Tailoring Spectroscopic Properties of Er3+ Doped Zinc Sodium Tellurite Glass via Gold Nanoparticles

Diterbitkan: Rabu, 22 Jun 2016

Tailoring Spectroscopic Properties of Er3+ Doped Zinc  Sodium  Tellurite  Glass  via  Gold Nanoparticles

Asmahani Awanga, S.K. Ghoshalb*, M.R. Saharb, R. Arifinb

aPhysics with Electronics Program, Faculty of Science and Natural Resources, Universiti Malaysia Sabah, 88400 Kota Kinabalu, Sabah, Malaysia.

bAdvanced Optical Materials Research Group, Department of Physics, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.

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Tailoring the spectroscopic properties of rare earth (RE) doped inorganic glasses mediated via surface plasmon resonance (SPR) by embedding metallic nanoparticles (NPs) with controlled concentration is prerequisite for photonic applications.  Erbium (Er3+) doped tellurite glasses containing gold (Au) NPs are prepared and systematic characterizations are made to inspect the impacts of Au NPs of spectral features for desired tailoring. X-ray diffraction pattern confirm the amorphous nature of the glass samples and EDX analysis detects elemental traces.  The UV-Vis spectra exhibit six absorption bands centered at 488, 523, 655, 800, 973 and 1533 nm corresponding to 4f-4f transitions of Er3+ ions. Glass sample containing 0.4 mol% Au (without Er2O3) reveals Au plasmon band at around 629 nm. The EDX spectra display elemental traces of Te, Er, Zn, Na and Au. Glass sample containing  0.2  mol%  Au  demonstrates  maximum enhancement  in  the  emission  band  intensity  by  a  factor of 20.23 (orange), 18.35 (strong  green), 16.80 (moderate  green) and 15.46 (blue).  The enhancement is attributed to the Au NPs assisted SPR effect. The beneficial features of proposed glasses nominate them as potential candidate for photonic devices and solid state lasers.

  • TEM image of the Au NPs (glass containing 0.4ml%Au)showcloselydispersedparticles,majoritywith non-sphericalshape.InsetshowshistogramofAuNPswith average diameter of ≈ 9 nm (b) Luminescence spectra for all samples under 350 nm excitations

Paper has been published in Jurnal Teknologi

78: 3–2 (2016) 139–144

Funded by SGPUMS (Vote SGK0008-SG-2015) and RAG0067-SG-2015