Abstract
Persistent spectral hole burning was studied in Eu3+ ions-doped Al2O3-SiO2 glass prepared by a sol-gel method. The gel synthesized by the hydrolysis of Si- and Al-alkoxides and EuCl3·6H2O was heated in air and hydrogen gas atmospheres. For the glass heated in air to contain OH bonds, the hole was formed by the photoinduced rearrangement of the OH bonds surrounding the Eu3+ ions, and was thermally refilled and erased above ∼200 K. On the other hand, the glass heated in hydrogen gas showed the hole spectrum above ∼200 K. It was found that the hole depth was independent of the temperature and was ∼7% of the total intensity at room temperature. The proposed mechanism was the electron transfer between the Eu3+ ions and the defect centers formed in glass matrix.
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Nogami, M., Nagakura, T., Hayakawa, T. et al. Prospects of Sol-Gel Process for Spectral Hole-Burning Glasses. Journal of Sol-Gel Science and Technology 19, 253–256 (2000). https://doi.org/10.1023/A:1008700724894
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DOI: https://doi.org/10.1023/A:1008700724894