Molecular Dynamics Study of UV-Laser-Induced Densification of Fused Silica. II. Effects of Laser Pulse Duration, Pressure, and Temperature, and Comparison with Pressure-Induced Densification
Numerical simulations on UV-laser-induced densification of fused silica have been performed using classical molecular dynamics. The effect of laser irradiation is modeled by the energy transfer from the absorbed laser photons to the bonded silicon and oxygen atoms, i.e., the thermal effects of laser-irradiation on silica glass. Results from simulations at various laser pulse duration, pressure, and temperature conditions show that longer laser pulse duration, higher pressure, and higher temperature cause larger densification. We have also compared the microstructural and elastic properties of fused silica desndified by UV-laser and hydrostatic pressure, respectively. Similar change sare observed in both cases; several notable differences are noticed, too, and include Si-O bond length change, number of over-coordinated atoms, and ring distributions.
- Research Organization:
- Laboratory for Laser Energetics, University of Rochester, Rochester, NY
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC52-92SF19460
- OSTI ID:
- 850531
- Report Number(s):
- DOE/SF/19460-628; JNCSBJ; 1586; 2005-71; TRN: US0703432
- Journal Information:
- Journal of Non-Crystalline Solids, Vol. 351, Issue 40-42; ISSN 0022-3093
- Country of Publication:
- United States
- Language:
- English
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