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Structural modifications of binary lithium silicate glasses upon femtosecond laser pulse irradiation probed by micro-Raman spectroscopy
Author(s) -
Thomas Seuthe,
Moritz Grehn,
Alexandre Mermillod–Blondin,
Hans Joachim Eichler,
Jörn Bonse,
Markus Eberstein
Publication year - 2013
Publication title -
optical materials express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 66
ISSN - 2159-3930
DOI - 10.1364/ome.3.000755
Subject(s) - materials science , femtosecond , raman spectroscopy , irradiation , laser , spectroscopy , optics , lithium (medication) , laser induced breakdown spectroscopy , optoelectronics , silicate , silicate glass , chemical engineering , physics , quantum mechanics , nuclear physics , medicine , engineering , composite material , endocrinology
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

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