Defect evolution and color center generation of high energy density femtosecond laser processed IIa diamond

• Published in: Nanotechnology and Precision Engineering Vol. 8; no. 4
• Main Authors: Dong, Bing, Sun, Qingqing, Wang, Jianshi, Song, Ying, Ren, Fei, Xu, Zongwei
• Format: Journal Article
• Language: English
• Published: 01.12.2025
• ISSN: 1672-6030; 2589-5540
• DOI: 10.1063/10.0036174

This study investigated the effects of high-energy-density femtosecond laser pulses on diamond under different pulse counts, revealing the resulting structural changes and defect-formation mechanisms. Raman spectroscopy and low-temperature fluorescence spectroscopy were used to examine the surface damage, stress, and defect evolution of diamond under varying numbers of pulses. The results revealed the generation of nitrogen-vacancy color centers in diamond under high-energy-density pulsed laser irradiation without requiring annealing treatment. Additionally, confocal spectroscopy provided a distribution model for the evolution of damage and defects in diamond after femtosecond laser processing. This research provides valuable insights into optimizing femtosecond laser processing techniques and improves our understanding of the structural changes and defect-formation mechanisms in diamond.