Persistent spectral hole burning at temperatures up to 200 K was first time observed in Eu<sup>3+</sup>-ion-doped aluminosilicate glass. Glass having a composition of 2-wt. % Eu<sub>2</sub>O<sub>3</sub>-containing Al<sub>2</sub>O<sub>3</sub> ⋅ 9SiO<sub>2</sub> was prepared by heating the gel synthesized from metal alkoxides at 900 °C. The persistent spectral holes were burned in the <sup>7</sup>F<sub>0</sub>→<sup>5</sup>D<sub>0</sub> line of the Eu<sup>3+</sup> ions by a dye laser with a bandwidth of ~1 cm<sup>−1</sup>, of which width and depth were ~3 cm<sup>−1</sup> and ~10% of the total fluorescence intensity, respectively, at 77 K. It was found that the hole depth decreased with increasing temperature and was erased above 220 K. The local environment of the Eu<sup>3+</sup> ions in glass is discussed with regard to the fluorescence line narrowing spectra of the <sup>5</sup>D<sub>0</sub>→<sup>7</sup>F<sub>1</sub> transition.
© 1998 Optical Society of America
(160.2750) Materials : Glass and other amorphous materials
(160.5690) Materials : Rare-earth-doped materials
(160.6060) Materials : Solgel
(210.4810) Optical data storage : Optical storage-recording materials
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
Masayuki Nogami and Yoshihiro Abe, "Persistent spectral hole burning in Eu3+-doped aluminosilicate glass at high temperature," J. Opt. Soc. Am. B 15, 680-683 (1998)