Full text loading...
Fs-laser pulse irradiated (scanned) areas on the potassium magnesium silicate glass sample for XANES K-edge investigations; schematically (left) and SFM topography of selected surface areas (right). The area marked in red in the left scheme in (b) illustrates the size of the probing XANES spot. Irradiation conditions: d x = 12.5 µm, d y = 16 µm, w 0 = 16.5 µm; D Mod = 11 µm (b) and D Mod = 22 µm (c), respectively.
XANES (absorption) spectra of potassium magnesium silicate glass modified by fs-laser pulse irradiation at different peak fluences between F 0 = 0 J/cm2 (Reference) and F 0 = 5.2 J/cm2. For better visibility, the different spectra (normalized to unity at 1332.3 eV) are vertically shifted by 0.2. The results of least-squares fits to the data are shown as solid lines. As an example, the deconvolution of the reference spectrum into five individual peaks is shown as dashed curves.
Magnesium K-edge position of fs-laser irradiated potassium magnesium silicate glass as a function of the peak laser fluence. The dotted line represents a least-squares-fit of the XANES data to a model considering the (fluence dependent) weighting of the non-modified irradiated area.
Compilation of the center position of peak A and the peak area ratios A/B and C/B for different peak fluences, all obtained from least-squares-fit based deconvolution of the experimental XANES spectra.
Article metrics loading...