LiF films: absorption and luminescence of colour centres

LiF films 1 μm thick have been produced by thermal evaporation on amorphous silica substrates. X-ray diffraction has shown the existence of a polycrystalline structure. The films were subjected at room temperature to electron beam irradiation of energy 3 keV and current 120 μA on anea of about 0.5 c...

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Bibliographic Details
Published in:Thin solid films 1991-10, Vol.205 (1), p.106-108
Main Authors: Montereali, Rosa Maria, Baldacchini, Giuseppe, Do Carmo, L.C.Scavarda
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of specific thin films
Physics
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Summary:LiF films 1 μm thick have been produced by thermal evaporation on amorphous silica substrates. X-ray diffraction has shown the existence of a polycrystalline structure. The films were subjected at room temperature to electron beam irradiation of energy 3 keV and current 120 μA on anea of about 0.5 cm 2. This irradiation produced F 2 and F 3 + centres stable at room temperature that were observed by light absorption measurements. Although the concentration of the centres was much higher than that obtained usually in bulk crystals, luminescence was also observed.
ISSN:0040-6090
1879-2731
DOI:10.1016/0040-6090(91)90479-H