Fig. 1. Photographs of Ag+-doped silicate glasses with a rectangular region processed by a picosecond laser at an average power of 1.1 W and a scanning speed of 200 µm/s.

Fig. 2. Ag atoms dissolve in the glass network by breaking the Sb-O-Sb bond.

Fig. 3. Absorption spectra of five glass samples (a) before and (b) after picosecond laser irradiation; (c) difference absorbance after picosecond laser irradiation.

Fig. 4. (a) Experimental difference spectrum and theoretical fitting curve of Ag nanoparticle SPR of S5; (b) TEM image of Ag nanoparticles precipitated in the laser-irradiated zone of S5.

Fig. 5. Optical micrographs of scanned lines by picosecond laser pulses at different processing speeds of 16, 32, 64,…, 1024 µm/s. The inset shows the color comparison of the laser fabricated region in S5 at speeds of 200 and 1000 µm/s.

Fig. 6. (a) Normalized Z-scan transmittance of S5 at I₀=4.22TW/cm2; (b) the dependence of Z-scan valley transmittance on incident laser intensity I₀.