SPR coupled luminescence enhancement of Er3+/Au NPs -doped multicomponent tellurite glasses

• Published in: Optical materials Vol. 131; p. 112637
• Main Authors: Sajna, M.S., Sanu, M.S., Vimal, G., Prakashan, V.P., Biju, P.R., Joseph, Cyriac, Pillai, V.P. Mahadevan, Unnikrishnan, N.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2022
• Subjects: Erbium; Gold nanoparticles; Luminescence enhancement; Surface plasmon resonance; Tellurite glass; Luminescence enhancement; Tellurite glass; Surface plasmon resonance; Gold nanoparticles; Erbium
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2022.112637

Glasses of the composition (59.6-x)TeO2+10K2O+10P2O5+10B2O3 +10ZnF2+0.4Er2O3+xAu2O3 (x = 0.1, 0.2, 0.3 and 0.4 mol%) were produced by means of melt-quenching method and thoroughly analyzed using EDS, XRD, TEM, DSC, UV–Visible–NIR absorption and photoluminescence (PL) techniques. These Au incorporated glasses were investigated for their surface plasmonic resonance (SPR) coupled luminescence enhancement. The plasmonic absorptions of gold have been evidenced through the presence of absorption bands at 599 nm and 652 nm. Direct and indirect optical band gap and the urbach energies were estimated from the absorption spectra. Well dispersed nanoparticles having an average size of 10 nm was verified by TEM analysis. Plasmonic coupled enhancement in the characteristic emission of Er3+ ions and in other spectral parameters were traced and quantified. The visible as well as NIR emission spectra, Judd-Ofelt spectroscopic parameters and other critical spectroscopic properties were computed, which were further characterized via CIE diagram to analyse the suitability of the prepared glasses for optical applications. The studies revealed that the prepared glasses impart enormous scope in the field of solid-state lasers and color display devices. •Er3+-doped multicomponent tellurite glasses co-embedded with gold nanoparticles are prepared.•The concentration of the AuNPs is optimized as 0.2 mol% for enhanced photoluminescence.•The enhancement in luminescence is attributed to localized electric field by the gold nanoparticles.•Average particle size of silver nanoparticles was obtained as∼10 nm from the TEM analysis.•AuNP/RE3+ doped tellurite glasses is a best alternative of RE3+ single doped tellurite glasses.