Wang Xu, Zhang Guodong, Li Guangying, Lou Rui, Sun Zhe, Xie Xiaoping, Li Weinan, Cheng Guanghua
State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics of CAS, Xi'an 710119, China.
School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China.
Micromachines (Basel). 2021 May 26;12(6):615. doi: 10.3390/mi12060615.
Microfluidic chips and optical elements can be fabricated based on the nonlinear photosensitivity in photo-thermo-refractive (PTR) glass by controlling the growth of nanocrystals in the femtosecond (fs) laser-irradiated region. Here, we focus on CeO and SbO that play important roles in UV irradiation, experimentally investigate the effects of the dopants on the nonlinear photochemical process in PTR glass triggered by fs Gaussian-Bessel beams. The results show that the generation of Ag atoms and the Ag nanoparticles can be improved by CeO and SbO co-doping. Besides, each multivalent ion in PTR glass possibly participates in the electron transfer processes and contributes to the generation of Ag atoms. Finally, X-ray diffraction analysis reveals the precipitation of NaF nanocrystals with an average size of 10 to 12 nm after laser irradiation and thermal treatment, which is unrelated to the dopants.
通过控制飞秒（fs）激光辐照区域内纳米晶体的生长，可以基于光热折射（PTR）玻璃中的非线性光敏性来制造微流控芯片和光学元件。在此，我们聚焦于在紫外线照射中起重要作用的CeO和SbO，通过实验研究了掺杂剂对飞秒高斯-贝塞尔光束触发的PTR玻璃中非线性光化学过程的影响。结果表明，CeO和SbO共掺杂可以提高Ag原子和Ag纳米颗粒的生成。此外，PTR玻璃中的每个多价离子可能都参与了电子转移过程，并有助于Ag原子的生成。最后，X射线衍射分析表明，激光辐照和热处理后会析出平均尺寸为10至12nm的NaF纳米晶体，这与掺杂剂无关。
