Nanobismuth enhanced plasmonic, emission and Faraday rotation properties of diamagnetic tellurite glasses

Bismuth has played important roles in metal and condensed matter physics. This paper reports the influence of Bi nanoparticle to diamagnetic tellurite glass-forming, structure, spectra andproperties. 30 nm hexagonal pure Bi nanoparticles (NPs) presented an obvious SPR effect around 275 nm, broad emission FWHM (200 nm) and superparamagnetic behavior. Successfully incorporated of nanobismuth (<5%) into glass and the BiNPs modifications on TeO4, TeO3 and NBOs structure has been confirmed through FT-IR, Raman spectra, DSC and Urbach energy measurement. UV-visible spectra showed SPR peak of BiNPs at 508 (glass) and 700 nm (metal-glass) with gradually increased intensities and gradually broadened cross-sections with doping amount. The visible and infrared luminescence show characteristic emission of BiNPs at 460 nm, 730 nm, 910 nm and 1150 nm respectively. All samples exhibited diamagnetic property and the magnetization increased with the doping amount due to the diamagnetic nature of host and dopant. The increased polarizability and intense SPR effect enhanced Faraday rotation and a large Verdet constant (0.1828 min/G.cm) at 633 nm was obtained for 5%BiNPs doped glass which also exhibited large thermal stability and good luminescence performance. (C) 2020 Elsevier B.V. All rights reserved.