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- W3100288091 abstract "Prior studies have shown that photoluminescence from Er3+ impurities in silicon is severely limited at room temperature by non-radiative relaxation and solid solubility, and room temperature emission from Er3+ in oxide-based hosts becomes diminished at high erbium concentrations. This work presents studies of thin films (0·2 µm thick) prepared by vacuum co-evaporation from elemental sources (erbium, silicon and silicon/germanium) followed by vacuum annealing (600°C); materials of this type, which are produced with high Er3+ concentrations, are shown to be capable of yielding strong room temperature photoluminescence. Alloy films of Si–Er–O and Si–Ge–Er–O, containing (20 ± 2) at.% erbium and incorporating (16 ± 2) at.% oxygen (introduced by way of vacuum scavenging reactions), exhibit emission bands with dominant components at 1·51 and 1·54 µm (~0·04-µm overall spectral widths). Results are discussed in terms of erbium–oxygen complex formation and the effects of local randomness on cooperative inter-Er3+ energy transfer among thermal-broadened and local-field Stark-split 4I13/2→4I15/2 transitions. This paper discusses the advantages of scalability and low costs associated with producing optically active silicon-based materials." @default.
- W3100288091 created "2020-11-23" @default.
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- W3100288091 date "2012-02-01" @default.
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- W3100288091 title "Ambient erbium luminescence in silicon and silicon-germanium films" @default.
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- W3100288091 doi "https://doi.org/10.1680/emr.11.00002" @default.
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