First-principles study of metallic impurities induced 355 nm UV laser absorption in fused silica

• DOI: 10.1016/j.jmrt.2022.10.107
• Publication Date: 2022-10-28T09:21:03Z
• Authors: Qingyi Feng; Xiaotao Zu; Biyi Wang; Lijie Sun; Bo li; Xia Xiang; Li Li; Ye Tian; Xiaodong Yuan; Wanguo Zheng; Hongdong Yang; Huiqiu Deng; Sean Li; Hongxiang Deng
• Keywords: UV laser; Mining engineering. Metallurgy; 0103 physical sciences; TN1-997; First principles theory; Fused silica; 01 natural sciences; Impurities; Absorption

To date, it is controversial which metallic impurities play crucial role in the laser induced degradation and damage of fused silica at 355 nm. In this work, a First -principles study for influences are presented, usually contaminated during manufacture post-processing processes. Our results show that Ca, K, Fe Ce can lead to obvious optical absorption near Moreover, we find that, K intensity nm highly sensitive concentration. indicate Ca easily induce These two should be concerned The detailed theoretical reveal impurity states band gap originated from transition between conduction band. also with impurity, exciton effect plays an important absorptions nm, while not significant K. work helps explore mechanism improve techniques silica.