Tunable bandgap and luminescence properties by engineering exciton coupling in Ag NP embedded Er3+ bismuth tellurite glass system

• Published in: Optical and Quantum Electronics
• Main Author: Sutrisno M.S.; Yusof N.N.; Hisam R.
• Format: Article
• Language: English
• Published: Springer 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85197447425&doi=10.1007%2fs11082-024-07184-y&partnerID=40&md5=2a9e4be37c9ce1b2d4b1898918650209

Glass compositions of 20Li2O-xBi2O3-(78-x)TeO2-1Er2O3-1Ag were fabricated to explore exciton-phonon and exciton-plasmon coupling for laser technology. The Urbach tails analysis indicates increased exciton-phonon coupling at x < 11 mol%, inferred from the disorder parameter Eo. The Elliott-Washington hydrogenic excitonic model highlights a decrease in optical bandgap (Eg) at x < 11 mol% before reaching a maximum at x = 11 mol%. Exciton-phonon coupling was analyzed using the Huang-Rhys parameter S. Fano resonance analysis suggests enhanced exciton-plasmon coupling at x = 5 mol%, leading to enhanced luminescence intensity (2H11/2). Methods including coupling polarizability α(λ), Purcell factor, and Lamb shift were employed to analyze the exciton-plasmon coupling. The ability to fine-tune optical properties is crucial for tailored laser emissions, applicable in light-emitting devices and material processing, where precise laser characteristics are essential. © The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.