Femtosecond laser-induced spatial redistribution of silver species (ions, clusters, and hole centers) in a silver-containing phosphate glass is investigated by correlative means of near-field scanning optical microscopy (NSOM) images, numerical simulations, chemical micro-probe analysis, and nanoscale spatial profiles after soft etching. In particular, we found that the chemical etching selectivity for nanoscale patterning is strongly dependent upon the irradiation of femtosecond laser due to the spatial redistribution of silver species within the affected area. These results strongly indicate that controlling the distribution of silver species by femtosecond laser irradiation may open new routes for surface nanoscale chemical and/or spatial patterning for the fabrication of 2D surface photonic crystals.
Bibliographical noteFunding Information:
This study has been carried out with financial support from the French State, with French National Research Agency (ANR) in the frame of “the investments for the future” Programme IdEx Bordeaux – LAPHIA (ANR-10-IDEX-03-02), Grand Équipement National pour le Calcul Intensif (GENCI) (A0030506129), and by the BK21 PLUS program through the National Research Foundation (NRF) funded by the Ministry of Education of Korea.
© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics