Metal–organic frameworks (MOF) or their derivatives have attracted much attention in recent years due to exciting properties such as high specific surface area, adjustable pore size, and easy functionalization, which makes them have unique advantages in the fields of catalysis, energy storage, optoelectronics, and so on. However, the study of them in the fields of nonlinear optics and ultrafast photonics is still in its early stage. Here, by annealing the MOF template, porous MOF-derived CuO octahedra are prepared and applied to the above fields. Experiments show that CuO octahedra possess an excellent nonlinear optical absorption capacity in the near-infrared band. When it is used as a saturable absorber (SA) to the fiber lasers, high order harmonic soliton molecules with a repetition frequency up to 238 MHz can be obtained that make sense for optical frequency combs and optical communication. Besides, the dynamic evolution of the harmonic soliton molecule is explored. This work pioneers the application of MOF-derived metal oxide polyhedra as SAs in fiber lasers and expands the application fields of MOF-based materials. Moreover, this kind of emerging microstructured polyhedral SA, prepared by the new method, provides researchers with a new choice beyond quantum dots, nanoparticles, and 2D nanosheets/nanofilms.

中文翻译：

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功能性多孔MOF衍生的CuO八面体用于谐波孤子分子脉冲的产生

近年来，由于金属-有机骨架（MOF）或其衍生物具有令人兴奋的特性，例如高的比表面积，可调节的孔径和易于功能化，因此备受关注，这使其在催化，储能领域具有独特的优势。 ，光电等。然而，它们在非线性光学和超快光子学领域的研究仍处于早期阶段。在此，通过对MOF模板进行退火，制备了多孔的MOF衍生的CuO八面体，并应用于上述领域。实验表明，CuO八面体在近红外波段具有优异的非线性光学吸收能力。当它用作光纤激光器的饱和吸收器（SA）时，可以获得具有高达238 MHz重复频率的高阶谐波孤子分子，这对于光频率梳和光通信是有意义的。此外，还研究了谐波孤子分子的动态演化。这项工作开创了MOF衍生的金属氧化物多面体作为SA在光纤激光器中的应用，并拓宽了MOF基材料的应用领域。此外，通过新方法制备的这种新兴的微结构多面体SA为研究人员提供了除量子点，纳米颗粒和2D纳米片/纳米膜以外的新选择。这项工作开创了MOF衍生的金属氧化物多面体作为SA在光纤激光器中的应用，并拓宽了MOF基材料的应用领域。此外，通过新方法制备的这种新兴的微结构多面体SA为研究人员提供了除量子点，纳米颗粒和2D纳米片/纳米膜以外的新选择。这项工作开创了MOF衍生的金属氧化物多面体作为SA在光纤激光器中的应用，并拓宽了MOF基材料的应用领域。此外，通过新方法制备的这种新兴的微结构多面体SA为研究人员提供了除量子点，纳米颗粒和2D纳米片/纳米膜以外的新选择。