Dynamics of femtosecond laser induced voidlike structures in fused silica

作者：Mermillod Blondin A^*; Bonse J; Rosenfeld A; Hertel I V; Meshcheryakov Yu P; Bulgakova N M; Audouard E; Stoian R

来源：Applied Physics Letters, 2009, 94(4): 041911.

DOI：10.1063/1.3070522

• high-speed optical techniques
• laser beam effects
• refractive index
• shock waves
• silicon compounds
• voids (solid)

Focused ultrafast laser irradiation of fused silica usually induces a spatially modulated refractive index variation in the bulk material. Strong energy concentration leads to the localized formation of a lower-density cavitylike depressed structure surrounded by compacted matter. We report on applying time-resolved phase contrast microscopy to investigate the timescale of the void formation. We indicate a temporal behavior consistent with shock wave generation and subsequent rarefaction.

• 出版日期2009-1-26