期刊
APPLIED PHYSICS LETTERS
卷 94, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3070522
关键词
high-speed optical techniques; laser beam effects; refractive index; shock waves; silicon compounds; voids (solid)
资金
- DFG
- PICS
- ANR programs
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.
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