Opt Lett. 2018 Jun 1;43(11):2519-2522. doi: 10.1364/OL.43.002519.
We report the one-step precipitation of CdS quantum dots in the volume of CdS-doped silicate glass under the focused femtosecond laser beam without additional heat treatment of glass. Femtosecond direct laser writing leads to the annular distribution of the precipitated CdS quantum dots in laser-written domain optical properties of which could be tuned by laser beam parameters. Increasing the laser pulse number to 10 significantly enhances luminescence intensity in the domains, while further increasing up to 10 pulses leads to luminescence quenching. A possible scenario for the formation and distribution of quantum dots is proposed.
我们报告了在没有额外热处理的情况下，在 CdS 掺杂硅酸盐玻璃的体积中通过聚焦飞秒激光束一步沉淀 CdS 量子点。飞秒直接激光写入导致沉淀的 CdS 量子点在激光写入区域中的环形分布，其光学性质可以通过激光束参数进行调整。将激光脉冲数增加到 10 可以显著提高域中的发光强度，而进一步增加到 10 个脉冲会导致发光猝灭。提出了一种形成和分布量子点的可能方案。
