Halder, A and Chattopadhyay, R and Majumder, S and Bysakh, Sandip and Paul, Mukul Chandra and Das, Shyamal and Bhadra, Shyamal Kumar and Unnikrishnan, Manju (2015) Highly fluorescent silver nanoclusters in alumina-silica composite optical fiber. Applied Physics Letters, 106 (1). ISSN 0003-6951

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An efficient visible fluorescent optical fiber embedded with silver nanoclusters (Ag-NCs) having size similar to 1 nm, uniformly distributed in alumina-silica composite core glass, is reported. Fibers are fabricated in a repetitive controlled way through modified chemical vapour deposition process associated with solution doping technique. Fibers are drawn from the transparent preforms by conventional fiber drawing process. Structural characteristics of the doped fibers are studied using transmission electron microscopy and electron probe micro analysis. The oxidation state of Ag within Ag-NCs is investigated by X-ray photo electron spectroscopy. The observed significant fluorescence of the metal clusters in fabricated fibers is correlated with electronic model. The experimentally observed size dependent absorption of the metal clusters in fabricated fibers is explained with the help of reported results calculated by ab-initio density functional theory. These optical fibers may open up an opportunity of realizing tunable wavelength fiber laser without the help of rare earth elements. (C) 2015 AIP Publishing LLC.

Item Type: Article
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 29 Dec 2015 11:29
Last Modified: 29 Dec 2015 11:29
URI: http://cgcri.csircentral.net/id/eprint/2995

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