Luminescence Features of Silver Nanoparticles Sensitized Samarium Doped Boro-Zinc Tellurite Glasses

Abstract:

Spectral features modification of rare earth (RE) doped tellurite glasses via controlled manipulation of metallic nanoparticles (NPs) is the current challenge in achieving enhanced lasing action. Triggering the localized surface plasmon resonance (SPR) of NPs in the glass generates tremendous applied interests especially in solid state lasers and nanophotonics. Despite several promising features of RE doped zinc-boro-tellurite glass, the low absorption and emission cross-section of RE ions prohibit them from fabricating efficient lasers. This drawback needed to overcome and significant enhancement of spectral features is required. Co-doping by rare earths and/or embedding metallic NPs (acts as sensitizer) are demonstrated to be the alternative route to surmount such shortcomings. Series of glass samples with composition 74TeO₂–15B₂O₃–10ZnO– 1Sm₂O₃ – (x)Ag, where 0 ≤ x ≤ 0.1 mol% (in excess) are prepared using melt quenching method and the impacts of silver (Ag) NPs concentrations in altering their photoluminescence properties are inspected. The XRD spectra confirmed the amorphous nature of prepared glasses and the presence of Ag NPs are evidenced in EDX spectra. TEM micrographs revealed the distribution of Ag NPs with average size 7.2 nm. Absorption spectra revealed eight bands which most intense between ⁶F_11/2 and ⁶F1_/2. Photoluminescence spectra exhibited three prominent peaks corresponding to the transition from the excited state ⁴G_5/2 to ⁶H_5/2, ⁶H_7/2, and ⁶H_9/2 states, respectively. Our observation may be useful for the development of tellurite glass based nanophotonic devices.

• Periodical: Materials Science Forum (Volume 846)
• Pages: 96-101
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.846.96
• Online since: March 2016
• Authors: Sib Krishna Ghoshal, Masni Shafie@Haron, M.R. Sahar
• Keywords: Luminescence, Melt Quenching, Nanoparticles, Surface Plasmon Resonance

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