Abstract
Using in situ Raman scattering in a confocal microscopy setup, we have observed changes in the network structure of fused silica after modifying regions inside the glass with tightly focused 800-nm 130-fs laser pulses at fluences of 5-200 J cm-2. The Raman spectra show a large increase in the peaks at 490 and 605 cm-1, owing to 4- and 3-membered ring structures in the silica network, indicating that densification occurs after exposure to the femtosecond laser pulses. The results are consistent with the formation of a localized plasma by the laser pulse and a subsequent microexplosion inside the glass.
Original language | English (US) |
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Pages (from-to) | 1726-1728 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 26 |
Issue number | 21 |
State | Published - Nov 1 2001 |
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics