Photoluminescence from germanate glasses containing silicon nanocrystals and erbium ions
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Applied Physics B
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2012-08-01
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da Silva, D.S., Naranjo, L.P., Kassab, L.R.P. et al. Photoluminescence from germanate glasses containing silicon nanocrystals and erbium ions. Appl. Phys. B 106, 1015–1018 (2012).
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We report the first observation of photolumines-cence enhancement in Er 3+ doped GeO 2-Bi 2O 3 glasses containing silicon nanocrystals (Si-NCs) excited by a laser operating at 980 nm. The growth of ≈ 200% in the intensity of the Er 3+ transition 4S 3/2 → 4I 15/2 (545 nm) and of ≈ 100% for transitions 2H 11/2 → 4I 15/2 (525 nm), 4F 9/2 → 4I 15/2 (660 nm), and 4I 5/2 → 4I 13/2 (1530 nm) was observed in comparison with a reference sample that does not contain Si-NCs. The results open a new road for obtaining efficient Stokes and anti-Stokes emissions in germanate composites doped with rare-earth ions.
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0946-2171