Anomalous Photoluminescence Behavior and Judd –Ofelt Analysis of Erbium-Barium Borate Glass Embedded with Copper Oxide Nanoclusters

AbstractGlasses doped with rare earth elements have been extensively researched for the purpose of creating novel and effective photonic devices. The impact of the LSPR of metallic nanoparticles on rare earth –doped glass for manipulating luminescent properties is a new matter of study. As a result, the localized surface plasmon resonance (LSPR) of metallic nanoparticles (NPs) in amorphous materials may create new opportunities in the disciplines of optics and photonics. Therefore, erbium-barium borate glasses with a 60B2O3-38.5BaO-1.5Er2O3-xCu2O-xSnO (x = 0, 1, 2, 3, 4, 5 mol%) composition were synthesized by the melt quenching technique. The synthesized glasses were then preliminarily subjected to HR-TEM, X-ray diffraction (XRD), and Fourier transform infrared (FT-IR) spectroscopic analysis for structural investigation. A consistent linear t rend was observed for Cu2O concentrations from 1 to 4  mol%, but a remarkable nonlinear anomaly emerged beyond the threshold concentration of 5 mol% Cu2O. This inflection point played a pivotal role, leading to the formation of Cu0, as confirmed by LSPR in UV –visible spectroscopy, significantly impacting the glass properties. Spectroscopic attributes, including branching ratio and stimulated emission cross section, underwent notable changes, particularly at 5 mol%, showcasing enhanced branching from 13.17 to 19.20% and quantum efficiency from 28.91 t o 36%, positioning BEC5 as a promising candidate. The incorporation of cop...
Source: Plasmonics - Category: Biomedical Science Source Type: research