Femtosecond laser-induced damage on the surface of KDP crystals by Zn2+ doping

IF 3.8 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2024-10-11 DOI:10.1016/j.optmat.2024.116258

Yan Liu , Yujia Zhang , Xiaoqing Liu , Chengrui Tian , Jiezhao Lv , Changfeng Fang , Qingbo Li , Chun Wang , Xian Zhao

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Abstract

An experimental and numerical study of femtosecond laser-induced surface damage of the potassium dihydrogen phosphate (KDP) crystals doped with Zn²⁺ is presented. Based on COMSOL® Multiphysics 6.1, electron-lattice nonequilibrium interactions were simulated to obtain the temporal evolution of electron concentration, electron temperature, and lattice temperature. The surface damage profile of the samples was analyzed by optical microscopy, and the single-pulse damage threshold was determined. Raman spectra shows that the chemistry of the crystals appeared to remain constant before and after the damage. Single-particle fluorescence spectroscopy indicates that the fluorescence intensity first decreased and then increased with increasing doping concentration. However, the laser-induced damage threshold (LIDT) was negatively correlated with the defect concentration, which may be a result of the synergistic effect of nonlinear adsorption and defect concentration. The above work attempts to give a rational explanation for the process of femtosecond laser damage to the surface of KDP crystals.

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Zn2+ 掺杂对 KDP 晶体表面的飞秒激光诱导损伤

本文介绍了飞秒激光诱导掺杂 Zn2+ 的磷酸二氢钾（KDP）晶体表面损伤的实验和数值研究。基于 COMSOL® Multiphysics 6.1，模拟了电子-晶格非平衡相互作用，从而获得了电子浓度、电子温度和晶格温度的时间演化。通过光学显微镜分析了样品的表面损伤曲线，并确定了单脉冲损伤阈值。拉曼光谱显示，晶体的化学性质在损伤前后似乎保持不变。单颗粒荧光光谱显示，随着掺杂浓度的增加，荧光强度先减弱后增强。然而，激光诱导损伤阈值（LIDT）与缺陷浓度呈负相关，这可能是非线性吸附和缺陷浓度协同作用的结果。上述工作试图合理解释飞秒激光对 KDP 晶体表面的损伤过程。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.