Metallic-like photoluminescence and absorption in fused silica surface flaws

Using high-sensitivity confocal time-resolved photoluminescence (PL) techniques, we report an ultrafast PL (40 ps–5 ns) from impurity-free surface flaws on fused silica, including polished, indented, or fractured surfaces of fused silica, and from laser-heated evaporation pits. This PL is excited by...

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Bibliographic Details
Published in:Applied physics letters 2009-04, Vol.94 (15)
Main Authors: Laurence, Ted A., Bude, Jeff D., Shen, Nan, Feldman, Theodore, Miller, Philip E., Steele, William A., Suratwala, Tayyab
Format: Article
Language:English
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Summary:Using high-sensitivity confocal time-resolved photoluminescence (PL) techniques, we report an ultrafast PL (40 ps–5 ns) from impurity-free surface flaws on fused silica, including polished, indented, or fractured surfaces of fused silica, and from laser-heated evaporation pits. This PL is excited by the single-photon absorption of sub-band gap light, and is especially bright in fractures. Regions which exhibit this PL are strongly absorptive well below the band gap, as evidenced by a propensity to damage with 3.5 eV nanosecond-scale laser pulses.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3119622