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We report large photoluminescence (PL) enhancement in Eu3+-doped GeO2–Bi2O3 glasses containing gold nanoparticles (NPs). Growth of ≈1000% in the PL intensity corresponding to the Eu3+ transition D50→F72, at 614 nm, was observed in comparison with a reference sample that does not contain gold NPs. Other PL bands from 580 to 700 nm are also enhanced. The enhancement of the PL intensity is attributed to the increased local field in the Eu3+ locations due to the presence of the NPs and the energy transfer from the excited NPs to the Eu3+ ions.
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Kassab et al. (2009) studied this question.
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