summary:Femtosecond direct laser writing in silver-containing phosphate glasses allows for the three-dimensional (3D) implementation of complex photonic structures. Sample translation along or perpendicular to the direction of the beam propagation has been performed, which led to the permanent formation of fluorescent structures, either corresponding to a tubular shape or to two parallel planes at the vicinity of the interaction voxel, respectively. These optical features are related to significant modifications of the local material chemistry. Indeed, silver depletion areas with a diameter below 200 nm were evidenced at the center of the photo-produced structures while photo-produced luminescence properties are attributed to the formation of silver clusters around the multiphoton interaction voxel. The laser-triggered oxidation-reduction processes and the associated photo-induced silver redistribution are proposed to be at the origin of the observed original 3D luminescent structures. Thanks to such material structuring, surface engineering has been also demonstrated. Selective surface chemical etching of the glass has been obtained subsequently to laser writing at the location of the photo-produced structures, revealing features with nanometric depth profiles and radial dimensions strongly related to the spatial distributions of the silver clusters.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.4936233