Enhanced green emission of terbium-ions-doped phosphate glass embedding metallic nanoparticles

Mohammad Reza Dousti; Raja Junaid Amjad

doi:10.1117/1.JNP.9.093068

25 June 2015 Enhanced green emission of terbium-ions-doped phosphate glass embedding metallic nanoparticles

Mohammad Reza Dousti, Raja Junaid Amjad

Author Affiliations +

Journal of Nanophotonics, Vol. 9, Issue 1, 093068 (June 2015). https://doi.org/10.1117/1.JNP.9.093068

Abstract

Tb³⁺-doped glasses are promising materials for green lasers working at a UV-excitation light. It is essential to find a commercially low-cost host with high quantum efficiency in the visible region. We report the preparation and optical characterization of a thermally stable and optically transparent phosphate glass containing silver nanoparticles with nominal composition 57P₂O₅-40(ZnO-PbO)-2Tb₂O₃-1AgNO₃ (mol%) obtained by a melt-quenching technique and subsequent heat-treatments. The glasses are transparent in UV to near-infrared region and are not hygroscopic at ambient environment. The optical absorption and luminescence excitation spectra of the samples with and without silver nanoparticles are identical, and no sign of any silver species is revealed, while the luminescence spectrum is enhanced up to 1.7 times after heat-treating the samples for 15 h. The transmission electron microscopy and selected area diffraction pattern of glasses show the presence of silver nanoparticles with an average size of ∼15 nm and growth at [200] crystallographic direction. The lifetime of the ⁵D₄ state of Tb³⁺ ions decreases from 3.06 to 2.85 ms by increasing the heat-treatment duration, which is indicative of the plasmonic effect of nanoparticles on the radiative rates of Tb³⁺-doped glasses.

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Mohammad Reza Dousti and Raja Junaid Amjad "Enhanced green emission of terbium-ions-doped phosphate glass embedding metallic nanoparticles," Journal of Nanophotonics 9(1), 093068 (25 June 2015). https://doi.org/10.1117/1.JNP.9.093068

Published: 25 June 2015

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