Yan Jianfeng, Tan Jiajia, Lin Quanhua, Zhang Zhihao, Liu Ziang, Fu Qiang, Yuan Lei, Zhang Qi, Feng Xu, Zhou Shifeng
State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques, Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices, Guangzhou, 510640, China.
Adv Mater. 2025 May;37(21):e2501131. doi: 10.1002/adma.202501131. Epub 2025 Apr 7.
LiNbO nanocrystal-glass composites (LiNbO-NGC), characterized by its unique 3D random domain structure, have shown great promise for significant applications, such as femtosecond pulse monitoring and full-color 3D displays. However, the nonlinear response of the LiNbO-NGC is greatly suppressed by the defects, and effective manipulation of these defects remains a long-standing challenge. In this study, a Na-hybridization strategy is proposed to control defects in the LiNbO-NGC to enhance its nonlinear properties and realizing its practical application for ultrashort optical pulse monitoring. The findings reveal that the incorporation of Na ions effectively reduces the defects within the composite, resulting in significantly improved nonlinear effects. By using this hybridized LiNbO-NGC, the transverse second-harmonic generation is achieved. An ultrashort optical pulse system is also constructed and successfully applied it for real-time quantitative measurement of the duration, distribution, and front tilting of optical pulses in the 10 s scale. These results not only present an excellent example about defect engineering in nonlinear LiNbO-NGC but also point to practical applications for the measurement of extreme physical parameters.
铌酸锂纳米晶体-玻璃复合材料（LiNbO-NGC）具有独特的三维随机畴结构，在飞秒脉冲监测和全彩3D显示等重要应用中展现出巨大潜力。然而，LiNbO-NGC的非线性响应受到缺陷的极大抑制，有效控制这些缺陷仍是一个长期挑战。在本研究中，提出了一种钠杂化策略来控制LiNbO-NGC中的缺陷，以增强其非线性特性并实现其在超短光脉冲监测中的实际应用。研究结果表明，钠离子的掺入有效减少了复合材料中的缺陷，从而显著改善了非线性效应。通过使用这种杂化的LiNbO-NGC，实现了横向二次谐波产生。还构建了一个超短光脉冲系统，并成功将其应用于10秒尺度上光脉冲持续时间、分布和前沿倾斜的实时定量测量。这些结果不仅为非线性LiNbO-NGC中的缺陷工程提供了一个出色范例，也为极端物理参数的测量指明了实际应用方向。
