纳米晶复合Er^(3+)掺杂Ge-In-S-CsI玻璃的发光性能

Luminescence Properties of Nanocrystals Composited Er^(3+) Ions Doped Ge-In-S-CsI Glasses

纳米晶复合的玻璃材料在稀土离子发光方面有着重要的研究意义。用真空熔融淬冷法制备了Er3+掺杂的70GeS2–20In2S3–10CsI玻璃样品,研究了不同温度和时间热处理玻璃基质内部析出的纳米晶对Er3+发光性能的影响。结果表明:随着热处理温度和时间的增加,玻璃样品的短波截止波长发生了明显的红移现象。在380℃经过18h热处理后的玻璃样品析出均匀的纳米晶颗粒,尺寸约为10～20nm。玻璃基质中先后析出In2S3和GeS2晶体。玻璃样品在380℃,经过12h热处理后,Er3+在1540nm处的发光增强了3倍,有望应用于C波段通讯用光纤放大器。

The Er2S3 and Ag2S co-doped 70GeS2-20In2S3-10CsI glasses were synthesized by a vacuumed melt-quenching technique. The influence of precipitated nanoerystal on the luminescence properties of RE （rare earth） ions was investigated. The short-wavelength absorption edge appears red-shift when the temperature and duration increase. For the samples treated at 380 ℃ for 12 h, the nanocrystals in the size range from 10 to 20 um disperse homogeneously in the glass. The In2S3 and GeS2 nanocrystals precipitate successively. The intensity of 1 540 um luminescence of Er3＋ ions is three times greater than that of the glass matrix. The El3＋ ions doped chalcogenide glasses with the nanocrystals have potential applications in the C band optical fiber amplifier.