Journal
OPTICAL MATERIALS EXPRESS
Volume 3, Issue 6, Pages 755-764Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.3.000755
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Funding
- German Science Foundation (DFG) [EB 248/4-2, EI 110/30-2]
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The effects of single femtosecond laser pulse irradiation (130 fs pulse duration, 800 nm center wavelength) on the structure of binary lithium silicate glasses of varying chemical compositions were investigated by micro-Raman spectroscopy. Permanent modifications were generated at the surface of the glass samples with varying laser fluences in the ablative regime and evaluated for changes in the corresponding Raman band positions and bandwidths. For increasing laser fluences, the position of certain Raman bands changed, indicating an increase in the mass density of the glass inside the irradiated area. Simultaneously, the widths of all investigated bands increased, indicating a higher degree of disorder in the glass structure with respect to bond-angle and bond-length variations. (C) 2013 Optical Society of America
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