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二阶非线性光学(nonlinear optics,NLO)材料在电光调制和激光倍频等光电子领域均具有重要应用。无机-有机杂化材料兼具有机组分和无机组分的优点,具有较高的NLO系数以及良好的高温和经时稳定性,是该领域的研究热点。本文重点评述了该类材料在NLO性能的改善和稳定性的提高等方面的研究进展,对近年来基于杂化材料的Mach-Zehnder电光调制器的最新研究成果作了概述。提出采用超支化结构有望提高杂化材料的相容性,实现光学非线性、稳定性以及成膜性的综合优化,将是今后发展的重要方向。
Second-order nonlinear optics (NLO) materials have important applications in optoelectronics such as electro-optic modulation and laser multiplication. Inorganic-organic hybrid materials combine the advantages of organic and inorganic components with high NLO coefficient and good high temperature and long-term stability, which are the hot topics in this field. In this paper, the research progress of the improvement of the NLO performance and the stability of the materials are reviewed. The latest research results of the Mach-Zehnder electro-optic modulator based on hybrid materials in recent years are summarized. It is proposed that the use of hyperbranched structure is expected to improve the compatibility of hybrid materials and achieve the overall optimization of optical nonlinearity, stability and film-forming properties, which will be an important direction for future development.