Titanium nitride nanoparticles as plasmonic alternatives to gold and silver: Enhancing luminescence and Judd-Ofelt parameters in Tm3+/Nd3+ doped oxyfluorotellurite glass

The low emission cross-section of Tm3+/Nd3+ doped tellurite glass limits their potential in solid-state lasers and fibre optic applications. Here, the tellurite glass composition has been carefully tailored by embedding new potential plasmonic material; titanium nitride nanoparticles (TiN NPs) with different concentrations from 0.0 to 0.5 mol%. Eight distinct absorption bands were evidenced, with notable bands at 467, 526, 583, 687, 794, 877, 1212, and 1691 nm. These correspond to respective transitions of Nd3+ and Tm3+ ions from ground to excited states. The luminescence spectra revealed six bands, with a prominent peak at 650 nm associated with the 1D2→3F2 transition of Tm3+ ions. The Judd-Ofelt analysis yielded parameters in the range of Ω2 (2.98–3.91) × 10−20 cm2, Ω4 (0.74–1.24) × 10−20 cm2, and Ω6 (0.47–0.85) × 10−20 cm2. The spectroscopic quality factors ranged from 0.78 to 2.62. Radiative properties are calculated: Arad (21.61–31.86) s−1, τrad (2.01–2.38) ms and stimulated emission cross-sections (0.01–0.02 × 10−20 cm2). TiN NPs significantly enhanced the red emission of Tm3+ ions attributed to their localised surface plasmon resonance (LSPR) around 607–622 nm. This highlights the potential of TiN NPs as an alternative sensitiser to silver and gold nanoparticles (NPs) to enhance the emission of Tm3+/Nd3+ doped glass for solid-state laser application operating in the red region.

Text 124153.pdf - Published Version Restricted to Repository staff only Download (24MB) Official URL or Download Paper: https://www.sciencedirect.com/science/article/pii/...

Actions (login required)

View Item