Condensation of Si-rich region inside soda-lime glass by parallel femtosecond laser irradiation

摘要: Local melting and modulation of elemental distributions can be induced inside a glass by focusing femtosecond (fs) laser pulses at high repetition rate (>100 kHz). Using only single beam fs pulses, the shape molten region is ellipsoidal, so are often circular elongate in propagation direction. In this study, we show that elongation laser-induced soda-lime could suppressed parallel fsing 250 kHz 1 pulses. The thickness Si-rich became about twice thinner than irradiation. Interestingly, position depended on relative positions between photoexcited regions. observation melt during exposure showed vortex flow occurred it formation region. Based simulation transient temperature viscosity exposure, temporally interpreted origin mechanism