Universiti Teknologi Malaysia Institutional Repository

Enhanced infrared to visible upconversion emission in Er3+ doped phosphate glass containing silver nanoparticles

Amjad, Raja J. and Sahar, Md. Rahim and Ghoshal, Sib Krishna and Riaz, S. (2012) Enhanced infrared to visible upconversion emission in Er3+ doped phosphate glass containing silver nanoparticles. Solid State Science and Technology XXVI, 501 . pp. 138-142. ISSN 1022-6680

Full text not available from this repository.

Official URL: http://dx.doi.org/10.4028/www.scientific.net/AMR.5...

Abstract

Phosphate glasses containing fixed concentration of rare-earth with and without metallic nanoparticles (NPs) having compositions (59.5-x) P2O5-MgO-xAgCl-0.5Er2O3, where 0 = x = 1.5 mol% was prepared using melt-quenching technique. Spectral characterizations were made using UV-VIS-IR spectroscopy and photoluminescence spectroscopy. Addition of silver NPs enhanced the corresponding absorption and was optimum at 1.5 mol% AgCl. Infrared to visible frequency upconversion (UC) emission were observed in the glass on pumping with 797 nm radiation. Furthermore, it was found that the emission at 540 nm, due to Er3+transition (4S3/2-4I15/2) was much more influenced by the silver NPs in comparison to the emission at 632 nm (4F9/2 - 4I15/2). These enhancements were attributed to the local fields present in the vicinity of silver NPs. Moreover, the rapid increase in the intensity of the green band as compared to the red band was due to the charge cloud effect of the plasmon band. Since green band lie more close to the plasmon frequency band of Ag and hence showed rapid increase compared to the far lying red bands. Our findings may contribute towards the development of solid state laser and sensors.

Item Type:Article
Uncontrolled Keywords:Luminescence, Silver Nanoparticle, Upconversion
Subjects:Q Science
Divisions:Science
ID Code:36017
Deposited By: Fazli Masari
Deposited On:04 Dec 2013 09:13
Last Modified:30 Nov 2018 14:41

Repository Staff Only: item control page