Liu Rui, Pan Linghao, Meng Fanqi, Feng Xia, Zhang Qitu, Hou Yi, Wang Lixi
College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 211816, China.
Materials (Basel). 2025 Apr 18;18(8):1861. doi: 10.3390/ma18081861.
The development of multi-band laser suppression materials has been driven by the limitations of single-band laser suppression materials. Inorganic ceramic materials, compared with organic laser suppression materials, photonic crystals, and metamaterials, offer significant advantages in fabrication methods and environmental stability. In this study, Co ions, with relatively higher electronegativity, were introduced to substitute some Fe ion sites in ErFeO. This substitution caused distortion in the crystal structure, reduced the unit cell volume, and altered the band structure. As a result, the band gap was reduced compared with that of ErFeO, and the unique energy level transitions of Er ions were activated. This led to dual-band laser suppression with reflectances of 22.16% at 1064 nm and 35.63% at 1540 nm. Furthermore, after high-temperature testing at 1100 °C in air, the laser absorption performance could still be maintained with the intensity retention above 95%. This unique strategy for improving the band structure provides significant potential for applications in laser suppression.
多波段激光抑制材料的发展是由单波段激光抑制材料的局限性所推动的。与有机激光抑制材料、光子晶体和超材料相比，无机陶瓷材料在制造方法和环境稳定性方面具有显著优势。在本研究中，引入电负性相对较高的钴离子来替代铒铁氧体中的一些铁离子位点。这种替代导致晶体结构畸变，减小了晶胞体积，并改变了能带结构。结果，与铒铁氧体相比，带隙减小，铒离子独特的能级跃迁被激活。这导致了双波段激光抑制，在1064nm处的反射率为22.16%，在1540nm处的反射率为35.63%。此外，在空气中1100℃高温测试后，激光吸收性能仍能保持，强度保留率在95%以上。这种改善能带结构的独特策略在激光抑制应用中具有巨大潜力。
