Dynamics of femtosecond laser induced voidlike structures in fused silica

Mermillod-Blondin, A.; Bonse, J.; Rosenfeld, A.; Hertel, I. V.; Meshcheryakov, Yu. P.; Bulgakova, N. M.; Audouard, E.; Stoian, R.
January 2009
Applied Physics Letters;1/26/2009, Vol. 94 Issue 4, pN.PAG
Academic Journal
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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