White light emission from transparent SiO2 glass prepared from nanometer-sized silica particles
- 16 August 2004
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 85 (7), 1164-1166
- https://doi.org/10.1063/1.1782263
Abstract
We report that nanometer-sized silicon-dioxide particles are sintered to optical transparency at temperatures even below , forming nonporous bulk silica glass. The resultant silica glass exhibits visible emission, which appears white to the naked eye, in the wavelength range from at room temperature under ultraviolet excitation. The observed emission is quite stable after prolonged exposure to the atmosphere and shows no appreciable light-induced degradation. The present photoluminescence characteristics are found to be basically different from those reported previously for silica nanoparticles and silica-based porous materials.
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