Sontakke, A.D and Biswas, Kaushik and Mandal, Ashis Kumar and Annapurna, K (2010) Concentration quenched luminescence and energy transfer analysis of Nd(3+) ion doped Ba-Al-metaphosphate laser glasses. Appllied Physics B-Lasers and Optics, 101 (1-2). pp. 235-244. ISSN 0946-2171

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This paper reports the dopant ion (Nd(3+)) concentration effects on its luminescence properties in a new glass system based on barium-alumino-metaphosphates. Amongst the studied concentrations range of 0.276-13.31x10(20) ions/cm(3), the glass with 2.879x10(20) ions/cm(3) (1 mol%) Nd(3+) concentration shows intense NIR emission from (4)F(3/2) excited state, followed by a decrease in emission intensity for further increase in Nd(3+) ion concentration. The observed luminescence quenching is ascribed to Nd(3+) self-quenching through the donor-donor migration assisted cross-relaxation mechanism. The microscopic energy transfer parameters for donor-acceptor energy transfer, C (DA), and donor-donor energy migration, C (DD), have been obtained from the theoretical fittings to experimental decay curves and the spectral overlap model respectively. The C (DD) parameters (x10(-39) cm(6)/sec) are found to be about three orders greater than that of C (DA) (x10(-42) cm(6)/sec) for Nd(3+) self-quenching in this host, demonstrating that the excitation energy migration among donors is due to the hopping mechanism. The energy transfer micoparameters obtained in the present study are comparable to the values reported for commercially available laser glasses LHG-8 and Q-98.

Item Type: Article
Subjects: Glass
Depositing User: Bidhan Chaudhuri
Date Deposited: 16 Feb 2012 10:24
Last Modified: 14 Nov 2013 09:01

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