Electronic absorption spectra and energy gap studies of Er3+ ions in different chlorophosphate glasses

Ratnakaram, YC and Reddy, Viswanadha A and Chakradhar, Sreekanth RP (2002) Electronic absorption spectra and energy gap studies of Er3+ ions in different chlorophosphate glasses. In: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 58 (8). pp. 1809-1822.

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Abstract

Spectroscopic properties of Er3+ ions in different chlorophosphate glasses 50P2O5-30Na2HPO4-19.8RCl (R=Li, Na, K, Ca and Pb) are studied. The direct and indirect optical band gaps (Eopt) and the various spectroscopic parameters (E1, E2, E3, and \xi 4f and \alpha ) are reported. The oscillator strengths of the transitions in the absorption spectrum are parameterized in terms of three Judd-Ofelt intensity parameters (\Omega 2, \Omega 4 and \Omega 6). These intensity parameters are used to predict the transition probabilities (A), radiative lifetimes (\tau R), branching ratios (\beta) and integrated cross sections (\Sigma) for stimulated emission. Attention has been paid to the trend of the intensity parameters over hypersensitive transitions and optical band gaps. The lifetimes and branching ratios of certain transitions are compared with other glass matrices.

Item Type:	Journal Article
Publication:	Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy
Publisher:	Elsevier Science
Additional Information:	Copyright for this article belongs to Elsevier Science.
Keywords:	Absorption spectra;Energy gap;Judd-Ofelt parameter;Radiative lifetime;branching ratio
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	22 Dec 2004
Last Modified:	19 Sep 2010 04:17
URI:	http://eprints.iisc.ac.in/id/eprint/2500

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