Author/Authors :
Sun، نويسنده , , Hong-Tao and Shimaoka، نويسنده , , Fumiaki and Ruan، نويسنده , , Jian and Miwa، نويسنده , , Yuji and Fujii، نويسنده , , Minoru and Qiu، نويسنده , , Jianrong and Mizuhata، نويسنده , , Minoru and Deki، نويسنده , , Shigehito and Hayashi، نويسنده , , Shinji، نويسنده ,
Abstract :
We report on highly efficient broadband near-infrared photoluminescence (PL) in Ni2+-doped glass ceramics (GCs) films fabricated by annealing Si/Ni2+-doped glass superlattices (SNGS). Over two orders of magnitude enhancement of PL can be achieved in comparison with that from the annealed glass film. The PL lifetime of the annealed SNGS is several milliseconds, which is much longer than those of bulk GCs. The strong PL enhancement results from the formation of high-quality cordierite nanocrystals because the Si layers act as Si source for the crystal growth. This technique can be extended to fabricate other types of high-quality GCs films.
