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- W2803550689 abstract "The frequency upconversion emission in Er3+ doped TeO2-WO3-Li2O containing Ag nanoparticle (TWLEOAG) glasses at 980nm excitation is reported. The absorption spectra reveal not only the peaks due to Er3+ ions, but also the surface plasmon resonance band of silver NPs located around 525nm and 650 nm. The spherical AgNPs with average size ∼38 nm in the glassy matrix is evidenced from the TEM measurement. Under 980nm laser excitation upconversion emission spectra show two major emission at 550nm and 638nm originating from 4S3/2 and 4F9/2 energy levels of the Er3+ ions, respectively was observed. Upconversion emission enhancement factor ~7 fold has been measured for sample heat treated during 40h. However for 18h heat treated TWLEOAG sample under 980 nm flash lamp excitation produced Intense green compare to red emission. Since the 980nm frequency is far from the AgNPs surface plasmon resonance frequency, visible emission ehancement is attributed to local field increase in proximity of the Ag NPs and not energy tranfer from NPs to emitters. Possible energy transfer upconversion mechanism has been also discussed." @default.
- W2803550689 created "2018-06-01" @default.
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- W2803550689 date "2018-01-01" @default.
- W2803550689 modified "2023-09-26" @default.
- W2803550689 title "Frequency upconversion in Er3+ doped tungsten tellurite glass containing Ag nanoparticles" @default.
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- W2803550689 doi "https://doi.org/10.1063/1.5038701" @default.
- W2803550689 hasPublicationYear "2018" @default.
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