Structural changes in fused silica after exposure to focused femtosecond laser pulses

James W Chan, Thomas R Huser, S. Risbud, D. M. Krol

Research output: Contribution to journalArticle

352 Scopus citations

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 languageEnglish (US)
Pages (from-to)1726-1728
Number of pages3
JournalOptics Letters
Volume26
Issue number21
StatePublished - Nov 1 2001

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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