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Optical absorption and photoluminescence studies of Nd3 doped alkali boro germanate glasses

Kumar, Sunil S and Khatei, Jayakrishna and Kasthurirengan, S and Rao, Koteswara KSR and Ramesh, KP (2011) Optical absorption and photoluminescence studies of Nd3 doped alkali boro germanate glasses. In: Journal of Non-Crystalline Solids, 357 (3). pp. 842-846.

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Official URL: http://dx.doi.org/10.1016/j.jnoncrysol.2010.11.007

Abstract

Optical absorption and photoluminescence studies have been carried out at room temperature in 25 R2O-25 GeO2-49.5 B2O3-0.5 Nd2O3 glass systems, (Composition in mol%, R= Li, Na, K and Rb). Judd Ofelt Intensity parameters and other parameters like Racah (E-1, E-2 and E-3), Slater-Condon-Shortley (F-2, F-4 and F-6) Spin-Orbit Coupling (xi(4f)) and Configuration Interaction (alpha,beta and gamma) for Nd3+ ion in the glass system are calculated. The variation of the 02 parameters are interpreted in terms of the covalency of the RE ion in the glass matrix. Further the hypersensitive transition I-4(9/2) -> (4)G(5/2), (2)G(7/2) is analyzed with respect to the intensity ratio I-L/I-S and is found to be dependent on the type of alkali in the glass matrix. The Photoluminescence studies do not show any appreciable shift in the peak emission wavelength of the F-4(3/2) to I-4(11/2) transition with the change in alkali type. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Optical absorption;Photoluminescence;Neodymium;Glasses;Judd Ofelt
Department/Centre: Others
Division of Physical & Mathematical Sciences > Physics
Date Deposited: 08 Apr 2011 05:52
Last Modified: 08 Apr 2011 05:52
URI: http://eprints.iisc.ernet.in/id/eprint/36570

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