• J Lakshmi

      Articles written in Bulletin of Materials Science

    • Optical absorption and fluorescence properties of Er3+ in sodium borate glass

      Y C Ratnakaram J Lakshmi R P S Chakradhar

      More Details Abstract Fulltext PDF

      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.

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