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      https://www.ias.ac.in/article/fulltext/boms/028/05/0461-0465

    • Keywords

       

      Optical band gap; intensity parameter; transition probability.

    • Abstract

       

      Spectroscopic properties of Er3+ ions in sodium borate glass have been studied. The indirect and direct optical band gaps (𝐸opt) and energy level parameters (Racah (𝐸1, 𝐸2 and 𝐸3), spin-orbit (𝜉4f) and configurational interaction (𝛼)) are evaluated. Spectral intensities for various absorption bands of Er3+ doped sodium borate glass are calculated. Using Judd–Ofelt intensity parameters (𝛺2, 𝛺4, 𝛺6), radiative transition probabilities (𝐴), branching ratios (𝛽) and integrated absorption cross sections (𝛴 ) are reported for certain transitions. The radiative lifetimes (𝜏R) for different excited states are estimated. From the fluorescence spectra, the emission cross section (𝜎p) for the transition, ${}^{4}I_{13/2} \rightarrow {}^{4}I_{15/2}$ is reported.

    • Author Affiliations

       

      Y C Ratnakaram1 J Lakshmi1 R P S Chakradhar2

      1. Department of Physics, S.V. University P.G. Centre, Kavali 524 201, India
      2. Department of Physics, Indian Institute of Science, Bangalore 560 012, India
    • Dates

       
  • Bulletin of Materials Science | News

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      Posted on July 25, 2019

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