Sontakke, Atul D and Biswas, Kaushik and Mandal, Ashis Kumar and Annapurna, K (2010) Time Resolved Fluorescence and Energy Transfer Analysis of Nd(3+)-Yb(3+)-Er(3+) Triply-Doped Ba-Al-Metaphosphate Glasses for an Eye Safe Emission (1.54 mu m). Journal of Fluorescence, 20 (1). pp. 425-434. ISSN 1053-0509

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Abstract

This paper reports on the preparation and systematic analysis of energy transfer mechanisms in Nd(3+)-Yb(3+)-Er(3+) co-doped new series of barium-alumino-metaphosphate glasses. The time resolved fluorescence of Nd(3+) in triply doped Ba-Al-metaphosphate glasses have revealed that, Yb(3+) ions could function as quite efficient bridge for an energy transfer between Nd(3+) and Er(3+) ions. As a result, a fourfold emission enhancement at 1.54 mu m of Er(3+) ions has been achieved through an excitation of (4)F(5/2) level of Nd(3+) at 806 nm for the glass having 3 mol% Yb(3+) with an energy transfer efficiency reaching up to 94%. Decay of donor (Nd(3+)) ion fluorescence has been analyzed based on theoretical models such as direct energy transfer model (Inokuti-Hirayama) and migration assisted energy transfer models (Burshtein's hopping and Yokota-Tanimoto's diffusion). The corresponding energy transfer parameters have been evaluated and discussed. Primarily, electrostatic dipole-dipole (s similar to 6) interactions are found to be responsible for the occurrence of energy transfer process in theses glasses.

Item Type:	Article
Uncontrolled Keywords:	Metaphosphate glasses; Energy transfer; Fluorescence; Sensitized Er(3+) NIR emission
Subjects:	Glass
Divisions:	UNSPECIFIED
Depositing User:	Bidhan Chaudhuri
Date Deposited:	16 Feb 2012 10:24
Last Modified:	26 May 2016 04:57
URI:	http://cgcri.csircentral.net/id/eprint/923

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