Abnormal elemental redistribution in silicate glasses irradiated by ultrafast laser

We report on an abnormal element distribution in silicate glass, induced by 300 kHz, 1030 nm fs laser irradiation. Chemical analysis has taken on the cross section of the laser tracks and also along the writing direction. Energy-dispersive X-ray, wavelength-dispersive spectroscopy and nuclear microprobe demonstrates that no elemental migration occurred after femtosecond laser irradiation, which is quite different from the previous results. The possible mechanism is also briefly discussed.